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/reducercommutativity/sum20_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d63d1fb [2018-01-27 23:07:37,672 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-27 23:07:37,700 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-27 23:07:37,721 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-27 23:07:37,721 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-27 23:07:37,722 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-27 23:07:37,723 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-27 23:07:37,726 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-27 23:07:37,728 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-27 23:07:37,729 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-27 23:07:37,730 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-27 23:07:37,731 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-27 23:07:37,732 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-27 23:07:37,733 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-27 23:07:37,734 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-27 23:07:37,736 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-27 23:07:37,738 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-27 23:07:37,740 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-27 23:07:37,741 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-27 23:07:37,743 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-27 23:07:37,745 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-27 23:07:37,745 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-27 23:07:37,746 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-27 23:07:37,747 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-27 23:07:37,748 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-27 23:07:37,749 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-27 23:07:37,749 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-27 23:07:37,750 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-27 23:07:37,750 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-27 23:07:37,751 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-27 23:07:37,751 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-27 23:07:37,752 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 [2018-01-27 23:07:37,763 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-27 23:07:37,763 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-27 23:07:37,764 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-27 23:07:37,764 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-27 23:07:37,764 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-27 23:07:37,765 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-27 23:07:37,765 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-27 23:07:37,765 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-27 23:07:37,766 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-27 23:07:37,766 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-27 23:07:37,766 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-27 23:07:37,766 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-27 23:07:37,767 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-27 23:07:37,767 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-27 23:07:37,767 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-27 23:07:37,767 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-27 23:07:37,767 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-27 23:07:37,768 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-27 23:07:37,768 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-27 23:07:37,768 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-27 23:07:37,768 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-27 23:07:37,768 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-27 23:07:37,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-27 23:07:37,769 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-27 23:07:37,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-27 23:07:37,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-27 23:07:37,770 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-27 23:07:37,770 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-27 23:07:37,770 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-27 23:07:37,770 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-27 23:07:37,770 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-27 23:07:37,771 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-27 23:07:37,771 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-27 23:07:37,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-27 23:07:37,771 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-27 23:07:37,772 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-27 23:07:37,772 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-27 23:07:37,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-27 23:07:37,830 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-27 23:07:37,834 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-27 23:07:37,836 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-27 23:07:37,836 INFO L276 PluginConnector]: CDTParser initialized [2018-01-27 23:07:37,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum20_true-unreach-call.i [2018-01-27 23:07:37,970 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-27 23:07:37,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-27 23:07:37,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-27 23:07:37,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-27 23:07:37,991 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-27 23:07:37,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:07:37" (1/1) ... [2018-01-27 23:07:37,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62689477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:37, skipping insertion in model container [2018-01-27 23:07:37,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:07:37" (1/1) ... [2018-01-27 23:07:38,017 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:07:38,041 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:07:38,235 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:07:38,270 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:07:38,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38 WrapperNode [2018-01-27 23:07:38,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-27 23:07:38,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-27 23:07:38,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-27 23:07:38,287 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-27 23:07:38,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (1/1) ... [2018-01-27 23:07:38,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-27 23:07:38,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-27 23:07:38,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-27 23:07:38,330 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-27 23:07:38,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (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 [2018-01-27 23:07:38,414 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-27 23:07:38,414 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-27 23:07:38,414 INFO L136 BoogieDeclarations]: Found implementation of procedure sum [2018-01-27 23:07:38,414 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-27 23:07:38,414 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-27 23:07:38,414 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-27 23:07:38,415 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-27 23:07:38,415 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-27 23:07:38,415 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-27 23:07:38,415 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-27 23:07:38,415 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-27 23:07:38,415 INFO L128 BoogieDeclarations]: Found specification of procedure sum [2018-01-27 23:07:38,416 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-27 23:07:38,416 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-27 23:07:38,416 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-27 23:07:38,907 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-27 23:07:38,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:07:38 BoogieIcfgContainer [2018-01-27 23:07:38,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-27 23:07:38,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-27 23:07:38,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-27 23:07:38,913 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-27 23:07:38,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:07:37" (1/3) ... [2018-01-27 23:07:38,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1458da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:07:38, skipping insertion in model container [2018-01-27 23:07:38,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:07:38" (2/3) ... [2018-01-27 23:07:38,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1458da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:07:38, skipping insertion in model container [2018-01-27 23:07:38,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:07:38" (3/3) ... [2018-01-27 23:07:38,918 INFO L105 eAbstractionObserver]: Analyzing ICFG sum20_true-unreach-call.i [2018-01-27 23:07:38,929 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-27 23:07:38,941 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-27 23:07:38,999 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:07:39,000 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:07:39,000 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:07:39,000 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:07:39,000 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:07:39,000 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:07:39,001 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:07:39,001 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-27 23:07:39,002 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:07:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:07:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-27 23:07:39,035 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:39,037 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-27 23:07:39,037 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-27 23:07:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash 114361, now seen corresponding path program 1 times [2018-01-27 23:07:39,047 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:39,048 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:39,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,113 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:39,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:07:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:07:39,195 INFO L389 BasicCegarLoop]: Counterexample might be feasible [2018-01-27 23:07:39,204 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-27 23:07:39,220 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:07:39,221 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:07:39,221 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:07:39,221 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:07:39,221 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:07:39,221 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:07:39,221 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:07:39,222 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-27 23:07:39,222 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:07:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:07:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-27 23:07:39,228 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:39,229 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:07:39,229 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1258483300, now seen corresponding path program 1 times [2018-01-27 23:07:39,230 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:39,231 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:39,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,232 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:39,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:39,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-27 23:07:39,369 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:07:39,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 23:07:39,372 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-27 23:07:39,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-27 23:07:39,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 23:07:39,391 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-01-27 23:07:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:39,427 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2018-01-27 23:07:39,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 23:07:39,430 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2018-01-27 23:07:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:39,448 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:07:39,448 INFO L226 Difference]: Without dead ends: 50 [2018-01-27 23:07:39,452 INFO L533 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 [2018-01-27 23:07:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-27 23:07:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-27 23:07:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-27 23:07:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-27 23:07:39,627 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2018-01-27 23:07:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:39,627 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-27 23:07:39,627 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-27 23:07:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-27 23:07:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-27 23:07:39,634 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:39,634 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2018-01-27 23:07:39,634 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash -983082746, now seen corresponding path program 1 times [2018-01-27 23:07:39,635 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:39,635 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:39,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,640 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:39,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:39,669 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-27 23:07:39,786 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:07:39,787 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:07:39,790 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:07:39,792 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:07:39,792 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:07:39,793 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 3 states. [2018-01-27 23:07:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:39,887 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2018-01-27 23:07:39,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:07:39,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-01-27 23:07:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:39,892 INFO L225 Difference]: With dead ends: 93 [2018-01-27 23:07:39,892 INFO L226 Difference]: Without dead ends: 55 [2018-01-27 23:07:39,894 INFO L533 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 [2018-01-27 23:07:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-27 23:07:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2018-01-27 23:07:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-27 23:07:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2018-01-27 23:07:39,910 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 51 [2018-01-27 23:07:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:39,912 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2018-01-27 