java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:01:05,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:01:05,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:01:05,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:01:05,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:01:05,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:01:05,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:01:05,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:01:05,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:01:05,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:01:05,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:01:05,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:01:05,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:01:05,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:01:05,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:01:05,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:01:05,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:01:05,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:01:05,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:01:05,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:01:05,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:01:05,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:01:05,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:01:05,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:01:05,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:01:05,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:01:05,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:01:05,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:01:05,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:01:05,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:01:05,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:01:05,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:01:05,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:01:05,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:01:05,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:01:05,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:01:05,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:01:05,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:01:05,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:01:05,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:01:05,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:01:05,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 13:01:05,968 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:01:05,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:01:05,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:01:05,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:01:05,971 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:01:05,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:01:05,972 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:01:05,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:01:05,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:01:05,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:01:05,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:01:05,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:01:05,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:01:05,975 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:01:05,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:01:05,975 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:01:05,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:01:05,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:01:05,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:01:05,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:01:05,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:01:05,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:01:05,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:01:05,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:01:05,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:01:05,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:01:05,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:01:05,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:01:05,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:01:06,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:01:06,040 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:01:06,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:01:06,045 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:01:06,046 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:01:06,046 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2019-09-20 13:01:06,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb954118/88943e2b5a2b4d3f8e9034613fe944b4/FLAG7d8962905 [2019-09-20 13:01:06,585 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:01:06,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test23-2.c [2019-09-20 13:01:06,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb954118/88943e2b5a2b4d3f8e9034613fe944b4/FLAG7d8962905 [2019-09-20 13:01:06,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb954118/88943e2b5a2b4d3f8e9034613fe944b4 [2019-09-20 13:01:06,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:01:07,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:01:07,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:01:07,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:01:07,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:01:07,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:06" (1/1) ... [2019-09-20 13:01:07,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b862e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07, skipping insertion in model container [2019-09-20 13:01:07,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:06" (1/1) ... [2019-09-20 13:01:07,014 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:01:07,033 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:01:07,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:01:07,255 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:01:07,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:01:07,395 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:01:07,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07 WrapperNode [2019-09-20 13:01:07,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:01:07,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:01:07,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:01:07,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:01:07,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... [2019-09-20 13:01:07,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:01:07,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:01:07,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:01:07,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:01:07,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:01:07,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:01:07,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:01:07,503 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-09-20 13:01:07,503 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-09-20 13:01:07,503 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-20 13:01:07,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:01:07,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:01:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:01:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-20 13:01:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-09-20 13:01:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:01:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-09-20 13:01:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-20 13:01:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:01:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:01:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:01:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:01:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:01:07,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:01:07,827 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:01:07,828 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:01:07,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:07 BoogieIcfgContainer [2019-09-20 13:01:07,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:01:07,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:01:07,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:01:07,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:01:07,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:01:06" (1/3) ... [2019-09-20 13:01:07,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708bd9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:07, skipping insertion in model container [2019-09-20 13:01:07,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:07" (2/3) ... [2019-09-20 13:01:07,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708bd9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:07, skipping insertion in model container [2019-09-20 13:01:07,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:07" (3/3) ... [2019-09-20 13:01:07,841 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-09-20 13:01:07,853 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:01:07,863 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:01:07,880 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:01:07,909 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:01:07,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:01:07,910 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:01:07,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:01:07,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:01:07,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:01:07,910 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:01:07,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:01:07,911 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:01:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-20 13:01:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 13:01:07,934 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:07,935 INFO L407 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] [2019-09-20 13:01:07,937 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash -128514638, now seen corresponding path program 1 times [2019-09-20 13:01:07,942 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:07,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:07,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:01:08,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:08,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:01:08,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:01:08,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:01:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:01:08,185 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-09-20 13:01:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:08,210 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-09-20 13:01:08,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:01:08,212 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2019-09-20 13:01:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:08,221 INFO L225 Difference]: With dead ends: 46 [2019-09-20 13:01:08,222 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 13:01:08,225 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:01:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 13:01:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-20 13:01:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 13:01:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-09-20 13:01:08,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 30 [2019-09-20 13:01:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:08,269 