java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:41:50,504 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:41:50,506 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:41:50,521 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:41:50,521 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:41:50,522 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:41:50,523 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:41:50,525 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:41:50,526 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:41:50,527 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:41:50,528 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:41:50,529 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:41:50,529 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:41:50,531 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:41:50,532 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:41:50,534 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:41:50,536 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:41:50,539 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:41:50,540 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:41:50,541 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:41:50,543 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:41:50,544 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:41:50,544 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:41:50,545 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:41:50,546 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:41:50,547 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:41:50,548 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:41:50,548 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:41:50,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:41:50,549 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:41:50,549 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:41:50,550 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:41:50,558 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:41:50,558 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:41:50,559 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:41:50,559 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:41:50,559 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:41:50,559 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:41:50,560 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:41:50,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:41:50,560 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:41:50,560 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:41:50,560 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:41:50,560 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:41:50,561 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:41:50,562 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:41:50,562 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:41:50,562 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:41:50,562 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:41:50,562 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:41:50,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:41:50,563 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:41:50,563 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:41:50,563 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:41:50,563 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:41:50,563 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:41:50,563 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:41:50,564 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:41:50,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:41:50,564 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:41:50,564 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:41:50,565 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:41:50,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:41:50,608 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:41:50,611 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:41:50,612 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:41:50,612 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:41:50,613 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-01-23 14:41:50,737 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:41:50,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:41:50,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:41:50,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:41:50,748 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:41:50,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290110cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50, skipping insertion in model container [2018-01-23 14:41:50,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,767 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:41:50,781 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:41:50,893 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:41:50,910 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:41:50,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50 WrapperNode [2018-01-23 14:41:50,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:41:50,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:41:50,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:41:50,917 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:41:50,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... [2018-01-23 14:41:50,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:41:50,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:41:50,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:41:50,945 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:41:50,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:41:50,993 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:41:50,993 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:41:50,994 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:41:50,994 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:41:50,994 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:41:50,994 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:41:50,994 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:41:50,995 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:41:50,995 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:41:50,995 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:41:50,995 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:41:50,995 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:41:50,995 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:41:51,183 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:41:51,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:41:51 BoogieIcfgContainer [2018-01-23 14:41:51,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:41:51,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:41:51,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:41:51,187 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:41:51,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:41:50" (1/3) ... [2018-01-23 14:41:51,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b3ecbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:41:51, skipping insertion in model container [2018-01-23 14:41:51,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:41:50" (2/3) ... [2018-01-23 14:41:51,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b3ecbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:41:51, skipping insertion in model container [2018-01-23 14:41:51,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:41:51" (3/3) ... [2018-01-23 14:41:51,192 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-01-23 14:41:51,200 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:41:51,207 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:41:51,255 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:41:51,255 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:41:51,255 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:41:51,255 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:41:51,256 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:41:51,256 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:41:51,256 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:41:51,256 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:41:51,257 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:41:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:41:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:41:51,281 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:51,282 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:41:51,282 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:41:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-23 14:41:51,287 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:51,287 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:51,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,328 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:51,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:41:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:41:51,382 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:41:51,388 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:41:51,395 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:41:51,395 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:41:51,395 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:41:51,395 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:41:51,395 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:41:51,396 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:41:51,396 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:41:51,396 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:41:51,396 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:41:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:41:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:41:51,400 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:51,400 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:51,400 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:41:51,400 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-23 14:41:51,401 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:51,401 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:51,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,402 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:51,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:51,429 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:51,462 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:41:51,463 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:41:51,464 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:41:51,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:41:51,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:41:51,476 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:41:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:51,499 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:41:51,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:41:51,500 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-23 14:41:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:51,506 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:41:51,506 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:41:51,510 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:41:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:41:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:41:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:41:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:41:51,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-23 14:41:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:51,605 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:41:51,605 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:41:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:41:51,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:41:51,608 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:41:51,609 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:41:51,609 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:41:51,609 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:41:51,609 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:41:51,609 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:41:51,609 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:41:51,609 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:41:51,610 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:41:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:41:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:41:51,613 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:51,613 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:51,613 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-23 14:41:51,614 