23:07:39,912 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:07:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2018-01-27 23:07:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-27 23:07:39,914 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:39,914 INFO L330 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:39,915 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:39,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1286187467, now seen corresponding path program 1 times [2018-01-27 23:07:39,919 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:39,919 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:39,920 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,920 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:39,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:39,959 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-27 23:07:40,028 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:40,029 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 [2018-01-27 23:07:40,044 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:40,124 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-01-27 23:07:40,258 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-27 23:07:40,259 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-01-27 23:07:40,259 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-27 23:07:40,259 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-27 23:07:40,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:07:40,260 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2018-01-27 23:07:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:40,363 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2018-01-27 23:07:40,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:07:40,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-01-27 23:07:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:40,365 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:07:40,365 INFO L226 Difference]: Without dead ends: 57 [2018-01-27 23:07:40,366 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:07:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-27 23:07:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-01-27 23:07:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-27 23:07:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-27 23:07:40,378 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 56 [2018-01-27 23:07:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:40,378 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-27 23:07:40,378 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-27 23:07:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-27 23:07:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-27 23:07:40,383 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:40,383 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:40,383 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1323141693, now seen corresponding path program 1 times [2018-01-27 23:07:40,383 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:40,383 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:40,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:40,388 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:40,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:40,448 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:07:40,520 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:07:40,521 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:07:40,521 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:07:40,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:07:40,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:07:40,522 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 3 states. [2018-01-27 23:07:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:40,597 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2018-01-27 23:07:40,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:07:40,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2018-01-27 23:07:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:40,600 INFO L225 Difference]: With dead ends: 82 [2018-01-27 23:07:40,600 INFO L226 Difference]: Without dead ends: 60 [2018-01-27 23:07:40,600 INFO L533 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 [2018-01-27 23:07:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-27 23:07:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-01-27 23:07:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-27 23:07:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-27 23:07:40,608 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 71 [2018-01-27 23:07:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:40,609 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-27 23:07:40,609 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:07:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-27 23:07:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-27 23:07:40,611 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:40,611 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:40,611 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1123185973, now seen corresponding path program 1 times [2018-01-27 23:07:40,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:40,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:40,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:40,613 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:40,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:40,664 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:07:40,757 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:40,757 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 [2018-01-27 23:07:40,772 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:40,841 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:07:40,913 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:40,913 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-27 23:07:40,914 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-27 23:07:40,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-27 23:07:40,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:07:40,914 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2018-01-27 23:07:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:40,992 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2018-01-27 23:07:40,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-27 23:07:40,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2018-01-27 23:07:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:40,995 INFO L225 Difference]: With dead ends: 106 [2018-01-27 23:07:40,995 INFO L226 Difference]: Without dead ends: 64 [2018-01-27 23:07:40,996 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:07:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-27 23:07:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2018-01-27 23:07:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-27 23:07:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2018-01-27 23:07:41,003 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 77 [2018-01-27 23:07:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:41,004 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2018-01-27 23:07:41,004 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-27 23:07:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2018-01-27 23:07:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-27 23:07:41,005 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:41,006 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:41,006 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash 651249060, now seen corresponding path program 2 times [2018-01-27 23:07:41,007 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:41,007 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:41,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:41,009 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:41,009 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:41,038 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:07:41,229 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:41,229 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) [2018-01-27 23:07:41,250 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:07:41,269 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:41,285 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:41,295 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:41,300 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:07:41,360 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:41,360 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-27 23:07:41,360 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-27 23:07:41,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-27 23:07:41,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:07:41,361 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 6 states. [2018-01-27 23:07:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:41,402 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2018-01-27 23:07:41,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-27 23:07:41,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2018-01-27 23:07:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:41,404 INFO L225 Difference]: With dead ends: 111 [2018-01-27 23:07:41,404 INFO L226 Difference]: Without dead ends: 69 [2018-01-27 23:07:41,405 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:07:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-27 23:07:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-01-27 23:07:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-27 23:07:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2018-01-27 23:07:41,414 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 82 [2018-01-27 23:07:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:41,414 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2018-01-27 23:07:41,414 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-27 23:07:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2018-01-27 23:07:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-27 23:07:41,420 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:41,420 INFO L330 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:41,420 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1424072043, now seen corresponding path program 3 times [2018-01-27 23:07:41,420 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:41,421 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:41,421 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:41,421 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:41,422 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:41,452 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:07:41,654 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:41,654 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 [2018-01-27 23:07:41,660 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:07:41,678 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:41,696 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:41,709 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:41,713 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-27 23:07:41,997 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:41,997 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-01-27 23:07:41,997 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:07:41,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:07:41,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:07:41,998 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 8 states. [2018-01-27 23:07:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:42,279 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2018-01-27 23:07:42,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-27 23:07:42,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2018-01-27 23:07:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:42,281 INFO L225 Difference]: With dead ends: 124 [2018-01-27 23:07:42,281 INFO L226 Difference]: Without dead ends: 82 [2018-01-27 23:07:42,282 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:07:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-27 23:07:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2018-01-27 23:07:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-27 23:07:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2018-01-27 23:07:42,289 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 87 [2018-01-27 23:07:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:42,290 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2018-01-27 23:07:42,290 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:07:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2018-01-27 23:07:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-27 23:07:42,292 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:42,292 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:42,292 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash -748922802, now seen corresponding path program 4 times [2018-01-27 23:07:42,293 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:42,293 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:42,294 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:42,294 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:42,294 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:42,322 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:07:42,847 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:42,848 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 [2018-01-27 23:07:42,855 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:07:42,920 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:42,931 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:07:43,017 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:43,017 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-27 23:07:43,018 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:07:43,018 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:07:43,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:07:43,019 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 8 states. [2018-01-27 23:07:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:43,072 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2018-01-27 23:07:43,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-27 23:07:43,073 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2018-01-27 23:07:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:43,074 INFO L225 Difference]: With dead ends: 131 [2018-01-27 23:07:43,074 INFO L226 Difference]: Without dead ends: 84 [2018-01-27 23:07:43,075 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:07:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-27 23:07:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2018-01-27 23:07:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-27 23:07:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-01-27 23:07:43,083 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 107 [2018-01-27 23:07:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:43,084 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-01-27 23:07:43,084 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:07:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-01-27 23:07:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-01-27 23:07:43,086 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:43,086 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:43,086 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1381891197, now seen corresponding path program 5 times [2018-01-27 23:07:43,086 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:43,087 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:43,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:43,088 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:43,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:43,110 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:07:43,449 