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-09-20 13:01:08,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:01:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-09-20 13:01:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 13:01:08,271 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:08,272 INFO L407 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, 1] [2019-09-20 13:01:08,272 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1246729484, now seen corresponding path program 1 times [2019-09-20 13:01:08,273 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:08,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:08,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:08,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:08,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:01:08,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:08,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-09-20 13:01:08,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 13:01:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 13:01:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:01:08,699 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2019-09-20 13:01:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:09,112 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2019-09-20 13:01:09,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-20 13:01:09,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-09-20 13:01:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:09,116 INFO L225 Difference]: With dead ends: 56 [2019-09-20 13:01:09,117 INFO L226 Difference]: Without dead ends: 48 [2019-09-20 13:01:09,118 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:01:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-20 13:01:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2019-09-20 13:01:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 13:01:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-20 13:01:09,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 31 [2019-09-20 13:01:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:09,129 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-20 13:01:09,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-20 13:01:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-20 13:01:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-20 13:01:09,130 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:09,131 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:09,131 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:09,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1472168143, now seen corresponding path program 1 times [2019-09-20 13:01:09,132 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:09,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:09,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:09,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:09,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:01:09,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:09,471 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:01:09,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:09,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-20 13:01:09,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:09,824 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2019-09-20 13:01:09,826 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:09,846 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:09,850 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:01:09,850 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2019-09-20 13:01:09,973 INFO L172 IndexEqualityManager]: detected equality via solver [2019-09-20 13:01:09,975 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:09,976 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 19 [2019-09-20 13:01:09,977 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:09,990 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:09,992 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:01:09,993 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:22 [2019-09-20 13:01:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:01:12,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:12,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2019-09-20 13:01:12,177 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-20 13:01:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-20 13:01:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=400, Unknown=2, NotChecked=0, Total=462 [2019-09-20 13:01:12,179 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 22 states. [2019-09-20 13:01:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:18,180 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2019-09-20 13:01:18,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:01:18,181 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-09-20 13:01:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:18,182 INFO L225 Difference]: With dead ends: 60 [2019-09-20 13:01:18,183 INFO L226 Difference]: Without dead ends: 52 [2019-09-20 13:01:18,184 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=157, Invalid=831, Unknown=4, NotChecked=0, Total=992 [2019-09-20 13:01:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-20 13:01:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2019-09-20 13:01:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-20 13:01:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-09-20 13:01:18,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-09-20 13:01:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:18,193 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-09-20 13:01:18,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-20 13:01:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-09-20 13:01:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-20 13:01:18,194 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:18,194 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:18,195 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1302295574, now seen corresponding path program 2 times [2019-09-20 13:01:18,195 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:18,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:18,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:18,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:18,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:01:18,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:18,528 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:01:18,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 13:01:18,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 13:01:18,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:01:18,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-20 13:01:18,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:18,710 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2019-09-20 13:01:18,710 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:18,721 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:18,722 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:18,722 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2019-09-20 13:01:18,866 INFO L172 IndexEqualityManager]: detected equality via solver [2019-09-20 13:01:18,868 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:18,869 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 22 [2019-09-20 13:01:18,870 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:18,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:18,881 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:01:18,882 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:35 [2019-09-20 13:01:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:01:18,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:18,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2019-09-20 13:01:18,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-20 13:01:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-20 13:01:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2019-09-20 13:01:18,946 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 22 states. [2019-09-20 13:01:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:20,356 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2019-09-20 13:01:20,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-20 13:01:20,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2019-09-20 13:01:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:20,358 INFO L225 Difference]: With dead ends: 79 [2019-09-20 13:01:20,359 INFO L226 Difference]: Without dead ends: 71 [2019-09-20 13:01:20,361 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2019-09-20 13:01:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-20 13:01:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2019-09-20 13:01:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-20 13:01:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-09-20 13:01:20,387 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 35 [2019-09-20 13:01:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:20,389 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-09-20 13:01:20,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-20 13:01:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-09-20 13:01:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-20 13:01:20,394 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:20,394 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 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] [2019-09-20 13:01:20,394 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:20,395 INFO L82 PathProgramCache]: Analyzing trace with hash -387236795, now seen corresponding path program 3 times [2019-09-20 13:01:20,395 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:20,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:20,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:20,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:01:20,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:01:20,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:20,698 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:01:20,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:01:20,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 13:01:20,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:01:20,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-20 13:01:20,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:20,854 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2019-09-20 13:01:20,854 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:20,866 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:20,867 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:20,867 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2019-09-20 13:01:23,125 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~pa~0.offset Int) (v_main_~pd2~0.base_BEFORE_CALL_1 Int)) (and (let ((.cse0 (div (+ main_~pa~0.offset (- 8)) 4))) (= .cse0 (select (select |c_#memory_int| v_main_~pd2~0.base_BEFORE_CALL_1) (+ (* 4 .cse0) 8)))) (= 0 (mod main_~pa~0.offset 4)))) is different from true [2019-09-20 13:01:29,216 WARN L191 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 34 [2019-09-20 13:01:29,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 13:01:29,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:29,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2019-09-20 13:01:29,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-20 13:01:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-20 13:01:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=579, Unknown=1, NotChecked=48, Total=702 [2019-09-20 13:01:29,316 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 27 states. [2019-09-20 13:01:55,898 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21