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:51,614 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:51,615 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,615 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:51,615 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:51,625 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:51,639 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:41:51,639 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:41:51,639 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:41:51,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:41:51,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:41:51,639 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:41:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:51,646 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:41:51,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:41:51,646 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-23 14:41:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:51,648 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:41:51,648 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:41:51,649 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:41:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:41:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:41:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:41:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-23 14:41:51,660 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-23 14:41:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:51,661 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-23 14:41:51,661 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:41:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-23 14:41:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:41:51,662 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:51,662 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:51,662 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:51,662 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-23 14:41:51,662 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:51,662 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:51,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,663 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:51,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:51,677 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:51,715 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:41:51,715 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:41:51,716 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:41:51,716 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:41:51,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:41:51,717 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-23 14:41:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:51,770 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-23 14:41:51,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:41:51,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-23 14:41:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:51,773 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:41:51,773 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:41:51,774 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:41:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:41:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-23 14:41:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:41:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-23 14:41:51,784 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-23 14:41:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:51,784 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-23 14:41:51,784 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:41:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-23 14:41:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:41:51,785 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:51,785 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:51,785 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-23 14:41:51,785 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:51,785 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:51,786 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,786 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:51,786 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:51,808 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:51,941 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:41:51,941 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:41:51,942 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:41:51,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:41:51,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:41:51,942 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2018-01-23 14:41:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:52,011 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-01-23 14:41:52,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:41:52,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-01-23 14:41:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:52,013 INFO L225 Difference]: With dead ends: 80 [2018-01-23 14:41:52,014 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:41:52,014 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:41:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:41:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-01-23 14:41:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:41:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-23 14:41:52,020 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2018-01-23 14:41:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:52,021 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-23 14:41:52,021 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:41:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-23 14:41:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:41:52,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:52,022 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:52,022 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-23 14:41:52,022 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:52,022 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:52,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:52,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:52,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:52,036 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:52,144 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:52,144 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:52,155 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:52,179 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:52,330 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:52,330 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:41:52,330 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:41:52,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:41:52,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:41:52,331 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2018-01-23 14:41:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:52,470 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2018-01-23 14:41:52,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:41:52,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-01-23 14:41:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:52,472 INFO L225 Difference]: With dead ends: 87 [2018-01-23 14:41:52,472 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:41:52,473 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:41:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:41:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-01-23 14:41:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:41:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-01-23 14:41:52,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 36 [2018-01-23 14:41:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:52,481 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-01-23 14:41:52,481 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:41:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-01-23 14:41:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:41:52,483 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:52,483 INFO L322 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:52,483 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -524554428, now seen corresponding path program 2 times [2018-01-23 14:41:52,484 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:52,484 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:52,485 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:52,485 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:52,486 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:52,505 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:52,663 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:52,663 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:52,677 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:41:52,691 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:52,703 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:52,704 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:52,707 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:52,778 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:52,856 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:41:52,857 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:41:52,857 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:41:52,857 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:41:52,857 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 10 states. [2018-01-23 14:41:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:53,022 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2018-01-23 14:41:53,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:41:53,023 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2018-01-23 14:41:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:53,024 INFO L225 Difference]: With dead ends: 97 [2018-01-23 14:41:53,024 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:41:53,025 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:41:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:41:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-01-23 14:41:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:41:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-01-23 14:41:53,032 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 41 [2018-01-23 14:41:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:53,032 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-01-23 14:41:53,032 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:41:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-01-23 14:41:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:41:53,034 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:53,034 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:53,034 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -438141712, now seen corresponding path program 3 times [2018-01-23 14:41:53,035 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:53,035 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:53,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:53,036 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:53,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:53,056 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:41:53,244 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:53,244 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:53,250 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:41:53,259 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:41:53,262 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:41:53,263 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:53,266 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-01-23 14:41:53,303 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:53,303 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-01-23 14:41:53,304 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:41:53,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:41:53,304 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:41:53,304 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 9 states. [2018-01-23 14:41:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:53,421 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2018-01-23 14:41:53,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:41:53,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2018-01-23 14:41:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:53,422 INFO L225 Difference]: With dead ends: 131 [2018-01-23 14:41:53,423 INFO L226 Difference]: Without dead ends: 85 [2018-01-23 14:41:53,423 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:41:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-23 14:41:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2018-01-23 14:41:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:41:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-01-23 14:41:53,430 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 46 [2018-01-23 14:41:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:53,430 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-01-23 14:41:53,430 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:41:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-01-23 14:41:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-23 14:41:53,433 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:53,434 INFO L322 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:53,434 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash 515188947, now seen corresponding path program 4 times [2018-01-23 14:41:53,434 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:53,434 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:53,435 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:53,435 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:53,435 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:53,456 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 5 proven. 