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/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_24_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-35b68b2 [2018-04-06 19:52:35,792 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-06 19:52:35,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-06 19:52:35,809 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-06 19:52:35,810 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-06 19:52:35,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-06 19:52:35,812 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-06 19:52:35,814 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-06 19:52:35,816 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-06 19:52:35,817 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-06 19:52:35,818 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-06 19:52:35,818 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-06 19:52:35,819 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-06 19:52:35,820 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-06 19:52:35,821 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-06 19:52:35,823 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-06 19:52:35,825 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-06 19:52:35,826 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-06 19:52:35,828 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-06 19:52:35,829 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-06 19:52:35,831 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-06 19:52:35,831 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-06 19:52:35,832 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-06 19:52:35,833 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-06 19:52:35,833 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-06 19:52:35,835 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-06 19:52:35,835 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-06 19:52:35,836 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-06 19:52:35,836 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-06 19:52:35,837 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-06 19:52:35,837 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-06 19:52:35,838 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf [2018-04-06 19:52:35,862 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-06 19:52:35,862 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-06 19:52:35,862 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-04-06 19:52:35,863 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-04-06 19:52:35,863 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-04-06 19:52:35,863 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-04-06 19:52:35,864 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-04-06 19:52:35,864 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-04-06 19:52:35,864 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-04-06 19:52:35,864 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-04-06 19:52:35,865 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-04-06 19:52:35,865 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-04-06 19:52:35,865 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-06 19:52:35,865 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-06 19:52:35,865 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-06 19:52:35,866 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-06 19:52:35,866 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-06 19:52:35,866 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-06 19:52:35,866 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-06 19:52:35,866 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-04-06 19:52:35,867 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-06 19:52:35,867 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-06 19:52:35,867 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-06 19:52:35,867 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-04-06 19:52:35,867 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-04-06 19:52:35,867 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-06 19:52:35,868 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-06 19:52:35,868 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-06 19:52:35,868 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-06 19:52:35,868 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-06 19:52:35,868 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-04-06 19:52:35,869 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-04-06 19:52:35,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:35,869 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-04-06 19:52:35,870 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-04-06 19:52:35,870 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-04-06 19:52:35,870 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-04-06 19:52:35,870 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-04-06 19:52:35,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-06 19:52:35,917 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-06 19:52:35,921 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-06 19:52:35,923 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-06 19:52:35,923 INFO L276 PluginConnector]: CDTParser initialized [2018-04-06 19:52:35,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,244 INFO L225 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGcc3f5db53 [2018-04-06 19:52:36,374 INFO L287 CDTParser]: IsIndexed: true [2018-04-06 19:52:36,374 INFO L288 CDTParser]: Found 1 translation units. [2018-04-06 19:52:36,375 INFO L168 CDTParser]: Scanning sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,376 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-06 19:52:36,376 INFO L215 ultiparseSymbolTable]: [2018-04-06 19:52:36,376 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-06 19:52:36,376 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fsanfoundry____false_valid_deref_i__printOdd ('printOdd') in sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,376 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,376 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fsanfoundry____false_valid_deref_i____VERIFIER_assert ('__VERIFIER_assert') in sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,376 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fsanfoundry____false_valid_deref_i__printEven ('printEven') in sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,377 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-06 19:52:36,377 INFO L233 ultiparseSymbolTable]: [2018-04-06 19:52:36,393 INFO L330 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGcc3f5db53 [2018-04-06 19:52:36,398 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-06 19:52:36,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-06 19:52:36,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-06 19:52:36,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-06 19:52:36,408 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-06 19:52:36,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740ba67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36, skipping insertion in model container [2018-04-06 19:52:36,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,434 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-06 19:52:36,449 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-06 19:52:36,584 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-06 19:52:36,602 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-06 19:52:36,606 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 8 non ball SCCs. Number of states in SCCs 8. [2018-04-06 19:52:36,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36 WrapperNode [2018-04-06 19:52:36,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-06 19:52:36,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-06 19:52:36,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-06 19:52:36,615 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-06 19:52:36,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (1/1) ... [2018-04-06 19:52:36,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-06 19:52:36,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-06 19:52:36,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-06 19:52:36,646 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-06 19:52:36,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (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 [2018-04-06 19:52:36,712 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-06 19:52:36,713 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-06 19:52:36,713 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fsanfoundry____false_valid_deref_i____VERIFIER_assert [2018-04-06 19:52:36,713 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fsanfoundry____false_valid_deref_i__printEven [2018-04-06 19:52:36,713 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fsanfoundry____false_valid_deref_i__printOdd [2018-04-06 19:52:36,713 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-06 19:52:36,714 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-04-06 19:52:36,714 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fsanfoundry____false_valid_deref_i____VERIFIER_assert [2018-04-06 19:52:36,714 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-04-06 19:52:36,714 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fsanfoundry____false_valid_deref_i__printEven [2018-04-06 19:52:36,714 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fsanfoundry____false_valid_deref_i__printOdd [2018-04-06 19:52:36,714 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-06 19:52:36,715 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-06 19:52:36,715 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-06 19:52:36,928 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-06 19:52:36,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:52:36 BoogieIcfgContainer [2018-04-06 19:52:36,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-06 19:52:36,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-06 19:52:36,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-06 19:52:36,932 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-06 19:52:36,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:52:36" (1/3) ... [2018-04-06 19:52:36,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785937e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:52:36, skipping insertion in model container [2018-04-06 19:52:36,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:52:36" (2/3) ... [2018-04-06 19:52:36,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785937e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:52:36, skipping insertion in model container [2018-04-06 19:52:36,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:52:36" (3/3) ... [2018-04-06 19:52:36,935 INFO L107 eAbstractionObserver]: Analyzing ICFG sanfoundry_24_false-valid-deref.i [2018-04-06 19:52:36,942 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-06 19:52:36,948 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-04-06 19:52:36,993 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-06 19:52:36,994 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-06 19:52:36,994 INFO L370 AbstractCegarLoop]: Hoare is true [2018-04-06 19:52:36,994 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-06 19:52:36,995 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-06 19:52:36,995 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-06 19:52:36,995 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-06 19:52:36,995 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-06 19:52:36,995 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-06 19:52:36,996 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-06 19:52:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2018-04-06 19:52:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-04-06 19:52:37,015 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:37,016 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:37,016 INFO L408 AbstractCegarLoop]: === Iteration 1 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1687177289, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:37,031 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:37,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:37,087 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:37,141 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 19:52:37,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-04-06 19:52:37,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-06 19:52:37,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-06 19:52:37,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-06 19:52:37,155 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2018-04-06 19:52:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:37,273 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2018-04-06 19:52:37,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-06 19:52:37,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-04-06 19:52:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:37,286 INFO L225 Difference]: With dead ends: 112 [2018-04-06 19:52:37,286 INFO L226 Difference]: Without dead ends: 62 [2018-04-06 19:52:37,290 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-06 19:52:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-04-06 19:52:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2018-04-06 19:52:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-04-06 19:52:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2018-04-06 19:52:37,334 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 13 [2018-04-06 19:52:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:37,335 INFO L459 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2018-04-06 19:52:37,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-06 19:52:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2018-04-06 19:52:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-04-06 19:52:37,337 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:37,337 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:37,338 INFO L408 AbstractCegarLoop]: === Iteration 2 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2045146350, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:37,351 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:37,365 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:37,398 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:37,549 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:37,550 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-04-06 19:52:37,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-06 19:52:37,552 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-06 19:52:37,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-04-06 19:52:37,552 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2018-04-06 19:52:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:37,788 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2018-04-06 19:52:37,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-06 19:52:37,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-04-06 19:52:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:37,790 INFO L225 Difference]: With dead ends: 84 [2018-04-06 19:52:37,791 INFO L226 Difference]: Without dead ends: 82 [2018-04-06 19:52:37,791 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-04-06 19:52:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-04-06 19:52:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2018-04-06 