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:43,450 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) [2018-01-27 23:07:43,465 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:07:43,484 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:43,499 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:43,518 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:43,535 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:43,555 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:43,572 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:43,578 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 62 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-01-27 23:07:43,656 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:43,657 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-01-27 23:07:43,658 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:07:43,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:07:43,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:07:43,658 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 11 states. [2018-01-27 23:07:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:43,888 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2018-01-27 23:07:43,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:07:43,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 112 [2018-01-27 23:07:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:43,890 INFO L225 Difference]: With dead ends: 144 [2018-01-27 23:07:43,890 INFO L226 Difference]: Without dead ends: 97 [2018-01-27 23:07:43,891 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:07:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-27 23:07:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2018-01-27 23:07:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-27 23:07:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2018-01-27 23:07:43,900 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 112 [2018-01-27 23:07:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:43,900 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2018-01-27 23:07:43,900 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:07:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2018-01-27 23:07:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-01-27 23:07:43,902 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:43,902 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 7, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:43,902 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1272996132, now seen corresponding path program 6 times [2018-01-27 23:07:43,903 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:43,903 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:43,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:43,904 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:43,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:43,949 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-01-27 23:07:44,167 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:44,168 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 [2018-01-27 23:07:44,175 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:07:44,192 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:44,202 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:44,207 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:44,214 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:44,220 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:44,236 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:44,241 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-01-27 23:07:44,309 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:44,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2018-01-27 23:07:44,309 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:07:44,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:07:44,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:07:44,310 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 11 states. [2018-01-27 23:07:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:44,498 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2018-01-27 23:07:44,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:07:44,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2018-01-27 23:07:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:44,499 INFO L225 Difference]: With dead ends: 161 [2018-01-27 23:07:44,499 INFO L226 Difference]: Without dead ends: 109 [2018-01-27 23:07:44,500 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:07:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-27 23:07:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2018-01-27 23:07:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-27 23:07:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2018-01-27 23:07:44,508 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 132 [2018-01-27 23:07:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:44,509 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2018-01-27 23:07:44,509 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:07:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2018-01-27 23:07:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-01-27 23:07:44,511 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:44,511 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:44,512 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1486344909, now seen corresponding path program 7 times [2018-01-27 23:07:44,512 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:44,512 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:44,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:44,513 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:44,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:44,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:07:44,659 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:44,659 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 [2018-01-27 23:07:44,665 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:44,713 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:07:44,762 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:44,763 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-27 23:07:44,763 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:07:44,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:07:44,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:07:44,764 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 11 states. [2018-01-27 23:07:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:44,809 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2018-01-27 23:07:44,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-27 23:07:44,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2018-01-27 23:07:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:44,810 INFO L225 Difference]: With dead ends: 168 [2018-01-27 23:07:44,810 INFO L226 Difference]: Without dead ends: 110 [2018-01-27 23:07:44,811 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:07:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-27 23:07:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2018-01-27 23:07:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-27 23:07:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2018-01-27 23:07:44,818 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 143 [2018-01-27 23:07:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:44,819 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2018-01-27 23:07:44,819 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:07:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2018-01-27 23:07:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-01-27 23:07:44,827 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:44,827 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 8, 8, 8, 8, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:44,827 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1248283516, now seen corresponding path program 8 times [2018-01-27 23:07:44,828 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:44,828 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:44,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:44,829 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:44,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:44,865 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:07:45,592 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:45,592 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 [2018-01-27 23:07:45,598 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:07:45,615 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:45,634 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:45,637 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:45,640 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:07:45,762 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:45,763 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-27 23:07:45,763 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-27 23:07:45,764 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-27 23:07:45,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:07:45,764 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 12 states. [2018-01-27 23:07:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:45,854 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2018-01-27 23:07:45,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:07:45,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2018-01-27 23:07:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:45,857 INFO L225 Difference]: With dead ends: 173 [2018-01-27 23:07:45,857 INFO L226 Difference]: Without dead ends: 115 [2018-01-27 23:07:45,857 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:07:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-27 23:07:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-27 23:07:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-27 23:07:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2018-01-27 23:07:45,867 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 148 [2018-01-27 23:07:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:45,867 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2018-01-27 23:07:45,867 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-27 23:07:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2018-01-27 23:07:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-01-27 23:07:45,869 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:45,869 INFO L330 BasicCegarLoop]: trace histogram [12, 10, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:45,870 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 304277549, now seen corresponding path program 9 times [2018-01-27 23:07:45,870 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:45,870 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:45,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:45,871 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:45,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:45,896 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:07:46,119 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:46,119 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 [2018-01-27 23:07:46,128 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:07:46,145 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:46,150 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:46,156 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:46,162 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:46,164 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:46,167 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 124 proven. 21 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-01-27 23:07:46,322 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:46,322 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2018-01-27 23:07:46,323 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:07:46,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:07:46,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:07:46,323 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 16 states. [2018-01-27 23:07:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:46,499 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2018-01-27 23:07:46,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:07:46,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2018-01-27 23:07:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:46,501 INFO L225 Difference]: With dead ends: 186 [2018-01-27 23:07:46,501 INFO L226 Difference]: Without dead ends: 128 [2018-01-27 23:07:46,502 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:07:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-27 23:07:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2018-01-27 23:07:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-27 23:07:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2018-01-27 23:07:46,510 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 153 [2018-01-27 23:07:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:46,510 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2018-01-27 23:07:46,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:07:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2018-01-27 23:07:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-27 23:07:46,512 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:46,513 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 11, 10, 10, 10, 10, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:46,513 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 842916598, now seen corresponding path program 10 times [2018-01-27 23:07:46,513 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:46,513 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:46,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:46,514 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:46,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:46,544 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:07:46,939 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:46,939 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 [2018-01-27 23:07:46,944 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:07:47,048 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:47,052 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:07:47,121 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:47,121 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-27 23:07:47,122 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-27 23:07:47,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-27 23:07:47,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:07:47,123 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 14 states. [2018-01-27 23:07:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:47,225 INFO L93 Difference]: Finished difference Result 193 states and 201 transitions. [2018-01-27 23:07:47,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-27 23:07:47,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2018-01-27 23:07:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:47,227 INFO L225 Difference]: With dead ends: 193 [2018-01-27 23:07:47,227 INFO L226 Difference]: Without dead ends: 130 [2018-01-27 23:07:47,228 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:07:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-27 23:07:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2018-01-27 23:07:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-27 23:07:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2018-01-27 23:07:47,234 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 173 [2018-01-27 23:07:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:47,235 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2018-01-27 23:07:47,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-27 23:07:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2018-01-27 23:07:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-01-27 23:07:47,236 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:47,236 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 11, 11, 11, 11, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:47,236 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:47,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1194573979, now seen corresponding path program 11 times [2018-01-27 23:07:47,237 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:47,237 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:47,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:47,237 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:47,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:47,264 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:07:47,585 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:47,585 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 [2018-01-27 23:07:47,591 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:07:47,608 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,623 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,638 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,653 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,688 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,718 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,733 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,772 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,834 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,920 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:47,932 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:47,962 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 198 proven. 