139 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-01-23 14:41:53,718 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:53,718 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:53,724 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:41:53,748 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:53,751 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-01-23 14:41:53,847 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:53,847 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:41:53,848 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:41:53,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:41:53,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:41:53,849 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 14 states. [2018-01-23 14:41:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:54,122 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2018-01-23 14:41:54,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:41:54,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2018-01-23 14:41:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:54,124 INFO L225 Difference]: With dead ends: 134 [2018-01-23 14:41:54,124 INFO L226 Difference]: Without dead ends: 75 [2018-01-23 14:41:54,125 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:41:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-23 14:41:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2018-01-23 14:41:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-23 14:41:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2018-01-23 14:41:54,132 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 82 [2018-01-23 14:41:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:54,133 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2018-01-23 14:41:54,133 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:41:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2018-01-23 14:41:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-23 14:41:54,135 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:54,135 INFO L322 BasicCegarLoop]: trace histogram [12, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:54,135 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -611097235, now seen corresponding path program 5 times [2018-01-23 14:41:54,136 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:54,136 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:54,137 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:54,137 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:54,137 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:54,158 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 5 proven. 210 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-01-23 14:41:54,410 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:54,410 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:54,417 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:41:54,426 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:54,429 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:54,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:54,434 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:54,440 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:54,445 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:54,446 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:54,450 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 156 proven. 60 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-01-23 14:41:54,571 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:54,571 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:41:54,572 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:41:54,572 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:41:54,572 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:41:54,572 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 16 states. [2018-01-23 14:41:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:54,779 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2018-01-23 14:41:54,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:41:54,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2018-01-23 14:41:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:54,781 INFO L225 Difference]: With dead ends: 144 [2018-01-23 14:41:54,781 INFO L226 Difference]: Without dead ends: 80 [2018-01-23 14:41:54,782 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:41:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-23 14:41:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2018-01-23 14:41:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-23 14:41:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2018-01-23 14:41:54,790 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 92 [2018-01-23 14:41:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:54,791 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2018-01-23 14:41:54,791 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:41:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2018-01-23 14:41:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-23 14:41:54,793 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:54,794 INFO L322 BasicCegarLoop]: trace histogram [14, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:54,794 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -556985837, now seen corresponding path program 6 times [2018-01-23 14:41:54,794 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:54,794 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:54,795 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:54,796 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:54,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:54,820 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 5 proven. 296 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-01-23 14:41:55,041 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:55,041 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:55,046 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:41:55,056 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:41:55,057 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:41:55,060 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:41:55,063 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:41:55,067 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:41:55,068 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:55,072 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-01-23 14:41:55,134 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:55,134 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2018-01-23 14:41:55,134 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-23 14:41:55,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-23 14:41:55,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:41:55,135 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 13 states. [2018-01-23 14:41:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:55,255 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2018-01-23 14:41:55,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:41:55,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2018-01-23 14:41:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:55,257 INFO L225 Difference]: With dead ends: 183 [2018-01-23 14:41:55,257 INFO L226 Difference]: Without dead ends: 114 [2018-01-23 14:41:55,258 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:41:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-23 14:41:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2018-01-23 14:41:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-23 14:41:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2018-01-23 14:41:55,268 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 102 [2018-01-23 14:41:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:55,269 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2018-01-23 14:41:55,269 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-23 14:41:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2018-01-23 14:41:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-01-23 14:41:55,271 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:55,271 INFO L322 BasicCegarLoop]: trace histogram [24, 21, 21, 21, 21, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:55,271 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash 294495146, now seen corresponding path program 7 times [2018-01-23 14:41:55,272 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:55,272 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:55,272 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:55,273 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:55,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:55,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 8 proven. 675 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-01-23 14:41:55,846 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:55,846 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:55,856 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:55,909 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 566 proven. 119 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2018-01-23 14:41:56,128 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:56,128 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:41:56,129 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:41:56,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:41:56,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:41:56,129 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 20 states. [2018-01-23 14:41:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:56,408 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2018-01-23 14:41:56,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:41:56,413 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 158 [2018-01-23 14:41:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:56,415 INFO L225 Difference]: With dead ends: 182 [2018-01-23 14:41:56,415 INFO L226 Difference]: Without dead ends: 99 [2018-01-23 14:41:56,416 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:41:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-23 14:41:56,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2018-01-23 14:41:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-23 14:41:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2018-01-23 14:41:56,426 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 158 [2018-01-23 14:41:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:56,426 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2018-01-23 14:41:56,426 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:41:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2018-01-23 14:41:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-23 14:41:56,429 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:56,429 INFO L322 BasicCegarLoop]: trace histogram [27, 24, 24, 24, 24, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:56,429 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1051815268, now seen corresponding path program 8 times [2018-01-23 14:41:56,429 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:56,429 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:56,430 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:56,430 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:41:56,430 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:56,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 8 proven. 870 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-01-23 14:41:56,764 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:56,764 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:56,768 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:41:56,779 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:56,793 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:56,796 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:56,799 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 724 proven. 