/usr/bin/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:33:06,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:33:06,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:33:06,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:33:06,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:33:06,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:33:06,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:33:06,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:33:06,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:33:06,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:33:06,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:33:06,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:33:06,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:33:06,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:33:06,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:33:06,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:33:06,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:33:06,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:33:06,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:33:06,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:33:06,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:33:06,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:33:06,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:33:06,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:33:06,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:33:06,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:33:06,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:33:06,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:33:06,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:33:06,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:33:06,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:33:06,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:33:06,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:33:06,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:33:06,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:33:06,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:33:06,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:33:06,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:33:06,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:33:06,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:33:06,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:33:06,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:33:06,697 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:33:06,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:33:06,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:33:06,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:33:06,699 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:33:06,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:33:06,700 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:33:06,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:33:06,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:33:06,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:33:06,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:33:06,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:33:06,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:33:06,701 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:33:06,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:33:06,701 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:33:06,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:33:06,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:33:06,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:33:06,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:33:06,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:33:06,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:33:06,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:33:06,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:33:06,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:33:06,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:33:06,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:33:06,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:33:06,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:33:06,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:33:07,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:33:07,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:33:07,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:33:07,032 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:33:07,033 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:33:07,034 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 23:33:07,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d11f52a2c/ef5b765cbaff482281ed15b4a8bde14e/FLAGf12540d0b [2020-08-18 23:33:07,656 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:33:07,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 23:33:07,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d11f52a2c/ef5b765cbaff482281ed15b4a8bde14e/FLAGf12540d0b [2020-08-18 23:33:07,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d11f52a2c/ef5b765cbaff482281ed15b4a8bde14e [2020-08-18 23:33:07,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:33:07,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:33:07,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:33:07,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:33:07,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:33:07,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:33:07" (1/1) ... [2020-08-18 23:33:07,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b40a8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:07, skipping insertion in model container [2020-08-18 23:33:07,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:33:07" (1/1) ... [2020-08-18 23:33:07,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:33:08,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:33:08,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:33:08,561 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:33:08,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:33:08,664 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:33:08,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08 WrapperNode [2020-08-18 23:33:08,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:33:08,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:33:08,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:33:08,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:33:08,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... [2020-08-18 23:33:08,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:33:08,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:33:08,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:33:08,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:33:08,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 23:33:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:33:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:33:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:33:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 23:33:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 23:33:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 23:33:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 23:33:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 23:33:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 23:33:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 23:33:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 23:33:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 23:33:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 23:33:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 23:33:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 23:33:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 23:33:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 23:33:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 23:33:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 23:33:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 23:33:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 23:33:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 23:33:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 23:33:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 23:33:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 23:33:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 23:33:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 23:33:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 23:33:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 23:33:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 23:33:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 23:33:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 23:33:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 23:33:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 23:33:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 23:33:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 23:33:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 23:33:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 23:33:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 23:33:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 23:33:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 23:33:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 23:33:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 23:33:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 23:33:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 23:33:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 23:33:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 23:33:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 23:33:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 23:33:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 23:33:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 23:33:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 23:33:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 23:33:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 23:33:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 23:33:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 23:33:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 23:33:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 23:33:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 23:33:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 23:33:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 23:33:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 23:33:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 23:33:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 23:33:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 23:33:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 23:33:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 23:33:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 23:33:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 23:33:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 23:33:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:33:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:33:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:33:09,539 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:33:09,539 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-18 23:33:09,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:33:09 BoogieIcfgContainer [2020-08-18 23:33:09,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:33:09,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:33:09,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:33:09,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:33:09,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:33:07" (1/3) ... [2020-08-18 23:33:09,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345a8ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:33:09, skipping insertion in model container [2020-08-18 23:33:09,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:08" (2/3) ... [2020-08-18 23:33:09,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345a8ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:33:09, skipping insertion in model container [2020-08-18 23:33:09,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:33:09" (3/3) ... [2020-08-18 23:33:09,552 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-18 23:33:09,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:33:09,571 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-18 23:33:09,583 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-18 23:33:09,605 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:33:09,605 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:33:09,605 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:33:09,606 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:33:09,606 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:33:09,606 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:33:09,606 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:33:09,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:33:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-18 23:33:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-18 23:33:09,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:09,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:09,638 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-18 23:33:09,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:09,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147172297] [2020-08-18 23:33:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:09,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147172297] [2020-08-18 