38 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-01-27 23:07:48,650 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:48,650 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2018-01-27 23:07:48,651 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 23:07:48,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 23:07:48,651 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:07:48,651 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 19 states. [2018-01-27 23:07:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:48,797 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2018-01-27 23:07:48,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:07:48,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 178 [2018-01-27 23:07:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:48,798 INFO L225 Difference]: With dead ends: 206 [2018-01-27 23:07:48,798 INFO L226 Difference]: Without dead ends: 143 [2018-01-27 23:07:48,799 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:07:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-27 23:07:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-01-27 23:07:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-01-27 23:07:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2018-01-27 23:07:48,806 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 178 [2018-01-27 23:07:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:48,807 INFO L432 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2018-01-27 23:07:48,807 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 23:07:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2018-01-27 23:07:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-27 23:07:48,809 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:48,809 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 13, 12, 12, 12, 12, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:48,809 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -645084932, now seen corresponding path program 12 times [2018-01-27 23:07:48,809 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:48,809 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:48,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:48,810 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:48,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:48,839 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-01-27 23:07:49,216 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:49,216 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 [2018-01-27 23:07:49,222 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:07:49,239 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,241 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,245 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,249 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,254 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,262 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,270 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:49,271 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:49,276 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 302 proven. 10 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-01-27 23:07:49,355 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:49,355 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2018-01-27 23:07:49,356 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:07:49,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:07:49,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:07:49,356 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand 18 states. [2018-01-27 23:07:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:49,538 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2018-01-27 23:07:49,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 23:07:49,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 198 [2018-01-27 23:07:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:49,540 INFO L225 Difference]: With dead ends: 223 [2018-01-27 23:07:49,540 INFO L226 Difference]: Without dead ends: 155 [2018-01-27 23:07:49,540 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:07:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-01-27 23:07:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-01-27 23:07:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-27 23:07:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2018-01-27 23:07:49,548 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 198 [2018-01-27 23:07:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:49,549 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2018-01-27 23:07:49,549 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:07:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2018-01-27 23:07:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-01-27 23:07:49,551 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:49,551 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 14, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:49,551 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash 953070181, now seen corresponding path program 13 times [2018-01-27 23:07:49,551 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:49,552 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:49,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:49,553 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:49,553 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:49,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:07:50,069 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:50,069 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 [2018-01-27 23:07:50,080 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:50,145 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:07:50,242 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:50,242 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-27 23:07:50,242 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-27 23:07:50,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-27 23:07:50,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:07:50,243 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 17 states. [2018-01-27 23:07:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:50,297 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2018-01-27 23:07:50,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:07:50,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2018-01-27 23:07:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:50,300 INFO L225 Difference]: With dead ends: 230 [2018-01-27 23:07:50,300 INFO L226 Difference]: Without dead ends: 156 [2018-01-27 23:07:50,301 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:07:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-27 23:07:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-01-27 23:07:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-01-27 23:07:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2018-01-27 23:07:50,312 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 209 [2018-01-27 23:07:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:50,312 INFO L432 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2018-01-27 23:07:50,312 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-27 23:07:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2018-01-27 23:07:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-01-27 23:07:50,314 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:50,314 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 15, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:50,314 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash -433863852, now seen corresponding path program 14 times [2018-01-27 23:07:50,315 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:50,315 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:50,316 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:50,316 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:07:50,316 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:50,344 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:07:50,724 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:50,724 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 [2018-01-27 23:07:50,730 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:07:50,752 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:50,789 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:50,793 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:50,806 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:07:50,953 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:50,953 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-27 23:07:50,954 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:07:50,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:07:50,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:07:50,955 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 18 states. [2018-01-27 23:07:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:51,083 INFO L93 Difference]: Finished difference Result 235 states and 243 transitions. [2018-01-27 23:07:51,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 23:07:51,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 214 [2018-01-27 23:07:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:51,085 INFO L225 Difference]: With dead ends: 235 [2018-01-27 23:07:51,085 INFO L226 Difference]: Without dead ends: 161 [2018-01-27 23:07:51,086 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:07:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-27 23:07:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-01-27 23:07:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-27 23:07:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2018-01-27 23:07:51,094 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 214 [2018-01-27 23:07:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:51,095 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2018-01-27 23:07:51,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:07:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2018-01-27 23:07:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-01-27 23:07:51,096 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:51,096 INFO L330 BasicCegarLoop]: trace histogram [18, 16, 15, 15, 15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:07:51,097 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash 726593477, now seen corresponding path program 15 times [2018-01-27 23:07:51,097 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:51,097 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:51,098 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:51,098 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:51,098 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:51,130 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:07:51,906 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:51,906 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 [2018-01-27 23:07:51,912 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:07:51,933 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:51,953 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:51,965 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:51,982 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:51,999 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:07:52,007 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:52,013 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 302 proven. 24 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-01-27 23:07:52,219 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:52,220 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2018-01-27 23:07:52,220 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:07:52,220 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:07:52,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:07:52,221 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 22 states. [2018-01-27 23:07:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:52,889 INFO L93 Difference]: Finished difference Result 250 states and 259 transitions. [2018-01-27 23:07:52,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:07:52,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 219 [2018-01-27 23:07:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:52,890 INFO L225 Difference]: With dead ends: 250 [2018-01-27 23:07:52,891 INFO L226 Difference]: Without dead ends: 176 [2018-01-27 23:07:52,891 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:07:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-27 23:07:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-01-27 23:07:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-01-27 23:07:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2018-01-27 23:07:52,898 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 219 [2018-01-27 23:07:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:52,899 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2018-01-27 23:07:52,899 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:07:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2018-01-27 23:07:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-01-27 23:07:52,900 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:52,901 INFO L330 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 16, 16, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:07:52,901 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash 718953388, now seen corresponding path program 16 times [2018-01-27 23:07:52,901 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:52,901 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:52,902 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:52,902 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:52,902 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:52,930 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:07:54,203 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:54,203 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 [2018-01-27 23:07:54,208 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:07:54,360 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:54,365 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:07:54,428 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:54,428 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-27 23:07:54,428 