156 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-01-23 14:41:56,952 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:56,953 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:41:56,953 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:41:56,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:41:56,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:41:56,954 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 22 states. [2018-01-23 14:41:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:57,177 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2018-01-23 14:41:57,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:41:57,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 173 [2018-01-23 14:41:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:57,179 INFO L225 Difference]: With dead ends: 192 [2018-01-23 14:41:57,179 INFO L226 Difference]: Without dead ends: 104 [2018-01-23 14:41:57,180 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:41:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-01-23 14:41:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2018-01-23 14:41:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-23 14:41:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2018-01-23 14:41:57,188 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 173 [2018-01-23 14:41:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:57,188 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2018-01-23 14:41:57,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:41:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2018-01-23 14:41:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-01-23 14:41:57,191 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:57,191 INFO L322 BasicCegarLoop]: trace histogram [30, 27, 27, 27, 27, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:57,191 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1142155370, now seen corresponding path program 9 times [2018-01-23 14:41:57,191 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:57,191 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:57,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:57,192 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:57,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:57,215 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 8 proven. 1090 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2018-01-23 14:41:57,526 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:57,526 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:57,531 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:41:57,543 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:41:57,545 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:41:57,548 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:41:57,551 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:41:57,552 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:57,555 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2018-01-23 14:41:57,614 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:57,615 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2018-01-23 14:41:57,615 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-23 14:41:57,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-23 14:41:57,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:41:57,615 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 17 states. [2018-01-23 14:41:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:57,741 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2018-01-23 14:41:57,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:41:57,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 188 [2018-01-23 14:41:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:57,742 INFO L225 Difference]: With dead ends: 236 [2018-01-23 14:41:57,742 INFO L226 Difference]: Without dead ends: 143 [2018-01-23 14:41:57,743 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:41:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-23 14:41:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2018-01-23 14:41:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-23 14:41:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2018-01-23 14:41:57,751 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 188 [2018-01-23 14:41:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:57,751 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2018-01-23 14:41:57,751 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-23 14:41:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2018-01-23 14:41:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-01-23 14:41:57,753 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:57,754 INFO L322 BasicCegarLoop]: trace histogram [44, 40, 40, 40, 40, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:57,754 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:57,754 INFO L82 PathProgramCache]: Analyzing trace with hash 132824627, now seen corresponding path program 10 times [2018-01-23 14:41:57,754 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:57,754 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:57,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:57,755 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:57,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:57,776 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 11 proven. 1880 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2018-01-23 14:41:58,392 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:58,392 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:58,399 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:41:58,475 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:58,482 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:41:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 1649 proven. 245 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2018-01-23 14:41:58,754 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:41:58,755 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:41:58,755 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:41:58,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:41:58,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:41:58,756 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 26 states. [2018-01-23 14:41:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:41:59,118 INFO L93 Difference]: Finished difference Result 230 states and 251 transitions. [2018-01-23 14:41:59,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:41:59,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 264 [2018-01-23 14:41:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:41:59,121 INFO L225 Difference]: With dead ends: 230 [2018-01-23 14:41:59,121 INFO L226 Difference]: Without dead ends: 123 [2018-01-23 14:41:59,122 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:41:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-23 14:41:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2018-01-23 14:41:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-23 14:41:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2018-01-23 14:41:59,131 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 264 [2018-01-23 14:41:59,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:41:59,132 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2018-01-23 14:41:59,132 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:41:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2018-01-23 14:41:59,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-01-23 14:41:59,134 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:41:59,134 INFO L322 BasicCegarLoop]: trace histogram [48, 44, 44, 44, 44, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:41:59,134 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:41:59,135 INFO L82 PathProgramCache]: Analyzing trace with hash -171303065, now seen corresponding path program 11 times [2018-01-23 14:41:59,135 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:41:59,135 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:41:59,136 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:59,136 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:41:59,136 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:41:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:41:59,170 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:41:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5156 backedges. 11 proven. 2259 refuted. 0 times theorem prover too weak. 2886 trivial. 0 not checked. [2018-01-23 14:41:59,731 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:41:59,731 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:41:59,736 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:41:59,756 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,757 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,760 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,764 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,768 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,772 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,776 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,781 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,793 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,821 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:41:59,823 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:41:59,829 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5156 backedges. 1976 proven. 297 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-01-23 14:42:00,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:00,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:42:00,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:42:00,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:42:00,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:42:00,112 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 28 states. [2018-01-23 14:42:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:00,469 INFO L93 Difference]: Finished difference Result 240 states and 261 transitions. [2018-01-23 14:42:00,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:42:00,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 284 [2018-01-23 14:42:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:00,470 INFO L225 Difference]: With dead ends: 240 [2018-01-23 14:42:00,470 INFO L226 Difference]: Without dead ends: 128 [2018-01-23 14:42:00,471 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:42:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-23 14:42:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2018-01-23 14:42:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-23 14:42:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2018-01-23 14:42:00,477 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 284 [2018-01-23 14:42:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:00,478 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2018-01-23 14:42:00,478 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:42:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2018-01-23 14:42:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-01-23 14:42:00,480 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:00,480 INFO L322 BasicCegarLoop]: trace histogram [52, 48, 48, 48, 48, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:00,480 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2029948749, now seen corresponding path program 12 times [2018-01-23 14:42:00,481 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:00,481 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:00,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:00,482 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:00,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:00,515 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 11 proven. 2673 refuted. 0 times theorem prover too weak. 3414 trivial. 0 not checked. [2018-01-23 14:42:01,163 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:01,163 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:01,168 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:42:01,187 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,189 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,191 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,193 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,197 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,200 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,205 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,211 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,220 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:01,221 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:01,229 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 6060 trivial. 