19:52:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-04-06 19:52:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2018-04-06 19:52:37,803 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 20 [2018-04-06 19:52:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:37,803 INFO L459 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2018-04-06 19:52:37,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-06 19:52:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2018-04-06 19:52:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-04-06 19:52:37,805 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:37,805 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:37,805 INFO L408 AbstractCegarLoop]: === Iteration 3 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1745161864, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:37,812 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:37,821 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:52:37,848 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:52:37,892 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 19:52:37,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2018-04-06 19:52:37,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-06 19:52:37,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-06 19:52:37,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-04-06 19:52:37,894 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 6 states. [2018-04-06 19:52:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:38,076 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2018-04-06 19:52:38,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-06 19:52:38,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-04-06 19:52:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:38,078 INFO L225 Difference]: With dead ends: 101 [2018-04-06 19:52:38,079 INFO L226 Difference]: Without dead ends: 76 [2018-04-06 19:52:38,079 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-04-06 19:52:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-04-06 19:52:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-04-06 19:52:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-04-06 19:52:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2018-04-06 19:52:38,089 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 23 [2018-04-06 19:52:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:38,089 INFO L459 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2018-04-06 19:52:38,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-06 19:52:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2018-04-06 19:52:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-04-06 19:52:38,091 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:38,091 INFO L355 BasicCegarLoop]: trace histogram [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] [2018-04-06 19:52:38,091 INFO L408 AbstractCegarLoop]: === Iteration 4 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1074703395, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:38,101 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:38,115 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:38,187 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:38,300 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:38,300 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-04-06 19:52:38,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-04-06 19:52:38,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-04-06 19:52:38,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-04-06 19:52:38,302 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 12 states. [2018-04-06 19:52:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:38,501 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2018-04-06 19:52:38,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-06 19:52:38,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2018-04-06 19:52:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:38,503 INFO L225 Difference]: With dead ends: 107 [2018-04-06 19:52:38,503 INFO L226 Difference]: Without dead ends: 76 [2018-04-06 19:52:38,504 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-04-06 19:52:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-04-06 19:52:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-04-06 19:52:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-04-06 19:52:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2018-04-06 19:52:38,513 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 30 [2018-04-06 19:52:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:38,513 INFO L459 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2018-04-06 19:52:38,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-04-06 19:52:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2018-04-06 19:52:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-04-06 19:52:38,515 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:38,515 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:38,516 INFO L408 AbstractCegarLoop]: === Iteration 5 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash 657284238, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:38,522 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:38,534 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:38,653 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:38,774 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:38,775 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-04-06 19:52:38,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-06 19:52:38,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-06 19:52:38,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-04-06 19:52:38,776 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 16 states. [2018-04-06 19:52:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:39,244 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-04-06 19:52:39,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-06 19:52:39,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2018-04-06 19:52:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:39,246 INFO L225 Difference]: With dead ends: 122 [2018-04-06 19:52:39,249 INFO L226 Difference]: Without dead ends: 120 [2018-04-06 19:52:39,250 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2018-04-06 19:52:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-04-06 19:52:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2018-04-06 19:52:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-04-06 19:52:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2018-04-06 19:52:39,262 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 34 [2018-04-06 19:52:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:39,262 INFO L459 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2018-04-06 19:52:39,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-06 19:52:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2018-04-06 19:52:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-04-06 19:52:39,264 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:39,264 INFO L355 BasicCegarLoop]: trace histogram [3, 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] [2018-04-06 19:52:39,265 INFO L408 AbstractCegarLoop]: === Iteration 6 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash 104818136, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:39,271 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:39,280 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-04-06 19:52:39,292 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-04-06 19:52:39,348 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:39,348 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-04-06 19:52:39,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-06 19:52:39,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-06 19:52:39,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-04-06 19:52:39,349 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 8 states. [2018-04-06 19:52:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:39,427 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2018-04-06 19:52:39,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-06 19:52:39,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2018-04-06 19:52:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:39,428 INFO L225 Difference]: With dead ends: 132 [2018-04-06 19:52:39,429 INFO L226 Difference]: Without dead ends: 130 [2018-04-06 19:52:39,429 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-04-06 19:52:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-04-06 19:52:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2018-04-06 19:52:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-04-06 19:52:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2018-04-06 19:52:39,438 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 37 [2018-04-06 19:52:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:39,438 INFO L459 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2018-04-06 19:52:39,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-06 19:52:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2018-04-06 19:52:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-04-06 19:52:39,440 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:39,440 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:39,440 INFO L408 AbstractCegarLoop]: === Iteration 7 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1386394728, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:39,447 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:39,459 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:52:39,517 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:52:39,605 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:39,605 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-04-06 19:52:39,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-04-06 19:52:39,605 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-04-06 19:52:39,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-04-06 19:52:39,606 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand 18 states. [2018-04-06 19:52:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:39,864 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-04-06 19:52:39,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-04-06 19:52:39,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2018-04-06 19:52:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:39,866 INFO L225 Difference]: With dead ends: 170 [2018-04-06 19:52:39,866 INFO L226 Difference]: Without dead ends: 127 [2018-04-06 19:52:39,867 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2018-04-06 19:52:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-04-06 19:52:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-04-06 19:52:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-04-06 19:52:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2018-04-06 19:52:39,879 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 51 [2018-04-06 19:52:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:39,879 INFO L459 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2018-04-06 19:52:39,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-04-06 19:52:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2018-04-06 19:52:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-04-06 19:52:39,882 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:39,882 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:39,882 INFO L408 AbstractCegarLoop]: === Iteration 8 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash -900606851, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:39,895 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:39,914 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:40,042 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:40,177 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:40,178 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-04-06 19:52:40,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-04-06 19:52:40,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-04-06 19:52:40,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-04-06 19:52:40,179 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 24 states. [2018-04-06 19:52:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:40,502 INFO L93 Difference]: Finished difference Result 176 states and 209 transitions. [2018-04-06 19:52:40,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-04-06 19:52:40,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-04-06 19:52:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:40,504 INFO L225 Difference]: With dead ends: 176 [2018-04-06 19:52:40,504 INFO L226 Difference]: Without dead ends: 127 [2018-04-06 19:52:40,505 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2018-04-06 19:52:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-04-06 19:52:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-04-06 19:52:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-04-06 19:52:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2018-04-06 19:52:40,517 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 58 [2018-04-06 19:52:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:40,517 INFO L459 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2018-04-06 19:52:40,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-04-06 19:52:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2018-04-06 19:52:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-04-06 19:52:40,519 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:40,520 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:40,520 INFO L408 AbstractCegarLoop]: === Iteration 9 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash -648305714, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:40,526 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:40,541 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:40,661 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:40,972 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:40,972 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-04-06 19:52:40,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-06 19:52:40,973 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-06 19:52:40,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-04-06 19:52:40,973 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 32 states. [2018-04-06 19:52:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:42,192 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2018-04-06 19:52:42,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-06 19:52:42,193 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-04-06 19:52:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:42,194 INFO L225 Difference]: With dead ends: 215 [2018-04-06 19:52:42,194 INFO L226 Difference]: Without dead ends: 213 [2018-04-06 19:52:42,195 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-04-06 19:52:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-04-06 19:52:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 199. [2018-04-06 19:52:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-04-06 19:52:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 248 transitions. [2018-04-06 19:52:42,207 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 248 transitions. Word has length 62 [2018-04-06 19:52:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:42,208 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 248 transitions. [2018-04-06 19:52:42,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-06 19:52:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 248 transitions. [2018-04-06 19:52:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-04-06 19:52:42,209 