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-27 23:07:54,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-27 23:07:54,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:07:54,429 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 20 states. [2018-01-27 23:07:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:54,486 INFO L93 Difference]: Finished difference Result 257 states and 265 transitions. [2018-01-27 23:07:54,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:07:54,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 230 [2018-01-27 23:07:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:54,489 INFO L225 Difference]: With dead ends: 257 [2018-01-27 23:07:54,489 INFO L226 Difference]: Without dead ends: 177 [2018-01-27 23:07:54,490 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:07:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-27 23:07:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2018-01-27 23:07:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-27 23:07:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2018-01-27 23:07:54,497 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 230 [2018-01-27 23:07:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:54,498 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2018-01-27 23:07:54,498 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-27 23:07:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2018-01-27 23:07:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-01-27 23:07:54,500 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:54,501 INFO L330 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:07:54,501 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2027387363, now seen corresponding path program 17 times [2018-01-27 23:07:54,501 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:54,501 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:54,502 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:54,502 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:54,502 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:54,529 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:07:55,347 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:55,347 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 [2018-01-27 23:07:55,351 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:07:55,367 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,374 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,375 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,377 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,379 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,381 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,384 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,388 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,394 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,403 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,419 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,467 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,500 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,608 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:55,821 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:56,455 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:07:56,458 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:07:56,465 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:07:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 296 proven. 60 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2018-01-27 23:07:57,813 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:07:57,813 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2018-01-27 23:07:57,814 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:07:57,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:07:57,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:57,814 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 26 states. [2018-01-27 23:07:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:07:58,065 INFO L93 Difference]: Finished difference Result 270 states and 282 transitions. [2018-01-27 23:07:58,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:07:58,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 235 [2018-01-27 23:07:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:07:58,067 INFO L225 Difference]: With dead ends: 270 [2018-01-27 23:07:58,067 INFO L226 Difference]: Without dead ends: 190 [2018-01-27 23:07:58,067 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:07:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-27 23:07:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2018-01-27 23:07:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-27 23:07:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2018-01-27 23:07:58,078 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 235 [2018-01-27 23:07:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:07:58,079 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2018-01-27 23:07:58,079 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:07:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2018-01-27 23:07:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-01-27 23:07:58,080 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:07:58,081 INFO L330 BasicCegarLoop]: trace histogram [21, 19, 18, 18, 18, 18, 18, 18, 18, 18, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:07:58,081 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:07:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash 945848518, now seen corresponding path program 18 times [2018-01-27 23:07:58,081 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:07:58,082 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:07:58,082 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:58,083 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:07:58,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:07:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:07:58,114 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:07:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-01-27 23:07:59,623 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:07:59,623 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 [2018-01-27 23:07:59,629 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:07:59,652 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,670 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,690 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,699 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,714 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,719 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,728 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,746 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:07:59,819 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:00,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:00,278 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:00,280 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:00,286 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 420 proven. 44 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2018-01-27 23:08:00,401 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:00,401 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2018-01-27 23:08:00,402 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:08:00,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:08:00,403 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:08:00,403 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 26 states. [2018-01-27 23:08:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:00,540 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2018-01-27 23:08:00,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:08:00,541 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 255 [2018-01-27 23:08:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:00,543 INFO L225 Difference]: With dead ends: 287 [2018-01-27 23:08:00,543 INFO L226 Difference]: Without dead ends: 202 [2018-01-27 23:08:00,544 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:08:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-27 23:08:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2018-01-27 23:08:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-01-27 23:08:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2018-01-27 23:08:00,552 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 255 [2018-01-27 23:08:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:00,553 INFO L432 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2018-01-27 23:08:00,553 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:08:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2018-01-27 23:08:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-01-27 23:08:00,555 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:00,555 INFO L330 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 19, 19, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:00,556 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash -524623363, now seen corresponding path program 19 times [2018-01-27 23:08:00,556 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:00,556 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:00,557 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:00,557 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:00,557 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:00,589 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:08:01,411 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:01,411 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 [2018-01-27 23:08:01,416 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:08:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:01,476 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:08:01,608 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:01,608 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-27 23:08:01,608 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-27 23:08:01,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-27 23:08:01,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:08:01,609 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand 23 states. [2018-01-27 23:08:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:01,678 INFO L93 Difference]: Finished difference Result 291 states and 299 transitions. [2018-01-27 23:08:01,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:08:01,679 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 266 [2018-01-27 23:08:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:01,680 INFO L225 Difference]: With dead ends: 291 [2018-01-27 23:08:01,680 INFO L226 Difference]: Without dead ends: 200 [2018-01-27 23:08:01,680 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:08:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-01-27 23:08:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-01-27 23:08:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-27 23:08:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2018-01-27 23:08:01,688 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 266 [2018-01-27 23:08:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:01,690 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2018-01-27 23:08:01,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-27 23:08:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2018-01-27 23:08:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-01-27 23:08:01,692 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:01,692 INFO L330 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:01,692 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash -472881170, now seen corresponding path program 20 times [2018-01-27 23:08:01,693 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:01,693 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:01,694 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:01,694 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:08:01,696 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:01,726 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2018-01-27 23:08:02,124 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:02,124 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 [2018-01-27 23:08:02,129 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:08:02,149 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:02,179 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:02,184 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:02,190 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 414 proven. 87 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-01-27 23:08:02,352 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:02,353 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-27 23:08:02,353 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-27 23:08:02,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-27 23:08:02,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-27 23:08:02,353 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 10 states. [2018-01-27 23:08:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:02,390 INFO L93 Difference]: Finished difference Result 298 states and 308 transitions. [2018-01-27 23:08:02,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-27 23:08:02,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 271 [2018-01-27 23:08:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:02,392 INFO L225 Difference]: With dead ends: 298 [2018-01-27 23:08:02,393 INFO L226 Difference]: Without dead ends: 208 [2018-01-27 23:08:02,393 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-27 23:08:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-01-27 23:08:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2018-01-27 23:08:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-01-27 23:08:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2018-01-27 23:08:02,402 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 271 [2018-01-27 23:08:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:02,402 INFO L432 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2018-01-27 23:08:02,403 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-27 23:08:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2018-01-27 23:08:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-01-27 23:08:02,404 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:02,405 INFO L330 BasicCegarLoop]: trace histogram [24, 21, 21, 21, 21, 21, 20, 20, 20, 20, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:02,405 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2076879132, now seen corresponding path program 21 times [2018-01-27 23:08:02,405 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:02,405 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:02,406 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:02,406 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:02,406 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:02,437 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2018-01-27 23:08:03,487 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:03,501 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 [2018-01-27 23:08:03,520 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:08:03,553 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,560 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,567 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,577 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,585 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,610 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,663 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:03,665 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:03,669 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 558 proven. 