0 not checked. [2018-01-23 14:42:01,357 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:01,357 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2018-01-23 14:42:01,358 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:42:01,358 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:42:01,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:42:01,358 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand 21 states. [2018-01-23 14:42:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:01,548 INFO L93 Difference]: Finished difference Result 289 states and 318 transitions. [2018-01-23 14:42:01,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:42:01,549 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 304 [2018-01-23 14:42:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:01,550 INFO L225 Difference]: With dead ends: 289 [2018-01-23 14:42:01,550 INFO L226 Difference]: Without dead ends: 172 [2018-01-23 14:42:01,551 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:42:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-23 14:42:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 139. [2018-01-23 14:42:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-23 14:42:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2018-01-23 14:42:01,559 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 304 [2018-01-23 14:42:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:01,559 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2018-01-23 14:42:01,559 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:42:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2018-01-23 14:42:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-01-23 14:42:01,561 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:01,561 INFO L322 BasicCegarLoop]: trace histogram [70, 65, 65, 65, 65, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:01,561 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1350287972, now seen corresponding path program 13 times [2018-01-23 14:42:01,561 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:01,562 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:01,562 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:01,562 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:01,562 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:01,590 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11170 backedges. 14 proven. 4024 refuted. 0 times theorem prover too weak. 7132 trivial. 0 not checked. [2018-01-23 14:42:02,336 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:02,336 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:02,343 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:02,443 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11170 backedges. 3626 proven. 416 refuted. 0 times theorem prover too weak. 7128 trivial. 0 not checked. [2018-01-23 14:42:02,845 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:02,845 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-23 14:42:02,846 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:42:02,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:42:02,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:42:02,846 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 32 states. [2018-01-23 14:42:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:03,435 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2018-01-23 14:42:03,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:42:03,435 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 400 [2018-01-23 14:42:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:03,436 INFO L225 Difference]: With dead ends: 278 [2018-01-23 14:42:03,437 INFO L226 Difference]: Without dead ends: 147 [2018-01-23 14:42:03,438 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=592, Invalid=1570, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:42:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-23 14:42:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2018-01-23 14:42:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-23 14:42:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 155 transitions. [2018-01-23 14:42:03,444 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 155 transitions. Word has length 400 [2018-01-23 14:42:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:03,444 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 155 transitions. [2018-01-23 14:42:03,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:42:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 155 transitions. [2018-01-23 14:42:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-01-23 14:42:03,446 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:03,446 INFO L322 BasicCegarLoop]: trace histogram [75, 70, 70, 70, 70, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:03,446 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1570210812, now seen corresponding path program 14 times [2018-01-23 14:42:03,446 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:03,447 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:03,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:03,447 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:03,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:03,477 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12895 backedges. 14 proven. 4647 refuted. 0 times theorem prover too weak. 8234 trivial. 0 not checked. [2018-01-23 14:42:04,373 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:04,373 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:04,378 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:42:04,407 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:04,457 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:04,469 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:04,480 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12895 backedges. 4182 proven. 483 refuted. 0 times theorem prover too weak. 8230 trivial. 0 not checked. [2018-01-23 14:42:05,298 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:05,298 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:42:05,299 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:42:05,299 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:42:05,299 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:42:05,299 INFO L87 Difference]: Start difference. First operand 144 states and 155 transitions. Second operand 34 states. [2018-01-23 14:42:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:05,768 INFO L93 Difference]: Finished difference Result 288 states and 314 transitions. [2018-01-23 14:42:05,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:42:05,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 425 [2018-01-23 14:42:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:05,770 INFO L225 Difference]: With dead ends: 288 [2018-01-23 14:42:05,770 INFO L226 Difference]: Without dead ends: 152 [2018-01-23 14:42:05,771 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=671, Invalid=1779, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:42:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-23 14:42:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2018-01-23 14:42:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-23 14:42:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2018-01-23 14:42:05,780 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 425 [2018-01-23 14:42:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:05,781 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2018-01-23 14:42:05,781 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:42:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2018-01-23 14:42:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-01-23 14:42:05,784 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:05,785 INFO L322 BasicCegarLoop]: trace histogram [80, 75, 75, 75, 75, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:05,785 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash -877517212, now seen corresponding path program 15 times [2018-01-23 14:42:05,785 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:05,785 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:05,786 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:05,786 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:05,786 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:05,826 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14745 backedges. 14 proven. 5315 refuted. 0 times theorem prover too weak. 9416 trivial. 0 not checked. [2018-01-23 14:42:06,946 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:06,946 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:06,952 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:42:06,981 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:06,985 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:06,990 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:06,994 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,000 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,009 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,014 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,019 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,026 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,034 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,041 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,049 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,066 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,076 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,090 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,100 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:07,102 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:07,108 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14745 backedges. 4778 proven. 555 refuted. 0 times theorem prover too weak. 9412 trivial. 0 not checked. [2018-01-23 14:42:07,560 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:07,560 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:42:07,561 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:42:07,561 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:42:07,562 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:42:07,562 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 36 states. [2018-01-23 14:42:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:08,179 INFO L93 Difference]: Finished difference Result 298 states and 324 transitions. [2018-01-23 14:42:08,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:42:08,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 450 [2018-01-23 14:42:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:08,181 INFO L225 Difference]: With dead ends: 298 [2018-01-23 14:42:08,181 INFO L226 Difference]: Without dead ends: 157 [2018-01-23 14:42:08,182 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=755, Invalid=2001, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:42:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-23 14:42:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2018-01-23 14:42:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-01-23 14:42:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2018-01-23 14:42:08,188 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 450 [2018-01-23 14:42:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:08,188 INFO L432 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2018-01-23 14:42:08,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:42:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2018-01-23 14:42:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-01-23 14:42:08,190 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:08,191 INFO L322 BasicCegarLoop]: trace histogram [85, 80, 80, 80, 80, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:08,191 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:08,191 INFO L82 PathProgramCache]: Analyzing trace with hash 982430980, now seen corresponding path program 16 times [2018-01-23 14:42:08,191 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:08,191 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:08,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:08,192 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:08,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:08,227 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16720 backedges. 14 proven. 6028 refuted. 0 times theorem prover too weak. 10678 trivial. 0 not checked. [2018-01-23 14:42:09,213 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:09,213 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:09,219 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:42:09,331 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:09,338 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16720 backedges. 5414 proven. 632 refuted. 0 times theorem prover too weak. 10674 trivial. 