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:42,209 INFO L355 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:42,209 INFO L408 AbstractCegarLoop]: === Iteration 10 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2132897784, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:42,215 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:42,231 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-04-06 19:52:42,266 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-04-06 19:52:42,375 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:42,375 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-04-06 19:52:42,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-06 19:52:42,376 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-06 19:52:42,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-04-06 19:52:42,376 INFO L87 Difference]: Start difference. First operand 199 states and 248 transitions. Second operand 16 states. [2018-04-06 19:52:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:42,674 INFO L93 Difference]: Finished difference Result 240 states and 304 transitions. [2018-04-06 19:52:42,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-06 19:52:42,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-04-06 19:52:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:42,676 INFO L225 Difference]: With dead ends: 240 [2018-04-06 19:52:42,676 INFO L226 Difference]: Without dead ends: 238 [2018-04-06 19:52:42,676 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2018-04-06 19:52:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-04-06 19:52:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2018-04-06 19:52:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-04-06 19:52:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2018-04-06 19:52:42,688 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 65 [2018-04-06 19:52:42,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:42,688 INFO L459 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2018-04-06 19:52:42,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-06 19:52:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2018-04-06 19:52:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-04-06 19:52:42,689 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:42,689 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:42,689 INFO L408 AbstractCegarLoop]: === Iteration 11 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1126284152, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:42,695 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:42,710 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 144 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-04-06 19:52:42,836 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 144 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-04-06 19:52:43,123 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:43,123 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2018-04-06 19:52:43,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-04-06 19:52:43,124 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-04-06 19:52:43,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2018-04-06 19:52:43,124 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand 30 states. [2018-04-06 19:52:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:43,581 INFO L93 Difference]: Finished difference Result 314 states and 385 transitions. [2018-04-06 19:52:43,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-04-06 19:52:43,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2018-04-06 19:52:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:43,583 INFO L225 Difference]: With dead ends: 314 [2018-04-06 19:52:43,583 INFO L226 Difference]: Without dead ends: 235 [2018-04-06 19:52:43,584 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2018-04-06 19:52:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-04-06 19:52:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-04-06 19:52:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-04-06 19:52:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 291 transitions. [2018-04-06 19:52:43,596 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 291 transitions. Word has length 93 [2018-04-06 19:52:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:43,596 INFO L459 AbstractCegarLoop]: Abstraction has 235 states and 291 transitions. [2018-04-06 19:52:43,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-04-06 19:52:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 291 transitions. [2018-04-06 19:52:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-04-06 19:52:43,599 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:43,599 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:43,599 INFO L408 AbstractCegarLoop]: === Iteration 12 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:43,599 INFO L82 PathProgramCache]: Analyzing trace with hash -982231523, now seen corresponding path program 7 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:43,608 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:43,632 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 159 proven. 80 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-06 19:52:43,825 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 159 proven. 80 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-06 19:52:44,024 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:44,025 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2018-04-06 19:52:44,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-04-06 19:52:44,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-04-06 19:52:44,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2018-04-06 19:52:44,026 INFO L87 Difference]: Start difference. First operand 235 states and 291 transitions. Second operand 36 states. [2018-04-06 19:52:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:44,500 INFO L93 Difference]: Finished difference Result 314 states and 384 transitions. [2018-04-06 19:52:44,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-04-06 19:52:44,501 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2018-04-06 19:52:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:44,503 INFO L225 Difference]: With dead ends: 314 [2018-04-06 19:52:44,503 INFO L226 Difference]: Without dead ends: 235 [2018-04-06 19:52:44,505 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=607, Invalid=3175, Unknown=0, NotChecked=0, Total=3782 [2018-04-06 19:52:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-04-06 19:52:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-04-06 19:52:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-04-06 19:52:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 290 transitions. [2018-04-06 19:52:44,517 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 290 transitions. Word has length 100 [2018-04-06 19:52:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:44,518 INFO L459 AbstractCegarLoop]: Abstraction has 235 states and 290 transitions. [2018-04-06 19:52:44,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-04-06 19:52:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 290 transitions. [2018-04-06 19:52:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-04-06 19:52:44,520 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:44,520 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:44,520 INFO L408 AbstractCegarLoop]: === Iteration 13 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash -872257576, now seen corresponding path program 8 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:44,529 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:44,549 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 167 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:52:44,912 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 167 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:52:45,164 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:45,164 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2018-04-06 19:52:45,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-04-06 19:52:45,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-04-06 19:52:45,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2018-04-06 19:52:45,165 INFO L87 Difference]: Start difference. First operand 235 states and 290 transitions. Second operand 42 states. [2018-04-06 19:52:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:45,906 INFO L93 Difference]: Finished difference Result 314 states and 383 transitions. [2018-04-06 19:52:45,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-04-06 19:52:45,906 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 107 [2018-04-06 19:52:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:45,908 INFO L225 Difference]: With dead ends: 314 [2018-04-06 19:52:45,908 INFO L226 Difference]: Without dead ends: 235 [2018-04-06 19:52:45,909 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 159 SyntacticMatches, 14 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=818, Invalid=4438, Unknown=0, NotChecked=0, Total=5256 [2018-04-06 19:52:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-04-06 19:52:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-04-06 19:52:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-04-06 19:52:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 289 transitions. [2018-04-06 19:52:45,917 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 289 transitions. Word has length 107 [2018-04-06 19:52:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:45,917 INFO L459 AbstractCegarLoop]: Abstraction has 235 states and 289 transitions. [2018-04-06 19:52:45,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-04-06 19:52:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 289 transitions. [2018-04-06 19:52:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-04-06 19:52:45,919 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:45,919 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:45,919 INFO L408 AbstractCegarLoop]: === Iteration 14 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1087701571, now seen corresponding path program 9 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:45,928 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:45,948 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 168 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:46,331 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 168 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:46,705 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:46,705 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2018-04-06 19:52:46,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-04-06 19:52:46,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-04-06 19:52:46,706 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2018-04-06 19:52:46,707 INFO L87 Difference]: Start difference. First operand 235 states and 289 transitions. Second operand 48 states. [2018-04-06 19:52:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:47,445 INFO L93 Difference]: Finished difference Result 320 states and 389 transitions. [2018-04-06 19:52:47,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-04-06 19:52:47,445 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2018-04-06 19:52:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:47,447 INFO L225 Difference]: With dead ends: 320 [2018-04-06 19:52:47,447 INFO L226 Difference]: Without dead ends: 235 [2018-04-06 19:52:47,449 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 165 SyntacticMatches, 16 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1060, Invalid=5912, Unknown=0, NotChecked=0, Total=6972 [2018-04-06 19:52:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-04-06 19:52:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-04-06 19:52:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-04-06 19:52:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 288 transitions. [2018-04-06 19:52:47,460 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 288 transitions. Word has length 114 [2018-04-06 19:52:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:47,461 INFO L459 AbstractCegarLoop]: Abstraction has 235 states and 288 transitions. [2018-04-06 19:52:47,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-04-06 19:52:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 288 transitions. [2018-04-06 19:52:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-04-06 19:52:47,463 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:47,463 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:47,463 INFO L408 AbstractCegarLoop]: === Iteration 15 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -627961266, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:47,472 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:47,499 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:47,890 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:52:48,921 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:48,921 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-04-06 19:52:48,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-06 19:52:48,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-06 19:52:48,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-04-06 19:52:48,923 INFO L87 Difference]: Start difference. First operand 235 states and 288 transitions. Second operand 64 states. [2018-04-06 19:52:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:54,406 INFO L93 Difference]: Finished difference Result 407 states and 539 transitions. [2018-04-06 19:52:54,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-06 19:52:54,407 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 118 [2018-04-06 19:52:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:54,408 INFO L225 Difference]: With dead ends: 407 [2018-04-06 19:52:54,409 INFO L226 Difference]: Without dead ends: 405 [2018-04-06 19:52:54,413 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3452 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4624, Invalid=14282, Unknown=0, NotChecked=0, Total=18906 [2018-04-06 19:52:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2018-04-06 19:52:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 379. [2018-04-06 19:52:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-04-06 19:52:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 480 transitions. [2018-04-06 19:52:54,427 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 480 transitions. Word has length 118 [2018-04-06 19:52:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:54,427 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 480 transitions. [2018-04-06 19:52:54,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-06 19:52:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 480 transitions. [2018-04-06 19:52:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-04-06 19:52:54,429 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:54,429 INFO L355 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:54,429 INFO L408 AbstractCegarLoop]: === Iteration 16 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1787685944, now seen corresponding path program 10 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:54,439 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:54,459 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2018-04-06 19:52:54,557 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2018-04-06 19:52:54,814 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:54,814 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-04-06 19:52:54,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-06 19:52:54,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-06 19:52:54,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-04-06 19:52:54,815 INFO L87 Difference]: Start difference. First operand 379 states and 480 transitions. Second operand 32 states. [2018-04-06 19:52:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:55,998 INFO L93 Difference]: Finished difference Result 456 states and 588 transitions. [2018-04-06 19:52:55,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-06 19:52:55,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 121 [2018-04-06 19:52:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:56,000 INFO L225 Difference]: With dead ends: 456 [2018-04-06 19:52:56,000 INFO L226 Difference]: Without dead ends: 454 [2018-04-06 19:52:56,002 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-04-06 19:52:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2018-04-06 19:52:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2018-04-06 19:52:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:52:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 568 transitions. [2018-04-06 19:52:56,022 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 568 transitions. Word has length 121 [2018-04-06 19:52:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:56,023 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 568 transitions. [2018-04-06 19:52:56,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-06 19:52:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 568 transitions. [2018-04-06 19:52:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-04-06 19:52:56,025 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:56,025 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:56,025 INFO L408 AbstractCegarLoop]: === Iteration 17 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash -405765320, now seen corresponding path program 11 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:56,034 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:56,064 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 626 proven. 