70 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2018-01-27 23:08:03,800 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:03,800 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-01-27 23:08:03,801 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:08:03,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:08:03,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:08:03,801 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand 16 states. [2018-01-27 23:08:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:03,975 INFO L93 Difference]: Finished difference Result 318 states and 329 transitions. [2018-01-27 23:08:03,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:08:03,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 286 [2018-01-27 23:08:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:03,977 INFO L225 Difference]: With dead ends: 318 [2018-01-27 23:08:03,977 INFO L226 Difference]: Without dead ends: 223 [2018-01-27 23:08:03,978 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:08:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-01-27 23:08:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2018-01-27 23:08:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-27 23:08:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2018-01-27 23:08:03,985 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 286 [2018-01-27 23:08:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:03,986 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2018-01-27 23:08:03,986 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:08:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2018-01-27 23:08:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-01-27 23:08:03,988 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:03,988 INFO L330 BasicCegarLoop]: trace histogram [27, 24, 24, 24, 24, 21, 20, 20, 20, 20, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:03,988 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash -440146314, now seen corresponding path program 22 times [2018-01-27 23:08:03,989 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:03,989 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:03,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:03,990 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:03,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:04,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-01-27 23:08:04,792 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:04,792 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 [2018-01-27 23:08:04,798 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:08:05,030 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:05,036 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 710 proven. 156 refuted. 0 times theorem prover too weak. 1768 trivial. 0 not checked. [2018-01-27 23:08:05,133 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:05,133 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-27 23:08:05,133 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-27 23:08:05,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-27 23:08:05,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:08:05,134 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand 12 states. [2018-01-27 23:08:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:05,184 INFO L93 Difference]: Finished difference Result 330 states and 340 transitions. [2018-01-27 23:08:05,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:08:05,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 307 [2018-01-27 23:08:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:05,188 INFO L225 Difference]: With dead ends: 330 [2018-01-27 23:08:05,188 INFO L226 Difference]: Without dead ends: 224 [2018-01-27 23:08:05,189 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:08:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-01-27 23:08:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2018-01-27 23:08:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-01-27 23:08:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2018-01-27 23:08:05,198 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 307 [2018-01-27 23:08:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:05,199 INFO L432 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2018-01-27 23:08:05,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-27 23:08:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2018-01-27 23:08:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-01-27 23:08:05,201 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:05,202 INFO L330 BasicCegarLoop]: trace histogram [30, 27, 27, 27, 27, 21, 20, 20, 20, 20, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:05,202 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1269778724, now seen corresponding path program 23 times [2018-01-27 23:08:05,202 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:05,202 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:05,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:05,203 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:05,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:05,235 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 0 proven. 1090 refuted. 0 times theorem prover too weak. 1937 trivial. 0 not checked. [2018-01-27 23:08:06,134 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:06,135 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:06,139 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:08:06,160 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,175 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,187 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,189 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,191 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,194 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,199 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,210 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,219 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,230 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,238 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,254 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,266 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,284 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,310 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,349 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:06,580 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:07,055 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:07,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:09,770 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:09,773 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:09,780 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 888 proven. 198 refuted. 0 times theorem prover too weak. 1941 trivial. 0 not checked. [2018-01-27 23:08:09,966 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:09,967 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-01-27 23:08:09,967 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-27 23:08:09,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-27 23:08:09,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-27 23:08:09,967 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand 13 states. [2018-01-27 23:08:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:10,458 INFO L93 Difference]: Finished difference Result 340 states and 350 transitions. [2018-01-27 23:08:10,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-27 23:08:10,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 322 [2018-01-27 23:08:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:10,461 INFO L225 Difference]: With dead ends: 340 [2018-01-27 23:08:10,461 INFO L226 Difference]: Without dead ends: 229 [2018-01-27 23:08:10,462 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-27 23:08:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-01-27 23:08:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2018-01-27 23:08:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-01-27 23:08:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2018-01-27 23:08:10,468 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 322 [2018-01-27 23:08:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:10,469 INFO L432 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2018-01-27 23:08:10,469 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-27 23:08:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2018-01-27 23:08:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-01-27 23:08:10,471 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:10,471 INFO L330 BasicCegarLoop]: trace histogram [33, 30, 30, 30, 30, 21, 20, 20, 20, 20, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:10,471 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash -797714122, now seen corresponding path program 24 times [2018-01-27 23:08:10,472 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:10,472 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:10,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:10,473 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:10,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:10,500 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3465 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2130 trivial. 0 not checked. [2018-01-27 23:08:11,087 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:11,087 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:11,094 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:08:11,124 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,138 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,171 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,187 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,197 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,206 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,213 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,233 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,285 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,386 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,407 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,529 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:11,759 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:12,395 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:12,397 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:12,403 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3465 backedges. 1189 proven. 102 refuted. 0 times theorem prover too weak. 2174 trivial. 0 not checked. [2018-01-27 23:08:12,753 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:12,753 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2018-01-27 23:08:12,753 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:08:12,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:08:12,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:08:12,754 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand 22 states. [2018-01-27 23:08:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:12,978 INFO L93 Difference]: Finished difference Result 360 states and 371 transitions. [2018-01-27 23:08:12,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:08:12,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2018-01-27 23:08:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:12,979 INFO L225 Difference]: With dead ends: 360 [2018-01-27 23:08:12,979 INFO L226 Difference]: Without dead ends: 244 [2018-01-27 23:08:12,980 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-01-27 23:08:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-27 23:08:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2018-01-27 23:08:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-01-27 23:08:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 241 transitions. [2018-01-27 23:08:12,986 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 241 transitions. Word has length 337 [2018-01-27 23:08:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:12,986 INFO L432 AbstractCegarLoop]: Abstraction has 237 states and 241 transitions. [2018-01-27 23:08:12,986 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:08:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 241 transitions. [2018-01-27 23:08:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-01-27 23:08:12,988 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:12,988 INFO L330 BasicCegarLoop]: trace histogram [36, 33, 33, 33, 33, 21, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:12,988 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:12,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1812066516, now seen corresponding path program 25 times [2018-01-27 23:08:12,988 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:12,988 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:12,989 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:12,989 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:12,989 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:13,027 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3986 backedges. 0 proven. 1605 refuted. 0 times theorem prover too weak. 2381 trivial. 0 not checked. [2018-01-27 23:08:13,406 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:13,406 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:13,412 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:08:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:13,481 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3986 backedges. 1304 proven. 297 refuted. 0 times theorem prover too weak. 2385 trivial. 0 not checked. [2018-01-27 23:08:13,561 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:13,561 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-01-27 23:08:13,562 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-27 23:08:13,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-27 23:08:13,562 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-27 23:08:13,562 INFO L87 Difference]: Start difference. First operand 237 states and 241 transitions. Second operand 15 states. [2018-01-27 23:08:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:13,656 INFO L93 Difference]: Finished difference Result 372 states and 382 transitions. [2018-01-27 23:08:13,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-27 23:08:13,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 358 [2018-01-27 23:08:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:13,658 INFO L225 Difference]: With dead ends: 372 [2018-01-27 23:08:13,658 INFO L226 Difference]: Without dead ends: 245 [2018-01-27 23:08:13,659 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-27 23:08:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-01-27 23:08:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2018-01-27 23:08:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-01-27 23:08:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2018-01-27 23:08:13,671 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 358 [2018-01-27 23:08:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:13,672 INFO L432 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2018-01-27 23:08:13,672 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-27 23:08:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2018-01-27 23:08:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-01-27 23:08:13,675 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:13,675 INFO L330 BasicCegarLoop]: trace histogram [39, 36, 36, 36, 36, 21, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:13,676 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2114560958, now seen corresponding path program 26 times [2018-01-27 23:08:13,676 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:13,676 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:13,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:13,677 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:08:13,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:13,724 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 2614 trivial. 