0 not checked. [2018-01-23 14:42:09,971 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:09,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:42:09,972 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:42:09,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:42:09,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:42:09,973 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand 38 states. [2018-01-23 14:42:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:10,470 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2018-01-23 14:42:10,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:42:10,471 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 475 [2018-01-23 14:42:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:10,472 INFO L225 Difference]: With dead ends: 308 [2018-01-23 14:42:10,472 INFO L226 Difference]: Without dead ends: 162 [2018-01-23 14:42:10,473 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=844, Invalid=2236, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:42:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-01-23 14:42:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2018-01-23 14:42:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-01-23 14:42:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2018-01-23 14:42:10,480 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 475 [2018-01-23 14:42:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:10,480 INFO L432 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2018-01-23 14:42:10,480 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:42:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2018-01-23 14:42:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-01-23 14:42:10,483 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:10,483 INFO L322 BasicCegarLoop]: trace histogram [90, 85, 85, 85, 85, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:10,483 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -444773788, now seen corresponding path program 17 times [2018-01-23 14:42:10,483 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:10,483 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:10,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:10,484 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:10,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:10,512 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18820 backedges. 14 proven. 6786 refuted. 0 times theorem prover too weak. 12020 trivial. 0 not checked. [2018-01-23 14:42:11,514 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:11,514 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:11,519 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:42:11,539 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,543 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,544 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,545 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,549 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,552 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,554 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,556 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,559 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,563 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,566 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,569 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,573 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,576 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,580 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,584 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,589 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,594 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,601 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,608 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,616 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,624 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,633 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,642 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,653 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,664 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,676 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,691 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,705 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,722 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,741 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,761 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,784 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:11,786 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:11,793 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18820 backedges. 10662 proven. 714 refuted. 0 times theorem prover too weak. 7444 trivial. 0 not checked. [2018-01-23 14:42:12,263 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:12,263 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:42:12,264 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:42:12,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:42:12,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:42:12,264 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand 40 states. [2018-01-23 14:42:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:12,811 INFO L93 Difference]: Finished difference Result 318 states and 344 transitions. [2018-01-23 14:42:12,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:42:12,812 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 500 [2018-01-23 14:42:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:12,814 INFO L225 Difference]: With dead ends: 318 [2018-01-23 14:42:12,814 INFO L226 Difference]: Without dead ends: 167 [2018-01-23 14:42:12,816 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=2484, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:42:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-01-23 14:42:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2018-01-23 14:42:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-01-23 14:42:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 175 transitions. [2018-01-23 14:42:12,825 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 175 transitions. Word has length 500 [2018-01-23 14:42:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:12,826 INFO L432 AbstractCegarLoop]: Abstraction has 164 states and 175 transitions. [2018-01-23 14:42:12,826 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:42:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 175 transitions. [2018-01-23 14:42:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-01-23 14:42:12,830 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:12,831 INFO L322 BasicCegarLoop]: trace histogram [95, 90, 90, 90, 90, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:12,831 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 359181828, now seen corresponding path program 18 times [2018-01-23 14:42:12,831 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:12,831 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:12,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:12,832 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:12,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:12,873 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21045 backedges. 14 proven. 7589 refuted. 0 times theorem prover too weak. 13442 trivial. 0 not checked. [2018-01-23 14:42:14,164 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:14,165 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:14,170 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:42:14,194 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,196 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,198 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,200 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,203 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,205 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,209 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,212 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,218 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,222 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,226 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,231 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,236 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,240 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,245 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,250 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,259 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,266 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,273 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,281 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,290 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,298 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,309 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,318 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,329 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:14,344 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:14,351 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21045 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 20985 trivial. 0 not checked. [2018-01-23 14:42:14,559 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:14,559 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2018-01-23 14:42:14,560 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:42:14,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:42:14,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:42:14,560 INFO L87 Difference]: Start difference. First operand 164 states and 175 transitions. Second operand 28 states. [2018-01-23 14:42:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:15,034 INFO L93 Difference]: Finished difference Result 372 states and 406 transitions. [2018-01-23 14:42:15,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:42:15,034 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 525 [2018-01-23 14:42:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:15,036 INFO L225 Difference]: With dead ends: 372 [2018-01-23 14:42:15,036 INFO L226 Difference]: Without dead ends: 216 [2018-01-23 14:42:15,037 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:42:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-01-23 14:42:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 178. [2018-01-23 14:42:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-01-23 14:42:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 191 transitions. [2018-01-23 14:42:15,048 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 191 transitions. Word has length 525 [2018-01-23 14:42:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:15,048 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 191 transitions. [2018-01-23 14:42:15,048 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:42:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 191 transitions. [2018-01-23 14:42:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2018-01-23 14:42:15,053 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:15,054 INFO L322 BasicCegarLoop]: trace histogram [120, 114, 114, 114, 114, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:15,054 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash 440436513, now seen corresponding path program 19 times [2018-01-23 14:42:15,054 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:15,054 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:15,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:15,055 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:15,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:15,104 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 33750 backedges. 17 proven. 10323 refuted. 0 times theorem prover too weak. 23410 trivial. 0 not checked. [2018-01-23 14:42:16,594 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:16,594 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:16,599 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:16,699 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33750 backedges. 9452 proven. 893 refuted. 0 times theorem prover too weak. 23405 trivial. 