212 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-04-06 19:52:56,625 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 626 proven. 212 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-04-06 19:52:57,005 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:57,005 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2018-04-06 19:52:57,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-04-06 19:52:57,006 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-04-06 19:52:57,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2018-04-06 19:52:57,007 INFO L87 Difference]: Start difference. First operand 451 states and 568 transitions. Second operand 54 states. [2018-04-06 19:52:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:52:57,920 INFO L93 Difference]: Finished difference Result 602 states and 749 transitions. [2018-04-06 19:52:57,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-04-06 19:52:57,921 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 177 [2018-04-06 19:52:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:52:57,922 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:52:57,923 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:52:57,924 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 283 SyntacticMatches, 18 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1333, Invalid=7597, Unknown=0, NotChecked=0, Total=8930 [2018-04-06 19:52:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:52:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:52:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:52:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 567 transitions. [2018-04-06 19:52:57,942 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 567 transitions. Word has length 177 [2018-04-06 19:52:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:52:57,943 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 567 transitions. [2018-04-06 19:52:57,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-04-06 19:52:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 567 transitions. [2018-04-06 19:52:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-04-06 19:52:57,946 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:52:57,946 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:52:57,946 INFO L408 AbstractCegarLoop]: === Iteration 18 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:52:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1113895261, now seen corresponding path program 12 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:52:57,955 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:52:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:52:57,989 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:52:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 669 proven. 270 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-04-06 19:52:58,402 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:52:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 669 proven. 270 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-04-06 19:52:58,866 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:52:58,866 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2018-04-06 19:52:58,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-04-06 19:52:58,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-04-06 19:52:58,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2018-04-06 19:52:58,867 INFO L87 Difference]: Start difference. First operand 451 states and 567 transitions. Second operand 60 states. [2018-04-06 19:53:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:00,122 INFO L93 Difference]: Finished difference Result 602 states and 748 transitions. [2018-04-06 19:53:00,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-04-06 19:53:00,122 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 184 [2018-04-06 19:53:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:00,124 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:53:00,124 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:00,125 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 289 SyntacticMatches, 20 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1637, Invalid=9493, Unknown=0, NotChecked=0, Total=11130 [2018-04-06 19:53:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 566 transitions. [2018-04-06 19:53:00,136 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 566 transitions. Word has length 184 [2018-04-06 19:53:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:00,137 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 566 transitions. [2018-04-06 19:53:00,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-04-06 19:53:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 566 transitions. [2018-04-06 19:53:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-04-06 19:53:00,139 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:00,139 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:00,139 INFO L408 AbstractCegarLoop]: === Iteration 19 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash 317472664, now seen corresponding path program 13 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:00,145 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:00,177 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 705 proven. 335 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 19:53:00,785 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 705 proven. 335 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 19:53:01,334 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:01,334 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2018-04-06 19:53:01,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-04-06 19:53:01,335 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-04-06 19:53:01,335 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=3719, Unknown=0, NotChecked=0, Total=4290 [2018-04-06 19:53:01,335 INFO L87 Difference]: Start difference. First operand 451 states and 566 transitions. Second operand 66 states. [2018-04-06 19:53:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:02,619 INFO L93 Difference]: Finished difference Result 602 states and 747 transitions. [2018-04-06 19:53:02,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-04-06 19:53:02,619 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-04-06 19:53:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:02,621 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:53:02,621 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:02,623 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 295 SyntacticMatches, 22 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1972, Invalid=11600, Unknown=0, NotChecked=0, Total=13572 [2018-04-06 19:53:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 565 transitions. [2018-04-06 19:53:02,641 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 565 transitions. Word has length 191 [2018-04-06 19:53:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:02,641 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 565 transitions. [2018-04-06 19:53:02,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-04-06 19:53:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 565 transitions. [2018-04-06 19:53:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-04-06 19:53:02,644 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:02,644 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:02,644 INFO L408 AbstractCegarLoop]: === Iteration 20 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1001502467, now seen corresponding path program 14 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:02,650 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:02,680 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 734 proven. 407 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-04-06 19:53:03,210 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 734 proven. 407 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-04-06 19:53:03,845 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:03,845 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2018-04-06 19:53:03,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-04-06 19:53:03,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-04-06 19:53:03,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=4441, Unknown=0, NotChecked=0, Total=5112 [2018-04-06 19:53:03,847 INFO L87 Difference]: Start difference. First operand 451 states and 565 transitions. Second operand 72 states. [2018-04-06 19:53:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:05,324 INFO L93 Difference]: Finished difference Result 602 states and 746 transitions. [2018-04-06 19:53:05,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-04-06 19:53:05,324 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 198 [2018-04-06 19:53:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:05,327 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:53:05,327 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:05,329 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 301 SyntacticMatches, 24 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4551 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2338, Invalid=13918, Unknown=0, NotChecked=0, Total=16256 [2018-04-06 19:53:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 564 transitions. [2018-04-06 19:53:05,344 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 564 transitions. Word has length 198 [2018-04-06 19:53:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:05,345 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 564 transitions. [2018-04-06 19:53:05,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-04-06 19:53:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 564 transitions. [2018-04-06 19:53:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-04-06 19:53:05,347 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:05,348 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:05,348 INFO L408 AbstractCegarLoop]: === Iteration 21 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:05,348 INFO L82 PathProgramCache]: Analyzing trace with hash 118936568, now seen corresponding path program 15 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:05,355 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:05,388 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 756 proven. 486 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-04-06 19:53:06,246 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 756 proven. 486 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-04-06 19:53:06,988 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:06,988 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2018-04-06 19:53:06,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-04-06 19:53:06,989 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-04-06 19:53:06,989 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=5227, Unknown=0, NotChecked=0, Total=6006 [2018-04-06 19:53:06,989 INFO L87 Difference]: Start difference. First operand 451 states and 564 transitions. Second operand 78 states. [2018-04-06 19:53:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:08,775 INFO L93 Difference]: Finished difference Result 602 states and 745 transitions. [2018-04-06 19:53:08,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-04-06 19:53:08,775 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 205 [2018-04-06 19:53:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:08,777 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:53:08,778 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:08,779 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 307 SyntacticMatches, 26 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5403 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2735, Invalid=16447, Unknown=0, NotChecked=0, Total=19182 [2018-04-06 19:53:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 563 transitions. [2018-04-06 19:53:08,795 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 563 transitions. Word has length 205 [2018-04-06 19:53:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:08,796 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 563 transitions. [2018-04-06 19:53:08,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-04-06 19:53:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 563 transitions. [2018-04-06 19:53:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-04-06 19:53:08,798 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:08,799 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:08,799 INFO L408 AbstractCegarLoop]: === Iteration 22 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash -817493859, now seen corresponding path program 16 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:08,809 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:08,850 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 771 proven. 572 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-06 19:53:09,594 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 771 proven. 