0 not checked. [2018-01-27 23:08:14,293 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:14,293 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:14,299 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:08:14,321 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:14,360 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:14,366 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:14,372 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 1542 proven. 354 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-01-27 23:08:14,582 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:14,583 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-01-27 23:08:14,583 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:08:14,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:08:14,583 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:08:14,583 INFO L87 Difference]: Start difference. First operand 242 states and 246 transitions. Second operand 16 states. [2018-01-27 23:08:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:14,633 INFO L93 Difference]: Finished difference Result 382 states and 392 transitions. [2018-01-27 23:08:14,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-27 23:08:14,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 373 [2018-01-27 23:08:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:14,636 INFO L225 Difference]: With dead ends: 382 [2018-01-27 23:08:14,636 INFO L226 Difference]: Without dead ends: 250 [2018-01-27 23:08:14,636 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:08:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-01-27 23:08:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2018-01-27 23:08:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-27 23:08:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2018-01-27 23:08:14,648 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 373 [2018-01-27 23:08:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:14,649 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2018-01-27 23:08:14,649 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:08:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2018-01-27 23:08:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-01-27 23:08:14,652 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:14,652 INFO L330 BasicCegarLoop]: trace histogram [42, 39, 39, 39, 39, 21, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:14,652 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:14,652 INFO L82 PathProgramCache]: Analyzing trace with hash 405240596, now seen corresponding path program 27 times [2018-01-27 23:08:14,652 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:14,653 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:14,654 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:14,654 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:14,654 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:14,687 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5087 backedges. 0 proven. 2220 refuted. 0 times theorem prover too weak. 2867 trivial. 0 not checked. [2018-01-27 23:08:16,071 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:16,071 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:16,077 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:08:16,101 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,106 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,111 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,118 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,124 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,149 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,184 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,221 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,248 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:16,250 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:16,254 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5087 backedges. 1806 proven. 140 refuted. 0 times theorem prover too weak. 3141 trivial. 0 not checked. [2018-01-27 23:08:16,695 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:16,695 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2018-01-27 23:08:16,696 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-27 23:08:16,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-27 23:08:16,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:08:16,696 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand 24 states. [2018-01-27 23:08:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:16,789 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2018-01-27 23:08:16,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-27 23:08:16,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 388 [2018-01-27 23:08:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:16,791 INFO L225 Difference]: With dead ends: 402 [2018-01-27 23:08:16,791 INFO L226 Difference]: Without dead ends: 265 [2018-01-27 23:08:16,792 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:08:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-01-27 23:08:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 258. [2018-01-27 23:08:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-01-27 23:08:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2018-01-27 23:08:16,801 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 388 [2018-01-27 23:08:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:16,802 INFO L432 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2018-01-27 23:08:16,802 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-27 23:08:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2018-01-27 23:08:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-01-27 23:08:16,804 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:16,805 INFO L330 BasicCegarLoop]: trace histogram [45, 42, 42, 42, 42, 21, 20, 20, 20, 20, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:16,805 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1711371334, now seen corresponding path program 28 times [2018-01-27 23:08:16,805 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:16,805 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:16,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:16,808 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:16,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:16,844 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 0 proven. 2565 refuted. 0 times theorem prover too weak. 3184 trivial. 0 not checked. [2018-01-27 23:08:17,672 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:17,672 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-27 23:08:17,688 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:17,952 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:17,958 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 2078 proven. 483 refuted. 0 times theorem prover too weak. 3188 trivial. 0 not checked. [2018-01-27 23:08:18,100 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:18,101 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-27 23:08:18,101 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:08:18,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:08:18,102 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:08:18,102 INFO L87 Difference]: Start difference. First operand 258 states and 262 transitions. Second operand 18 states. [2018-01-27 23:08:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:18,197 INFO L93 Difference]: Finished difference Result 414 states and 424 transitions. [2018-01-27 23:08:18,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 23:08:18,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 409 [2018-01-27 23:08:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:18,199 INFO L225 Difference]: With dead ends: 414 [2018-01-27 23:08:18,199 INFO L226 Difference]: Without dead ends: 266 [2018-01-27 23:08:18,199 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:08:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-01-27 23:08:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2018-01-27 23:08:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-01-27 23:08:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 267 transitions. [2018-01-27 23:08:18,207 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 267 transitions. Word has length 409 [2018-01-27 23:08:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:18,208 INFO L432 AbstractCegarLoop]: Abstraction has 263 states and 267 transitions. [2018-01-27 23:08:18,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:08:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 267 transitions. [2018-01-27 23:08:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-01-27 23:08:18,211 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:18,212 INFO L330 BasicCegarLoop]: trace histogram [48, 45, 45, 45, 45, 21, 20, 20, 20, 20, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:18,212 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1464617228, now seen corresponding path program 29 times [2018-01-27 23:08:18,212 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:18,212 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:18,213 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:18,213 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:18,213 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:18,249 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6412 backedges. 0 proven. 2935 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2018-01-27 23:08:18,920 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:18,998 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:19,006 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:08:19,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,039 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,052 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,065 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,069 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,070 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,071 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,072 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,074 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,075 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,079 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,083 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,086 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,089 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,093 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,101 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,117 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,128 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,138 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,163 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,220 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,257 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,295 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,420 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:19,756 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:20,260 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:21,252 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:22,032 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:22,566 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:23,772 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:25,283 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:25,288 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:25,299 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6412 backedges. 2376 proven. 555 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2018-01-27 23:08:25,405 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:25,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-01-27 23:08:25,406 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 23:08:25,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 23:08:25,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:08:25,406 INFO L87 Difference]: Start difference. First operand 263 states and 267 transitions. Second operand 19 states. [2018-01-27 23:08:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:25,456 INFO L93 Difference]: Finished difference Result 424 states and 434 transitions. [2018-01-27 23:08:25,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 23:08:25,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 424 [2018-01-27 23:08:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:25,458 INFO L225 Difference]: With dead ends: 424 [2018-01-27 23:08:25,458 INFO L226 Difference]: Without dead ends: 271 [2018-01-27 23:08:25,458 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:08:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-01-27 23:08:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2018-01-27 23:08:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-01-27 23:08:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 272 transitions. [2018-01-27 23:08:25,466 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 272 transitions. Word has length 424 [2018-01-27 23:08:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:25,467 INFO L432 AbstractCegarLoop]: Abstraction has 268 states and 272 transitions. [2018-01-27 23:08:25,467 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 23:08:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 272 transitions. [2018-01-27 23:08:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-01-27 23:08:25,470 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:25,470 INFO L330 BasicCegarLoop]: trace histogram [51, 48, 48, 48, 48, 21, 20, 20, 20, 20, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:25,470 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1574667014, now seen corresponding path program 30 times [2018-01-27 23:08:25,471 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:25,471 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:25,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:25,472 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:25,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:25,506 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 0 proven. 3330 refuted. 0 times theorem prover too weak. 3790 trivial. 0 not checked. [2018-01-27 23:08:26,438 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:26,439 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:26,443 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:08:26,468 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,471 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,475 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,478 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,481 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,491 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,495 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,517 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,528 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,537 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,546 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,561 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,573 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,585 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,600 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,620 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,642 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:08:26,643 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:26,648 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 2700 proven. 