0 not checked. [2018-01-23 14:42:17,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:17,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:42:17,309 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:42:17,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:42:17,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:42:17,310 INFO L87 Difference]: Start difference. First operand 178 states and 191 transitions. Second operand 44 states. [2018-01-23 14:42:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:17,966 INFO L93 Difference]: Finished difference Result 356 states and 387 transitions. [2018-01-23 14:42:17,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:42:17,967 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 656 [2018-01-23 14:42:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:17,970 INFO L225 Difference]: With dead ends: 356 [2018-01-23 14:42:17,970 INFO L226 Difference]: Without dead ends: 186 [2018-01-23 14:42:17,972 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1141, Invalid=3019, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:42:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-01-23 14:42:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2018-01-23 14:42:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-01-23 14:42:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 196 transitions. [2018-01-23 14:42:17,983 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 196 transitions. Word has length 656 [2018-01-23 14:42:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:17,983 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 196 transitions. [2018-01-23 14:42:17,983 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:42:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 196 transitions. [2018-01-23 14:42:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2018-01-23 14:42:17,989 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:17,990 INFO L322 BasicCegarLoop]: trace histogram [126, 120, 120, 120, 120, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:17,990 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:17,990 INFO L82 PathProgramCache]: Analyzing trace with hash 138230419, now seen corresponding path program 20 times [2018-01-23 14:42:17,990 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:17,990 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:17,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:17,991 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:42:17,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:18,042 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 37317 backedges. 17 proven. 11415 refuted. 0 times theorem prover too weak. 25885 trivial. 0 not checked. [2018-01-23 14:42:19,498 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:19,498 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:19,504 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:42:19,536 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:19,594 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:19,605 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:19,616 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 37317 backedges. 10447 proven. 990 refuted. 0 times theorem prover too weak. 25880 trivial. 0 not checked. [2018-01-23 14:42:20,350 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:20,350 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:42:20,351 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:42:20,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:42:20,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:42:20,352 INFO L87 Difference]: Start difference. First operand 183 states and 196 transitions. Second operand 46 states. [2018-01-23 14:42:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:21,121 INFO L93 Difference]: Finished difference Result 366 states and 397 transitions. [2018-01-23 14:42:21,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:42:21,122 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 686 [2018-01-23 14:42:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:21,124 INFO L225 Difference]: With dead ends: 366 [2018-01-23 14:42:21,124 INFO L226 Difference]: Without dead ends: 191 [2018-01-23 14:42:21,127 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1250, Invalid=3306, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:42:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-23 14:42:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2018-01-23 14:42:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-01-23 14:42:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2018-01-23 14:42:21,137 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 686 [2018-01-23 14:42:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:21,137 INFO L432 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2018-01-23 14:42:21,138 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:42:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2018-01-23 14:42:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2018-01-23 14:42:21,144 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:21,144 INFO L322 BasicCegarLoop]: trace histogram [132, 126, 126, 126, 126, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:21,144 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 29517409, now seen corresponding path program 21 times [2018-01-23 14:42:21,145 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:21,145 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:21,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:21,146 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:21,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:21,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41064 backedges. 17 proven. 12562 refuted. 0 times theorem prover too weak. 28485 trivial. 0 not checked. [2018-01-23 14:42:22,730 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:22,731 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:22,736 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:42:22,768 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,771 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,775 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,780 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,786 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,792 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,797 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,806 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,814 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,823 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,833 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,845 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,856 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,868 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,879 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,905 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,920 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,939 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,961 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:22,987 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:23,011 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:23,036 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:42:23,039 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:23,049 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 41064 backedges. 11492 proven. 1092 refuted. 0 times theorem prover too weak. 28480 trivial. 0 not checked. [2018-01-23 14:42:23,896 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:23,896 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:42:23,897 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:42:23,897 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:42:23,897 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:42:23,897 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand 48 states. [2018-01-23 14:42:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:24,589 INFO L93 Difference]: Finished difference Result 376 states and 407 transitions. [2018-01-23 14:42:24,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:42:24,589 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 716 [2018-01-23 14:42:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:24,591 INFO L225 Difference]: With dead ends: 376 [2018-01-23 14:42:24,591 INFO L226 Difference]: Without dead ends: 196 [2018-01-23 14:42:24,594 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1364, Invalid=3606, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:42:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-01-23 14:42:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2018-01-23 14:42:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-01-23 14:42:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 206 transitions. [2018-01-23 14:42:24,604 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 206 transitions. Word has length 716 [2018-01-23 14:42:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:24,605 INFO L432 AbstractCegarLoop]: Abstraction has 193 states and 206 transitions. [2018-01-23 14:42:24,605 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:42:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 206 transitions. [2018-01-23 14:42:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2018-01-23 14:42:24,611 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:24,612 INFO L322 BasicCegarLoop]: trace histogram [138, 132, 132, 132, 132, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:24,612 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1172108883, now seen corresponding path program 22 times [2018-01-23 14:42:24,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:24,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:24,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:24,613 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:24,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:24,670 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44991 backedges. 17 proven. 13764 refuted. 0 times theorem prover too weak. 31210 trivial. 0 not checked. [2018-01-23 14:42:26,253 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:26,253 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:26,258 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:42:26,465 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:26,475 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44991 backedges. 12587 proven. 1199 refuted. 0 times theorem prover too weak. 31205 trivial. 0 not checked. [2018-01-23 14:42:27,200 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:27,200 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:42:27,201 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:42:27,201 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:42:27,202 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=1846, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:42:27,202 INFO L87 Difference]: Start difference. First operand 193 states and 206 transitions. Second operand 50 states. [2018-01-23 14:42:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:27,908 INFO L93 Difference]: Finished difference Result 386 states and 417 transitions. [2018-01-23 14:42:27,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:42:27,908 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 746 [2018-01-23 14:42:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:27,909 INFO L225 Difference]: With dead ends: 386 [2018-01-23 14:42:27,909 INFO L226 Difference]: Without dead ends: 201 [2018-01-23 14:42:27,911 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1483, Invalid=3919, Unknown=0, NotChecked=0, Total=5402 [2018-01-23 14:42:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-01-23 14:42:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2018-01-23 14:42:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-01-23 14:42:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 211 transitions. [2018-01-23 14:42:27,917 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 211 transitions. Word has length 746 [2018-01-23 14:42:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:27,917 INFO L432 AbstractCegarLoop]: Abstraction has 198 states and 211 transitions. [2018-01-23 14:42:27,917 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:42:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 211 transitions. [2018-01-23 14:42:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2018-01-23 14:42:27,921 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:27,922 INFO L322 BasicCegarLoop]: trace histogram [144, 138, 138, 138, 138, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:27,922 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1429599649, now seen corresponding path program 23 times [2018-01-23 14:42:27,922 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:27,922 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:27,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:27,923 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:27,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:27,960 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49098 backedges. 17 proven. 