572 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-06 19:53:10,440 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:10,440 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2018-04-06 19:53:10,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-04-06 19:53:10,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-04-06 19:53:10,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=6077, Unknown=0, NotChecked=0, Total=6972 [2018-04-06 19:53:10,442 INFO L87 Difference]: Start difference. First operand 451 states and 563 transitions. Second operand 84 states. [2018-04-06 19:53:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:12,318 INFO L93 Difference]: Finished difference Result 602 states and 744 transitions. [2018-04-06 19:53:12,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-04-06 19:53:12,319 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 212 [2018-04-06 19:53:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:12,321 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:53:12,322 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:12,323 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 313 SyntacticMatches, 28 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6328 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3163, Invalid=19187, Unknown=0, NotChecked=0, Total=22350 [2018-04-06 19:53:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 562 transitions. [2018-04-06 19:53:12,333 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 562 transitions. Word has length 212 [2018-04-06 19:53:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:12,333 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 562 transitions. [2018-04-06 19:53:12,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-04-06 19:53:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 562 transitions. [2018-04-06 19:53:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-04-06 19:53:12,334 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:12,334 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:12,335 INFO L408 AbstractCegarLoop]: === Iteration 23 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash -176799656, now seen corresponding path program 17 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:12,341 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:12,377 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 779 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:53:13,184 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 779 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:53:14,161 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:14,161 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2018-04-06 19:53:14,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-04-06 19:53:14,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-04-06 19:53:14,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=6991, Unknown=0, NotChecked=0, Total=8010 [2018-04-06 19:53:14,162 INFO L87 Difference]: Start difference. First operand 451 states and 562 transitions. Second operand 90 states. [2018-04-06 19:53:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:16,274 INFO L93 Difference]: Finished difference Result 602 states and 743 transitions. [2018-04-06 19:53:16,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-04-06 19:53:16,274 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 219 [2018-04-06 19:53:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:16,276 INFO L225 Difference]: With dead ends: 602 [2018-04-06 19:53:16,276 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:16,278 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 319 SyntacticMatches, 30 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7326 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3622, Invalid=22138, Unknown=0, NotChecked=0, Total=25760 [2018-04-06 19:53:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 561 transitions. [2018-04-06 19:53:16,294 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 561 transitions. Word has length 219 [2018-04-06 19:53:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:16,294 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 561 transitions. [2018-04-06 19:53:16,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-04-06 19:53:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 561 transitions. [2018-04-06 19:53:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-04-06 19:53:16,297 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:16,297 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:16,297 INFO L408 AbstractCegarLoop]: === Iteration 24 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1150947267, now seen corresponding path program 18 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:16,310 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:16,352 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 780 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:53:17,226 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 780 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:53:18,309 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:18,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 96 [2018-04-06 19:53:18,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-04-06 19:53:18,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-04-06 19:53:18,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=7969, Unknown=0, NotChecked=0, Total=9120 [2018-04-06 19:53:18,321 INFO L87 Difference]: Start difference. First operand 451 states and 561 transitions. Second operand 96 states. [2018-04-06 19:53:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:20,778 INFO L93 Difference]: Finished difference Result 608 states and 749 transitions. [2018-04-06 19:53:20,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-04-06 19:53:20,778 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 226 [2018-04-06 19:53:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:20,780 INFO L225 Difference]: With dead ends: 608 [2018-04-06 19:53:20,780 INFO L226 Difference]: Without dead ends: 451 [2018-04-06 19:53:20,781 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 325 SyntacticMatches, 32 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8397 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4112, Invalid=25300, Unknown=0, NotChecked=0, Total=29412 [2018-04-06 19:53:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-04-06 19:53:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2018-04-06 19:53:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-04-06 19:53:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 560 transitions. [2018-04-06 19:53:20,791 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 560 transitions. Word has length 226 [2018-04-06 19:53:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:20,791 INFO L459 AbstractCegarLoop]: Abstraction has 451 states and 560 transitions. [2018-04-06 19:53:20,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-04-06 19:53:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 560 transitions. [2018-04-06 19:53:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-04-06 19:53:20,792 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:20,793 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:20,793 INFO L408 AbstractCegarLoop]: === Iteration 25 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1222217906, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:20,801 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:20,838 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 0 proven. 3348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:53:22,089 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 0 proven. 3348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 19:53:25,457 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:25,457 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-04-06 19:53:25,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-04-06 19:53:25,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-04-06 19:53:25,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2238, Invalid=14018, Unknown=0, NotChecked=0, Total=16256 [2018-04-06 19:53:25,459 INFO L87 Difference]: Start difference. First operand 451 states and 560 transitions. Second operand 128 states. [2018-04-06 19:53:31,357 WARN L151 SmtUtils]: Spent 243ms on a formula simplification. DAG size of input: 252 DAG size of output 12 [2018-04-06 19:53:32,023 WARN L151 SmtUtils]: Spent 232ms on a formula simplification. DAG size of input: 247 DAG size of output 11 [2018-04-06 19:53:32,474 WARN L151 SmtUtils]: Spent 223ms on a formula simplification. DAG size of input: 244 DAG size of output 12 [2018-04-06 19:53:33,132 WARN L151 SmtUtils]: Spent 227ms on a formula simplification. DAG size of input: 239 DAG size of output 11 [2018-04-06 19:53:33,579 WARN L151 SmtUtils]: Spent 215ms on a formula simplification. DAG size of input: 236 DAG size of output 12 [2018-04-06 19:53:34,214 WARN L151 SmtUtils]: Spent 210ms on a formula simplification. DAG size of input: 231 DAG size of output 11 [2018-04-06 19:53:34,643 WARN L151 SmtUtils]: Spent 203ms on a formula simplification. DAG size of input: 228 DAG size of output 12 [2018-04-06 19:53:35,262 WARN L151 SmtUtils]: Spent 195ms on a formula simplification. DAG size of input: 223 DAG size of output 11 [2018-04-06 19:53:35,692 WARN L151 SmtUtils]: Spent 205ms on a formula simplification. DAG size of input: 220 DAG size of output 12 [2018-04-06 19:53:36,288 WARN L151 SmtUtils]: Spent 186ms on a formula simplification. DAG size of input: 215 DAG size of output 11 [2018-04-06 19:53:36,698 WARN L151 SmtUtils]: Spent 190ms on a formula simplification. DAG size of input: 212 DAG size of output 12 [2018-04-06 19:53:37,268 WARN L151 SmtUtils]: Spent 167ms on a formula simplification. DAG size of input: 207 DAG size of output 11 [2018-04-06 19:53:37,661 WARN L151 SmtUtils]: Spent 169ms on a formula simplification. DAG size of input: 204 DAG size of output 12 [2018-04-06 19:53:38,235 WARN L151 SmtUtils]: Spent 165ms on a formula simplification. DAG size of input: 199 DAG size of output 11 [2018-04-06 19:53:38,603 WARN L151 SmtUtils]: Spent 150ms on a formula simplification. DAG size of input: 196 DAG size of output 12 [2018-04-06 19:53:39,152 WARN L151 SmtUtils]: Spent 154ms on a formula simplification. DAG size of input: 191 DAG size of output 11 [2018-04-06 19:53:39,506 WARN L151 SmtUtils]: Spent 137ms on a formula simplification. DAG size of input: 188 DAG size of output 12 [2018-04-06 19:53:40,042 WARN L151 SmtUtils]: Spent 135ms on a formula simplification. DAG size of input: 183 DAG size of output 11 [2018-04-06 19:53:40,405 WARN L151 SmtUtils]: Spent 146ms on a formula simplification. DAG size of input: 180 DAG size of output 12 [2018-04-06 19:53:40,927 WARN L151 SmtUtils]: Spent 131ms on a formula simplification. DAG size of input: 175 DAG size of output 11 [2018-04-06 19:53:41,281 WARN L151 SmtUtils]: Spent 128ms on a formula simplification. DAG size of input: 172 DAG size of output 12 [2018-04-06 19:53:41,785 WARN L151 SmtUtils]: Spent 114ms on a formula simplification. DAG size of input: 167 DAG size of output 11 [2018-04-06 19:53:42,104 WARN L151 SmtUtils]: Spent 111ms on a formula simplification. DAG size of input: 164 DAG size of output 12 [2018-04-06 19:53:42,588 WARN L151 SmtUtils]: Spent 108ms on a formula simplification. DAG size of input: 159 DAG size of output 11 [2018-04-06 19:53:42,899 WARN L151 SmtUtils]: Spent 103ms on a formula simplification. DAG size of input: 156 DAG size of output 12 [2018-04-06 19:53:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:52,785 INFO L93 Difference]: Finished difference Result 791 states and 1059 transitions. [2018-04-06 19:53:52,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2018-04-06 19:53:52,786 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 230 [2018-04-06 19:53:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:52,788 INFO L225 Difference]: With dead ends: 791 [2018-04-06 19:53:52,788 INFO L226 Difference]: Without dead ends: 789 [2018-04-06 19:53:52,791 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15068 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=18976, Invalid=60266, Unknown=0, NotChecked=0, Total=79242 [2018-04-06 19:53:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2018-04-06 19:53:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 739. [2018-04-06 19:53:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2018-04-06 19:53:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 944 transitions. [2018-04-06 19:53:52,813 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 944 transitions. Word has length 230 [2018-04-06 19:53:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:52,813 INFO L459 AbstractCegarLoop]: Abstraction has 739 states and 944 transitions. [2018-04-06 19:53:52,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-04-06 19:53:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 944 transitions. [2018-04-06 19:53:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-04-06 19:53:52,816 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:52,816 INFO L355 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:52,817 INFO L408 AbstractCegarLoop]: === Iteration 26 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:52,817 INFO L82 PathProgramCache]: Analyzing trace with hash 347112632, now seen corresponding path program 19 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:52,825 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:52,875 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:53:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2018-04-06 19:53:53,208 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:53:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2018-04-06 19:53:54,102 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:53:54,102 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-04-06 19:53:54,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-06 19:53:54,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-06 19:53:54,103 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-04-06 19:53:54,103 INFO L87 Difference]: Start difference. First operand 739 states and 944 transitions. Second operand 64 states. [2018-04-06 19:53:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:53:58,985 INFO L93 Difference]: Finished difference Result 888 states and 1156 transitions. [2018-04-06 19:53:58,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-06 19:53:58,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 233 [2018-04-06 19:53:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:53:58,988 INFO L225 Difference]: With dead ends: 888 [2018-04-06 19:53:58,989 INFO L226 Difference]: Without dead ends: 886 [2018-04-06 19:53:58,989 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3452 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4624, Invalid=14282, Unknown=0, NotChecked=0, Total=18906 [2018-04-06 19:53:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2018-04-06 19:53:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 883. [2018-04-06 19:53:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:53:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1120 transitions. [2018-04-06 19:53:59,015 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1120 transitions. Word has length 233 [2018-04-06 19:53:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:53:59,016 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1120 transitions. [2018-04-06 19:53:59,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-06 19:53:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1120 transitions. [2018-04-06 19:53:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-04-06 19:53:59,020 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:53:59,020 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:53:59,020 INFO L408 AbstractCegarLoop]: === Iteration 27 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:53:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1245859144, now seen corresponding path program 20 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:53:59,030 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:53:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:53:59,106 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 2598 proven. 