184 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2018-01-27 23:08:27,344 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:27,345 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2018-01-27 23:08:27,345 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-27 23:08:27,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-27 23:08:27,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-01-27 23:08:27,346 INFO L87 Difference]: Start difference. First operand 268 states and 272 transitions. Second operand 28 states. [2018-01-27 23:08:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:27,487 INFO L93 Difference]: Finished difference Result 444 states and 455 transitions. [2018-01-27 23:08:27,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-27 23:08:27,487 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 439 [2018-01-27 23:08:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:27,489 INFO L225 Difference]: With dead ends: 444 [2018-01-27 23:08:27,489 INFO L226 Difference]: Without dead ends: 286 [2018-01-27 23:08:27,490 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-01-27 23:08:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-01-27 23:08:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2018-01-27 23:08:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-01-27 23:08:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 283 transitions. [2018-01-27 23:08:27,498 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 283 transitions. Word has length 439 [2018-01-27 23:08:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:27,498 INFO L432 AbstractCegarLoop]: Abstraction has 279 states and 283 transitions. [2018-01-27 23:08:27,499 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-27 23:08:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 283 transitions. [2018-01-27 23:08:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2018-01-27 23:08:27,502 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:27,502 INFO L330 BasicCegarLoop]: trace histogram [54, 51, 51, 51, 51, 21, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:27,502 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1785106172, now seen corresponding path program 31 times [2018-01-27 23:08:27,503 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:27,503 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:27,503 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:27,504 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:27,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:27,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 0 proven. 3750 refuted. 0 times theorem prover too weak. 4173 trivial. 0 not checked. [2018-01-27 23:08:28,451 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:28,451 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:28,456 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:08:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:28,547 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 3032 proven. 714 refuted. 0 times theorem prover too weak. 4177 trivial. 0 not checked. [2018-01-27 23:08:28,797 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:28,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-01-27 23:08:28,798 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-27 23:08:28,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-27 23:08:28,799 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-27 23:08:28,799 INFO L87 Difference]: Start difference. First operand 279 states and 283 transitions. Second operand 21 states. [2018-01-27 23:08:28,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:28,976 INFO L93 Difference]: Finished difference Result 456 states and 466 transitions. [2018-01-27 23:08:29,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-27 23:08:29,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 460 [2018-01-27 23:08:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:29,042 INFO L225 Difference]: With dead ends: 456 [2018-01-27 23:08:29,042 INFO L226 Difference]: Without dead ends: 287 [2018-01-27 23:08:29,043 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-27 23:08:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-01-27 23:08:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2018-01-27 23:08:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-01-27 23:08:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2018-01-27 23:08:29,054 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 460 [2018-01-27 23:08:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:29,054 INFO L432 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2018-01-27 23:08:29,055 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-27 23:08:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2018-01-27 23:08:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-01-27 23:08:29,058 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:29,058 INFO L330 BasicCegarLoop]: trace histogram [57, 54, 54, 54, 54, 21, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:29,058 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:29,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1835753586, now seen corresponding path program 32 times [2018-01-27 23:08:29,059 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:29,059 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:29,059 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:29,060 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:08:29,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:29,098 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8721 backedges. 0 proven. 4195 refuted. 0 times theorem prover too weak. 4526 trivial. 0 not checked. [2018-01-27 23:08:29,792 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:29,792 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:08:29,797 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:08:29,823 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:29,873 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:08:29,881 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:29,886 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8721 backedges. 3390 proven. 801 refuted. 0 times theorem prover too weak. 4530 trivial. 0 not checked. [2018-01-27 23:08:30,088 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:08:30,088 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-01-27 23:08:30,089 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:08:30,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:08:30,089 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:08:30,090 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand 22 states. [2018-01-27 23:08:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:08:30,735 INFO L93 Difference]: Finished difference Result 466 states and 476 transitions. [2018-01-27 23:08:30,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-27 23:08:30,735 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 475 [2018-01-27 23:08:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:08:30,737 INFO L225 Difference]: With dead ends: 466 [2018-01-27 23:08:30,737 INFO L226 Difference]: Without dead ends: 292 [2018-01-27 23:08:30,738 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:08:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-01-27 23:08:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2018-01-27 23:08:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-01-27 23:08:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 293 transitions. [2018-01-27 23:08:30,747 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 293 transitions. Word has length 475 [2018-01-27 23:08:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:08:30,747 INFO L432 AbstractCegarLoop]: Abstraction has 289 states and 293 transitions. [2018-01-27 23:08:30,747 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:08:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 293 transitions. [2018-01-27 23:08:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2018-01-27 23:08:30,750 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:08:30,751 INFO L330 BasicCegarLoop]: trace histogram [60, 57, 57, 57, 57, 21, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 3, 3, 3, 3, 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, 1, 1] [2018-01-27 23:08:30,751 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:08:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 903208772, now seen corresponding path program 33 times [2018-01-27 23:08:30,751 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:08:30,751 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:08:30,752 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:30,752 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:08:30,752 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:08:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:08:30,792 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:08:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9564 backedges. 0 proven. 4665 refuted. 0 times theorem prover too weak. 4899 trivial. 0 not checked. [2018-01-27 23:08:32,048 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:08:32,048 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 Received shutdown request... [2018-01-27 23:08:32,054 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:08:32,082 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,087 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,092 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,097 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,112 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,134 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,155 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,270 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,368 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,512 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,852 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:08:32,854 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:08:32,860 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:08:32,869 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-27 23:08:32,870 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-27 23:08:32,872 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:08:32,872 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:08:32,872 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:08:32,873 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:08:32,873 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:08:32,873 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:08:32,873 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:08:32,873 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == sumErr0EnsuresViolation======== [2018-01-27 23:08:32,873 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:08:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:08:32,874 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-27 23:08:32,875 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:08:32,880 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:08:32,880 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:08:32,880 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:08:32,880 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:08:32,880 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:08:32,880 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:08:32,880 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-27 23:08:32,881 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:08:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:08:32,882 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-27 23:08:32,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:08:32 BoogieIcfgContainer [2018-01-27 23:08:32,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-27 23:08:32,884 INFO L168 Benchmark]: Toolchain (without parser) took 54914.00 ms. Allocated memory was 308.3 MB in the beginning and 1.1 GB in the end (delta: 833.6 MB). Free memory was 269.2 MB in the beginning and 725.9 MB in the end (delta: -456.7 MB). Peak memory consumption was 376.9 MB. Max. memory is 5.3 GB. [2018-01-27 23:08:32,886 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 308.3 MB. Free memory is still 273.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-27 23:08:32,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.19 ms. Allocated memory is still 308.3 MB. Free memory was 267.2 MB in the beginning and 259.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:08:32,886 INFO L168 Benchmark]: Boogie Preprocessor took 43.15 ms. Allocated memory is still 308.3 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:08:32,887 INFO L168 Benchmark]: RCFGBuilder took 578.52 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 240.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:08:32,887 INFO L168 Benchmark]: TraceAbstraction took 53973.92 ms. Allocated memory was 308.3 MB in the beginning and 1.1 GB in the end (delta: 833.6 MB). Free memory was 240.2 MB in the beginning and 725.9 MB in the end (delta: -485.7 MB). Peak memory consumption was 348.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:08:32,891 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 308.3 MB. Free memory is still 273.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 301.19 ms. Allocated memory is still 308.3 MB. Free memory was 267.2 MB in the beginning and 259.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 43.15 ms. Allocated memory is still 308.3 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 578.52 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 240.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 53973.92 ms. Allocated memory was 308.3 MB in the beginning and 1.1 GB in the end (delta: 833.6 MB). Free memory was 240.2 MB in the beginning and 725.9 MB in the end (delta: -485.7 MB). Peak memory consumption was 348.0 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, 54 locations, 4 error locations. UNSAFE Result, 0.2s 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=54occurred 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, 0.0s DumpTime, 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, ReuseStatistics: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 491 with TraceHistMax 60, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 54 locations, 4 error locations. TIMEOUT Result, 53.6s OverallTime, 37 OverallIterations, 60 TraceHistogramMax, 5.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1790 SDtfs, 1445 SDslu, 16185 SDs, 0 SdLazy, 2571 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8550 GetRequests, 8076 SyntacticMatches, 0 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 18.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=289occurred in iteration=36, 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 36 MinimizatonAttempts, 150 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 16.2s SatisfiabilityAnalysisTime, 25.8s InterpolantComputationTime, 16414 NumberOfCodeBlocks, 15271 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 16345 ConstructedInterpolants, 0 QuantifiedInterpolants, 6781181 SizeOfPredicates, 34 NumberOfNonLiveVariables, 12714 ConjunctsInSsa, 353 ConjunctsInUnsatCore, 69 InterpolantComputations, 4 PerfectInterpolantSequences, 113933/154342 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 4). Cancelled while IsEmpty was searching accepting run (input had 54 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: sumErr0EnsuresViolation CFG has 4 procedures, 54 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=54occurred 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, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 15). Cancelled while IsEmpty was searching accepting run (input had 54 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 54 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=54occurred 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, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: 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/sum20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-27_23-08-32-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-27_23-08-32-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-27_23-08-32-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-27_23-08-32-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-27_23-08-32-911.csv Completed graceful shutdown