15021 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2018-01-23 14:42:29,688 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:29,688 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:42:29,693 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:42:29,725 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,726 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,727 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,728 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,729 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,731 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,732 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,734 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,736 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,737 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,741 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,744 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,747 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,750 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,753 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,756 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,759 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,762 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,766 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,769 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,773 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,777 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,782 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,786 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,791 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,808 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,814 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,821 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,828 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,835 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,843 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,852 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,862 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,872 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,883 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,894 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,906 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,921 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,936 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:42:29,937 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:29,943 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49098 backedges. 24724 proven. 1311 refuted. 0 times theorem prover too weak. 23063 trivial. 0 not checked. [2018-01-23 14:42:30,753 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:42:30,753 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:42:30,754 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:42:30,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:42:30,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1998, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:42:30,755 INFO L87 Difference]: Start difference. First operand 198 states and 211 transitions. Second operand 52 states. [2018-01-23 14:42:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:42:31,521 INFO L93 Difference]: Finished difference Result 396 states and 427 transitions. [2018-01-23 14:42:31,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:42:31,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 776 [2018-01-23 14:42:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:42:31,522 INFO L225 Difference]: With dead ends: 396 [2018-01-23 14:42:31,522 INFO L226 Difference]: Without dead ends: 206 [2018-01-23 14:42:31,523 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1607, Invalid=4245, Unknown=0, NotChecked=0, Total=5852 [2018-01-23 14:42:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-01-23 14:42:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2018-01-23 14:42:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-01-23 14:42:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 216 transitions. [2018-01-23 14:42:31,533 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 216 transitions. Word has length 776 [2018-01-23 14:42:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:42:31,533 INFO L432 AbstractCegarLoop]: Abstraction has 203 states and 216 transitions. [2018-01-23 14:42:31,534 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:42:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 216 transitions. [2018-01-23 14:42:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2018-01-23 14:42:31,541 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:42:31,541 INFO L322 BasicCegarLoop]: trace histogram [150, 144, 144, 144, 144, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:42:31,541 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:42:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash -546536941, now seen corresponding path program 24 times [2018-01-23 14:42:31,542 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:42:31,542 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:42:31,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:31,543 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:42:31,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:42:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:42:31,599 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:42:32,693 WARN L146 SmtUtils]: Spent 114ms on a formula simplification. DAG size of input: 13 DAG size of output 12 [2018-01-23 14:42:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 53385 backedges. 17 proven. 16333 refuted. 0 times theorem prover too weak. 37035 trivial. 0 not checked. [2018-01-23 14:42:33,595 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:42:33,595 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 [2018-01-23 14:42:33,600 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:42:33,634 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,636 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,639 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,640 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,643 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,645 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,648 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,659 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,664 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,668 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,672 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,678 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,684 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,688 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,695 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,701 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,708 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,714 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,723 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,734 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,745 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,753 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,766 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,776 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,786 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,797 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,809 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,822 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,836 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,847 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,860 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,874 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,890 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,904 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,922 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,938 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,954 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,973 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:33,992 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,017 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-23 14:42:34,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,066 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,090 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,118 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,142 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,169 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,202 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,236 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,269 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:42:34,273 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:42:34,282 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:42:34,293 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-23 14:42:34,294 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:42:34,295 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:42:34,296 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:42:34,296 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:42:34,296 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:42:34,296 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:42:34,296 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:42:34,296 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:42:34,296 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:42:34,296 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:42:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:42:34,297 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:42:34,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:42:34 BoogieIcfgContainer [2018-01-23 14:42:34,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:42:34,299 INFO L168 Benchmark]: Toolchain (without parser) took 43561.67 ms. Allocated memory was 305.7 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 264.6 MB in the beginning and 400.8 MB in the end (delta: -136.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 5.3 GB. [2018-01-23 14:42:34,301 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 305.7 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:42:34,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.36 ms. Allocated memory is still 305.7 MB. Free memory was 262.5 MB in the beginning and 254.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:42:34,301 INFO L168 Benchmark]: Boogie Preprocessor took 27.58 ms. Allocated memory is still 305.7 MB. Free memory was 254.5 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:42:34,302 INFO L168 Benchmark]: RCFGBuilder took 239.10 ms. Allocated memory is still 305.7 MB. Free memory was 252.5 MB in the beginning and 237.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:42:34,302 INFO L168 Benchmark]: TraceAbstraction took 43113.36 ms. Allocated memory was 305.7 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 237.5 MB in the beginning and 400.8 MB in the end (delta: -163.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 5.3 GB. [2018-01-23 14:42:34,304 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 305.7 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 174.36 ms. Allocated memory is still 305.7 MB. Free memory was 262.5 MB in the beginning and 254.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.58 ms. Allocated memory is still 305.7 MB. Free memory was 254.5 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 239.10 ms. Allocated memory is still 305.7 MB. Free memory was 252.5 MB in the beginning and 237.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 43113.36 ms. Allocated memory was 305.7 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 237.5 MB in the beginning and 400.8 MB in the end (delta: -163.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 807 with TraceHistMax 150, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 28 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. TIMEOUT Result, 42.6s OverallTime, 27 OverallIterations, 150 TraceHistogramMax, 9.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 878 SDtfs, 2055 SDslu, 12573 SDs, 0 SdLazy, 4317 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8750 GetRequests, 7870 SyntacticMatches, 0 SemanticMatches, 880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7371 ImplicationChecksByTransitivity, 20.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 207 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 23.8s InterpolantComputationTime, 16317 NumberOfCodeBlocks, 14714 NumberOfCodeBlocksAsserted, 227 NumberOfCheckSat, 16268 ConstructedInterpolants, 0 QuantifiedInterpolants, 22315362 SizeOfPredicates, 41 NumberOfNonLiveVariables, 10681 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 49 InterpolantComputations, 3 PerfectInterpolantSequences, 528653/645592 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 21). Cancelled while IsEmpty was searching accepting run (input had 41 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-42-34-313.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-42-34-313.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-42-34-313.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-42-34-313.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-42-34-313.csv Completed graceful shutdown