872 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2018-04-06 19:54:00,107 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 2598 proven. 872 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2018-04-06 19:54:01,355 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:01,355 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 102 [2018-04-06 19:54:01,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-04-06 19:54:01,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-04-06 19:54:01,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1291, Invalid=9011, Unknown=0, NotChecked=0, Total=10302 [2018-04-06 19:54:01,357 INFO L87 Difference]: Start difference. First operand 883 states and 1120 transitions. Second operand 102 states. [2018-04-06 19:54:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:04,218 INFO L93 Difference]: Finished difference Result 1178 states and 1477 transitions. [2018-04-06 19:54:04,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-04-06 19:54:04,218 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 345 [2018-04-06 19:54:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:04,221 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:04,221 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:04,223 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 555 SyntacticMatches, 34 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9541 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4633, Invalid=28673, Unknown=0, NotChecked=0, Total=33306 [2018-04-06 19:54:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1119 transitions. [2018-04-06 19:54:04,241 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1119 transitions. Word has length 345 [2018-04-06 19:54:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:04,242 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1119 transitions. [2018-04-06 19:54:04,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-04-06 19:54:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1119 transitions. [2018-04-06 19:54:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-04-06 19:54:04,246 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:04,246 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:04,246 INFO L408 AbstractCegarLoop]: === Iteration 28 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 108709853, now seen corresponding path program 21 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:04,255 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:04,333 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4334 backedges. 2697 proven. 986 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2018-04-06 19:54:05,460 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4334 backedges. 2697 proven. 986 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2018-04-06 19:54:06,834 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:06,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 108 [2018-04-06 19:54:06,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-04-06 19:54:06,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-04-06 19:54:06,835 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=10117, Unknown=0, NotChecked=0, Total=11556 [2018-04-06 19:54:06,836 INFO L87 Difference]: Start difference. First operand 883 states and 1119 transitions. Second operand 108 states. [2018-04-06 19:54:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:10,085 INFO L93 Difference]: Finished difference Result 1178 states and 1476 transitions. [2018-04-06 19:54:10,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-04-06 19:54:10,086 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 352 [2018-04-06 19:54:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:10,089 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:10,089 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:10,091 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 561 SyntacticMatches, 36 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10758 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5185, Invalid=32257, Unknown=0, NotChecked=0, Total=37442 [2018-04-06 19:54:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1118 transitions. [2018-04-06 19:54:10,106 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1118 transitions. Word has length 352 [2018-04-06 19:54:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:10,106 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1118 transitions. [2018-04-06 19:54:10,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-04-06 19:54:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1118 transitions. [2018-04-06 19:54:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-04-06 19:54:10,110 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:10,110 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:10,110 INFO L408 AbstractCegarLoop]: === Iteration 29 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1398247192, now seen corresponding path program 22 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:10,123 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:10,182 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2789 proven. 1107 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-04-06 19:54:11,427 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2789 proven. 1107 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-04-06 19:54:12,919 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:12,920 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 114 [2018-04-06 19:54:12,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-04-06 19:54:12,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-04-06 19:54:12,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1595, Invalid=11287, Unknown=0, NotChecked=0, Total=12882 [2018-04-06 19:54:12,921 INFO L87 Difference]: Start difference. First operand 883 states and 1118 transitions. Second operand 114 states. [2018-04-06 19:54:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:16,458 INFO L93 Difference]: Finished difference Result 1178 states and 1475 transitions. [2018-04-06 19:54:16,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-04-06 19:54:16,459 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 359 [2018-04-06 19:54:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:16,461 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:16,461 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:16,465 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 567 SyntacticMatches, 38 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12048 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5768, Invalid=36052, Unknown=0, NotChecked=0, Total=41820 [2018-04-06 19:54:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1117 transitions. [2018-04-06 19:54:16,479 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1117 transitions. Word has length 359 [2018-04-06 19:54:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:16,479 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1117 transitions. [2018-04-06 19:54:16,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-04-06 19:54:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1117 transitions. [2018-04-06 19:54:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-04-06 19:54:16,481 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:16,481 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:16,481 INFO L408 AbstractCegarLoop]: === Iteration 30 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash 297942909, now seen corresponding path program 23 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:16,490 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:16,545 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 2874 proven. 1235 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2018-04-06 19:54:18,049 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 2874 proven. 1235 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2018-04-06 19:54:19,795 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:19,795 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 120 [2018-04-06 19:54:19,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-04-06 19:54:19,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-04-06 19:54:19,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1759, Invalid=12521, Unknown=0, NotChecked=0, Total=14280 [2018-04-06 19:54:19,796 INFO L87 Difference]: Start difference. First operand 883 states and 1117 transitions. Second operand 120 states. [2018-04-06 19:54:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:23,764 INFO L93 Difference]: Finished difference Result 1178 states and 1474 transitions. [2018-04-06 19:54:23,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-04-06 19:54:23,764 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 366 [2018-04-06 19:54:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:23,767 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:23,767 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:23,769 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 573 SyntacticMatches, 40 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13411 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6382, Invalid=40058, Unknown=0, NotChecked=0, Total=46440 [2018-04-06 19:54:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1116 transitions. [2018-04-06 19:54:23,783 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1116 transitions. Word has length 366 [2018-04-06 19:54:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:23,783 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1116 transitions. [2018-04-06 19:54:23,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-04-06 19:54:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1116 transitions. [2018-04-06 19:54:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-04-06 19:54:23,785 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:23,785 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:23,785 INFO L408 AbstractCegarLoop]: === Iteration 31 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash -221756552, now seen corresponding path program 24 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:23,791 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:23,840 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4718 backedges. 2952 proven. 1370 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2018-04-06 19:54:25,258 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4718 backedges. 2952 proven. 1370 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2018-04-06 19:54:27,027 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:27,028 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 126 [2018-04-06 19:54:27,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-04-06 19:54:27,029 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-04-06 19:54:27,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1931, Invalid=13819, Unknown=0, NotChecked=0, Total=15750 [2018-04-06 19:54:27,029 INFO L87 Difference]: Start difference. First operand 883 states and 1116 transitions. Second operand 126 states. [2018-04-06 19:54:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:30,948 INFO L93 Difference]: Finished difference Result 1178 states and 1473 transitions. [2018-04-06 19:54:30,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-04-06 19:54:30,948 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 373 [2018-04-06 19:54:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:30,952 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:30,952 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:30,956 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 579 SyntacticMatches, 42 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14847 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7027, Invalid=44275, Unknown=0, NotChecked=0, Total=51302 [2018-04-06 19:54:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1115 transitions. [2018-04-06 19:54:30,979 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1115 transitions. Word has length 373 [2018-04-06 19:54:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:30,980 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1115 transitions. [2018-04-06 19:54:30,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-04-06 19:54:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1115 transitions. [2018-04-06 19:54:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-04-06 19:54:30,982 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:30,982 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:30,982 INFO L408 AbstractCegarLoop]: === Iteration 32 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2085609245, now seen corresponding path program 25 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:30,988 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:31,041 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 3023 proven. 1512 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-04-06 19:54:32,688 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 3023 proven. 1512 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-04-06 19:54:34,689 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:34,689 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 132 [2018-04-06 19:54:34,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-04-06 19:54:34,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-04-06 19:54:34,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=15181, Unknown=0, NotChecked=0, Total=17292 [2018-04-06 19:54:34,691 INFO L87 Difference]: Start difference. First operand 883 states and 1115 transitions. Second operand 132 states. [2018-04-06 19:54:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:38,838 INFO L93 Difference]: Finished difference Result 1178 states and 1472 transitions. [2018-04-06 19:54:38,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-04-06 19:54:38,839 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 380 [2018-04-06 19:54:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:38,842 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:38,842 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:38,844 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 585 SyntacticMatches, 44 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16356 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7703, Invalid=48703, Unknown=0, NotChecked=0, Total=56406 [2018-04-06 19:54:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1114 transitions. [2018-04-06 19:54:38,858 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1114 transitions. Word has length 380 [2018-04-06 19:54:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:38,859 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1114 transitions. [2018-04-06 19:54:38,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-04-06 19:54:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1114 transitions. [2018-04-06 19:54:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-04-06 19:54:38,861 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:38,862 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:38,862 INFO L408 AbstractCegarLoop]: === Iteration 33 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:38,862 INFO L82 PathProgramCache]: Analyzing trace with hash -952774696, now seen corresponding path program 26 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:38,871 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:38,944 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 3087 proven. 1661 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2018-04-06 19:54:40,756 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 3087 proven. 1661 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2018-04-06 19:54:42,908 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:42,908 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 138 [2018-04-06 19:54:42,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-04-06 19:54:42,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-04-06 19:54:42,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2299, Invalid=16607, Unknown=0, NotChecked=0, Total=18906 [2018-04-06 19:54:42,911 INFO L87 Difference]: Start difference. First operand 883 states and 1114 transitions. Second operand 138 states. [2018-04-06 19:54:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:47,811 INFO L93 Difference]: Finished difference Result 1178 states and 1471 transitions. [2018-04-06 19:54:47,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-04-06 19:54:47,811 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 387 [2018-04-06 19:54:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:47,815 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:47,815 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:47,819 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 591 SyntacticMatches, 46 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17938 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=8410, Invalid=53342, Unknown=0, NotChecked=0, Total=61752 [2018-04-06 19:54:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1113 transitions. [2018-04-06 19:54:47,833 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1113 transitions. Word has length 387 [2018-04-06 19:54:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:47,833 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1113 transitions. [2018-04-06 19:54:47,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-04-06 19:54:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1113 transitions. [2018-04-06 19:54:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-04-06 19:54:47,836 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:47,836 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:47,836 INFO L408 AbstractCegarLoop]: === Iteration 34 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1547544253, now seen corresponding path program 27 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:47,841 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:47,899 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5165 backedges. 3144 proven. 1817 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-04-06 19:54:49,827 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:54:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5165 backedges. 3144 proven. 1817 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-04-06 19:54:52,239 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:54:52,240 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 144 [2018-04-06 19:54:52,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-04-06 19:54:52,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-04-06 19:54:52,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2495, Invalid=18097, Unknown=0, NotChecked=0, Total=20592 [2018-04-06 19:54:52,241 INFO L87 Difference]: Start difference. First operand 883 states and 1113 transitions. Second operand 144 states. [2018-04-06 19:54:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:54:57,321 INFO L93 Difference]: Finished difference Result 1178 states and 1470 transitions. [2018-04-06 19:54:57,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-04-06 19:54:57,321 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 394 [2018-04-06 19:54:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:54:57,324 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:54:57,324 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:54:57,329 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 597 SyntacticMatches, 48 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19593 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=9148, Invalid=58192, Unknown=0, NotChecked=0, Total=67340 [2018-04-06 19:54:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:54:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:54:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:54:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1112 transitions. [2018-04-06 19:54:57,353 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1112 transitions. Word has length 394 [2018-04-06 19:54:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:54:57,354 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1112 transitions. [2018-04-06 19:54:57,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-04-06 19:54:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1112 transitions. [2018-04-06 19:54:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2018-04-06 19:54:57,357 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:54:57,357 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:54:57,358 INFO L408 AbstractCegarLoop]: === Iteration 35 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:54:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1991887816, now seen corresponding path program 28 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:54:57,366 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:54:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:54:57,418 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:54:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 3194 proven. 1980 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-04-06 19:54:59,475 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:55:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 3194 proven. 1980 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-04-06 19:55:02,027 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:55:02,027 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 150 [2018-04-06 19:55:02,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-04-06 19:55:02,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-04-06 19:55:02,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2699, Invalid=19651, Unknown=0, NotChecked=0, Total=22350 [2018-04-06 19:55:02,029 INFO L87 Difference]: Start difference. First operand 883 states and 1112 transitions. Second operand 150 states. [2018-04-06 19:55:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:55:08,123 INFO L93 Difference]: Finished difference Result 1178 states and 1469 transitions. [2018-04-06 19:55:08,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-04-06 19:55:08,123 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 401 [2018-04-06 19:55:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:55:08,126 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:55:08,126 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:55:08,130 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 603 SyntacticMatches, 50 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21321 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9917, Invalid=63253, Unknown=0, NotChecked=0, Total=73170 [2018-04-06 19:55:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:55:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:55:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:55:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1111 transitions. [2018-04-06 19:55:08,144 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1111 transitions. Word has length 401 [2018-04-06 19:55:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:55:08,144 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1111 transitions. [2018-04-06 19:55:08,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-04-06 19:55:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1111 transitions. [2018-04-06 19:55:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-04-06 19:55:08,146 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:55:08,146 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:55:08,146 INFO L408 AbstractCegarLoop]: === Iteration 36 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:55:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 304453213, now seen corresponding path program 29 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:55:08,153 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:55:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:55:08,205 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:55:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5498 backedges. 3237 proven. 2150 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-04-06 19:55:10,370 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:55:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5498 backedges. 3237 proven. 2150 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-04-06 19:55:13,166 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:55:13,166 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 156 [2018-04-06 19:55:13,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-04-06 19:55:13,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-04-06 19:55:13,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=21269, Unknown=0, NotChecked=0, Total=24180 [2018-04-06 19:55:13,169 INFO L87 Difference]: Start difference. First operand 883 states and 1111 transitions. Second operand 156 states. [2018-04-06 19:55:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:55:19,321 INFO L93 Difference]: Finished difference Result 1178 states and 1468 transitions. [2018-04-06 19:55:19,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-04-06 19:55:19,321 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 408 [2018-04-06 19:55:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:55:19,324 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:55:19,324 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:55:19,327 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 609 SyntacticMatches, 52 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23122 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=10717, Invalid=68525, Unknown=0, NotChecked=0, Total=79242 [2018-04-06 19:55:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:55:19,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:55:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:55:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1110 transitions. [2018-04-06 19:55:19,341 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1110 transitions. Word has length 408 [2018-04-06 19:55:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:55:19,341 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1110 transitions. [2018-04-06 19:55:19,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-04-06 19:55:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1110 transitions. [2018-04-06 19:55:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-04-06 19:55:19,345 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:55:19,345 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:55:19,345 INFO L408 AbstractCegarLoop]: === Iteration 37 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:55:19,345 INFO L82 PathProgramCache]: Analyzing trace with hash -685805416, now seen corresponding path program 30 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:55:19,354 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:55:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:55:19,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:55:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5675 backedges. 3273 proven. 2327 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 19:55:21,708 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:55:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5675 backedges. 3273 proven. 2327 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 19:55:24,665 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:55:24,665 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 162 [2018-04-06 19:55:24,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-04-06 19:55:24,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-04-06 19:55:24,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3131, Invalid=22951, Unknown=0, NotChecked=0, Total=26082 [2018-04-06 19:55:24,667 INFO L87 Difference]: Start difference. First operand 883 states and 1110 transitions. Second operand 162 states. [2018-04-06 19:55:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:55:31,434 INFO L93 Difference]: Finished difference Result 1178 states and 1467 transitions. [2018-04-06 19:55:31,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-04-06 19:55:31,435 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 415 [2018-04-06 19:55:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:55:31,438 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:55:31,438 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:55:31,441 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 615 SyntacticMatches, 54 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24996 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=11548, Invalid=74008, Unknown=0, NotChecked=0, Total=85556 [2018-04-06 19:55:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:55:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:55:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:55:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1109 transitions. [2018-04-06 19:55:31,456 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1109 transitions. Word has length 415 [2018-04-06 19:55:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:55:31,456 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1109 transitions. [2018-04-06 19:55:31,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-04-06 19:55:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1109 transitions. [2018-04-06 19:55:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-04-06 19:55:31,460 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:55:31,460 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:55:31,460 INFO L408 AbstractCegarLoop]: === Iteration 38 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:55:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash -383668739, now seen corresponding path program 31 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:55:31,466 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:55:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:55:31,521 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:55:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 3302 proven. 2511 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-04-06 19:55:33,956 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:55:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 3302 proven. 2511 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-04-06 19:55:37,116 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:55:37,117 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 168 [2018-04-06 19:55:37,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-04-06 19:55:37,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-04-06 19:55:37,118 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3359, Invalid=24697, Unknown=0, NotChecked=0, Total=28056 [2018-04-06 19:55:37,118 INFO L87 Difference]: Start difference. First operand 883 states and 1109 transitions. Second operand 168 states. [2018-04-06 19:55:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:55:44,065 INFO L93 Difference]: Finished difference Result 1178 states and 1466 transitions. [2018-04-06 19:55:44,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-04-06 19:55:44,065 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 422 [2018-04-06 19:55:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:55:44,068 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:55:44,068 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:55:44,071 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 621 SyntacticMatches, 56 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26943 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=12410, Invalid=79702, Unknown=0, NotChecked=0, Total=92112 [2018-04-06 19:55:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:55:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:55:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:55:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1108 transitions. [2018-04-06 19:55:44,085 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1108 transitions. Word has length 422 [2018-04-06 19:55:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:55:44,085 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1108 transitions. [2018-04-06 19:55:44,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-04-06 19:55:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1108 transitions. [2018-04-06 19:55:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-04-06 19:55:44,087 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:55:44,087 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:55:44,087 INFO L408 AbstractCegarLoop]: === Iteration 39 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:55:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1805155080, now seen corresponding path program 32 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:55:44,093 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:55:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:55:44,146 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:55:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3324 proven. 2702 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-04-06 19:55:46,777 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:55:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3324 proven. 2702 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-04-06 19:55:50,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:55:50,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 174 [2018-04-06 19:55:50,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-04-06 19:55:50,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-04-06 19:55:50,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3595, Invalid=26507, Unknown=0, NotChecked=0, Total=30102 [2018-04-06 19:55:50,161 INFO L87 Difference]: Start difference. First operand 883 states and 1108 transitions. Second operand 174 states. [2018-04-06 19:55:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:55:57,313 INFO L93 Difference]: Finished difference Result 1178 states and 1465 transitions. [2018-04-06 19:55:57,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2018-04-06 19:55:57,338 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 429 [2018-04-06 19:55:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:55:57,340 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:55:57,341 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:55:57,344 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 627 SyntacticMatches, 58 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28963 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13303, Invalid=85607, Unknown=0, NotChecked=0, Total=98910 [2018-04-06 19:55:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:55:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:55:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:55:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1107 transitions. [2018-04-06 19:55:57,357 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1107 transitions. Word has length 429 [2018-04-06 19:55:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:55:57,357 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1107 transitions. [2018-04-06 19:55:57,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-04-06 19:55:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1107 transitions. [2018-04-06 19:55:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-04-06 19:55:57,360 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:55:57,360 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:55:57,360 INFO L408 AbstractCegarLoop]: === Iteration 40 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:55:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1228149347, now seen corresponding path program 33 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:55:57,368 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:55:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:55:57,434 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:56:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 3339 proven. 2900 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-06 19:56:00,418 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:56:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 3339 proven. 2900 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-06 19:56:03,957 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:56:03,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 180 [2018-04-06 19:56:03,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-04-06 19:56:03,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-04-06 19:56:03,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3839, Invalid=28381, Unknown=0, NotChecked=0, Total=32220 [2018-04-06 19:56:03,959 INFO L87 Difference]: Start difference. First operand 883 states and 1107 transitions. Second operand 180 states. [2018-04-06 19:56:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:56:11,239 INFO L93 Difference]: Finished difference Result 1178 states and 1464 transitions. [2018-04-06 19:56:11,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-04-06 19:56:11,239 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 436 [2018-04-06 19:56:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:56:11,242 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:56:11,242 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:56:11,245 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 633 SyntacticMatches, 60 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31056 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=14227, Invalid=91723, Unknown=0, NotChecked=0, Total=105950 [2018-04-06 19:56:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:56:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:56:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:56:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1106 transitions. [2018-04-06 19:56:11,258 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1106 transitions. Word has length 436 [2018-04-06 19:56:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:56:11,258 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1106 transitions. [2018-04-06 19:56:11,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-04-06 19:56:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1106 transitions. [2018-04-06 19:56:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-04-06 19:56:11,260 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:56:11,261 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:56:11,261 INFO L408 AbstractCegarLoop]: === Iteration 41 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:56:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1245999448, now seen corresponding path program 34 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:56:11,266 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:56:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:56:11,320 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 19:56:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 3347 proven. 3105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:56:14,241 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 19:56:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 3347 proven. 3105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-06 19:56:18,013 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 19:56:18,014 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 186 [2018-04-06 19:56:18,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-04-06 19:56:18,015 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-04-06 19:56:18,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4091, Invalid=30319, Unknown=0, NotChecked=0, Total=34410 [2018-04-06 19:56:18,016 INFO L87 Difference]: Start difference. First operand 883 states and 1106 transitions. Second operand 186 states. [2018-04-06 19:56:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 19:56:25,560 INFO L93 Difference]: Finished difference Result 1178 states and 1463 transitions. [2018-04-06 19:56:25,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2018-04-06 19:56:25,560 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 443 [2018-04-06 19:56:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 19:56:25,563 INFO L225 Difference]: With dead ends: 1178 [2018-04-06 19:56:25,563 INFO L226 Difference]: Without dead ends: 883 [2018-04-06 19:56:25,567 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 639 SyntacticMatches, 62 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33222 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=15182, Invalid=98050, Unknown=0, NotChecked=0, Total=113232 [2018-04-06 19:56:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2018-04-06 19:56:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2018-04-06 19:56:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-04-06 19:56:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1105 transitions. [2018-04-06 19:56:25,580 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1105 transitions. Word has length 443 [2018-04-06 19:56:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 19:56:25,580 INFO L459 AbstractCegarLoop]: Abstraction has 883 states and 1105 transitions. [2018-04-06 19:56:25,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-04-06 19:56:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1105 transitions. [2018-04-06 19:56:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-04-06 19:56:25,583 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 19:56:25,583 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 19:56:25,583 INFO L408 AbstractCegarLoop]: === Iteration 42 === [mainErr3AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-06 19:56:25,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2067682621, now seen corresponding path program 35 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 19:56:25,589 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 19:56:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 19:56:25,646 INFO L270 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-04-06 19:56:27,041 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-04-06 19:56:27,041 WARN L519 AbstractCegarLoop]: Verification canceled [2018-04-06 19:56:27,045 WARN L197 ceAbstractionStarter]: Timeout [2018-04-06 19:56:27,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:56:27 BoogieIcfgContainer [2018-04-06 19:56:27,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-06 19:56:27,046 INFO L168 Benchmark]: Toolchain (without parser) took 230647.21 ms. Allocated memory was 302.0 MB in the beginning and 1.2 GB in the end (delta: 912.8 MB). Free memory was 245.7 MB in the beginning and 1.0 GB in the end (delta: -758.8 MB). Peak memory consumption was 153.9 MB. Max. memory is 5.3 GB. [2018-04-06 19:56:27,047 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 302.0 MB. Free memory is still 264.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-06 19:56:27,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.02 ms. Allocated memory is still 302.0 MB. Free memory was 245.7 MB in the beginning and 235.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-04-06 19:56:27,047 INFO L168 Benchmark]: Boogie Preprocessor took 30.65 ms. Allocated memory is still 302.0 MB. Free memory was 235.6 MB in the beginning and 234.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-04-06 19:56:27,048 INFO L168 Benchmark]: RCFGBuilder took 283.16 ms. Allocated memory was 302.0 MB in the beginning and 461.4 MB in the end (delta: 159.4 MB). Free memory was 234.6 MB in the beginning and 429.7 MB in the end (delta: -195.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 5.3 GB. [2018-04-06 19:56:27,048 INFO L168 Benchmark]: TraceAbstraction took 230115.75 ms. Allocated memory was 461.4 MB in the beginning and 1.2 GB in the end (delta: 753.4 MB). Free memory was 429.7 MB in the beginning and 1.0 GB in the end (delta: -574.8 MB). Peak memory consumption was 178.6 MB. Max. memory is 5.3 GB. [2018-04-06 19:56:27,050 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 302.0 MB. Free memory is still 264.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 213.02 ms. Allocated memory is still 302.0 MB. Free memory was 245.7 MB in the beginning and 235.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.65 ms. Allocated memory is still 302.0 MB. Free memory was 235.6 MB in the beginning and 234.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 283.16 ms. Allocated memory was 302.0 MB in the beginning and 461.4 MB in the end (delta: 159.4 MB). Free memory was 234.6 MB in the beginning and 429.7 MB in the end (delta: -195.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 230115.75 ms. Allocated memory was 461.4 MB in the beginning and 1.2 GB in the end (delta: 753.4 MB). Free memory was 429.7 MB in the beginning and 1.0 GB in the end (delta: -574.8 MB). Peak memory consumption was 178.6 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 451 with TraceHistMax 32, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 88 known predicates. - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 19). Cancelled while BasicCegarLoop was analyzing trace of length 451 with TraceHistMax 32, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 88 known predicates. - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 451 with TraceHistMax 32, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 88 known predicates. - TimeoutResultAtElement [Line: 17]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 17). Cancelled while BasicCegarLoop was analyzing trace of length 451 with TraceHistMax 32, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 88 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 4 error locations. TIMEOUT Result, 230.0s OverallTime, 42 OverallIterations, 32 TraceHistogramMax, 137.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5396 SDtfs, 15373 SDslu, 104054 SDs, 0 SdLazy, 104146 SolverSat, 10957 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20784 GetRequests, 13763 SyntacticMatches, 992 SemanticMatches, 6029 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374484 ImplicationChecksByTransitivity, 176.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=883occurred 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 41 MinimizatonAttempts, 135 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 87.4s InterpolantComputationTime, 9031 NumberOfCodeBlocks, 9031 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 17980 ConstructedInterpolants, 0 QuantifiedInterpolants, 22473196 SizeOfPredicates, 2150 NumberOfNonLiveVariables, 12480 ConjunctsInSsa, 2346 ConjunctsInUnsatCore, 82 InterpolantComputations, 4 PerfectInterpolantSequences, 116686/192096 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sanfoundry_24_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-Benchmark-0-2018-04-06_19-56-27-059.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sanfoundry_24_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-04-06_19-56-27-059.csv Completed graceful shutdown