23:33:09,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:09,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:33:09,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114565408] [2020-08-18 23:33:09,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:33:09,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:33:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:09,898 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-18 23:33:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:10,251 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-18 23:33:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:33:10,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-18 23:33:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:10,264 INFO L225 Difference]: With dead ends: 186 [2020-08-18 23:33:10,265 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 23:33:10,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 23:33:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-18 23:33:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 23:33:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 23:33:10,317 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-18 23:33:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:10,318 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 23:33:10,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:33:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 23:33:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 23:33:10,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:10,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:10,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:33:10,320 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-18 23:33:10,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:10,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802867698] [2020-08-18 23:33:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:10,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:10,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802867698] [2020-08-18 23:33:10,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:10,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:33:10,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723307640] [2020-08-18 23:33:10,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:33:10,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:33:10,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:10,401 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-18 23:33:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:10,565 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-18 23:33:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:33:10,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 23:33:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:10,567 INFO L225 Difference]: With dead ends: 84 [2020-08-18 23:33:10,567 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 23:33:10,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 23:33:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-18 23:33:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 23:33:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-18 23:33:10,580 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-18 23:33:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:10,581 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-18 23:33:10,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:33:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-18 23:33:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 23:33:10,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:10,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:10,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:33:10,582 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-18 23:33:10,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:10,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082046399] [2020-08-18 23:33:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:10,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:10,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082046399] [2020-08-18 23:33:10,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:10,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:33:10,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233821164] [2020-08-18 23:33:10,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:33:10,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:33:10,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:10,685 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-18 23:33:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:10,922 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-18 23:33:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:33:10,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 23:33:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:10,925 INFO L225 Difference]: With dead ends: 138 [2020-08-18 23:33:10,925 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 23:33:10,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 23:33:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-18 23:33:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 23:33:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-18 23:33:10,935 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-18 23:33:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:10,936 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-18 23:33:10,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:33:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-18 23:33:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 23:33:10,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:10,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:10,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:33:10,937 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-18 23:33:10,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:10,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76823853] [2020-08-18 23:33:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:11,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:11,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76823853] [2020-08-18 23:33:11,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:11,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:33:11,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068994451] [2020-08-18 23:33:11,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:33:11,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:33:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:11,037 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-18 23:33:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:11,241 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 23:33:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:33:11,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 23:33:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:11,243 INFO L225 Difference]: With dead ends: 84 [2020-08-18 23:33:11,243 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 23:33:11,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 23:33:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 23:33:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 23:33:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-18 23:33:11,259 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-18 23:33:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:11,261 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-18 23:33:11,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:33:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-18 23:33:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:33:11,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:11,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:11,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:33:11,263 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-18 23:33:11,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:11,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594605953] [2020-08-18 23:33:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:11,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:11,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594605953] [2020-08-18 23:33:11,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:11,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:33:11,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087052983] [2020-08-18 23:33:11,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:33:11,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:11,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:33:11,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:11,392 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-18 23:33:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:11,632 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-18 23:33:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:33:11,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 23:33:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:11,634 INFO L225 Difference]: With dead ends: 199 [2020-08-18 23:33:11,634 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 23:33:11,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:11,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 23:33:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-18 23:33:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 23:33:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 23:33:11,651 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-18 23:33:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:11,651 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 23:33:11,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:33:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 23:33:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:33:11,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:11,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:11,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:33:11,653 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:11,654 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-18 23:33:11,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:11,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68536527] [2020-08-18 23:33:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:11,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:11,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68536527] [2020-08-18 23:33:11,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:11,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:33:11,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120215114] [2020-08-18 23:33:11,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:33:11,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:33:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:11,735 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-18 23:33:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:11,951 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-18 23:33:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:33:11,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 23:33:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:11,953 INFO L225 Difference]: With dead ends: 126 [2020-08-18 23:33:11,953 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 23:33:11,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:33:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 23:33:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-18 23:33:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 23:33:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-18 23:33:11,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-18 23:33:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:11,970 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-18 23:33:11,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:33:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-18 23:33:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:33:11,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:11,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:11,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:33:11,972 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:11,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-18 23:33:11,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:11,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553894373] [2020-08-18 23:33:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:12,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553894373] [2020-08-18 23:33:12,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:12,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:33:12,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999391268] [2020-08-18 23:33:12,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:33:12,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:33:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:12,069 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-18 23:33:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:12,259 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-18 23:33:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:33:12,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 23:33:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:12,260 INFO L225 Difference]: With dead ends: 136 [2020-08-18 23:33:12,261 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 23:33:12,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:33:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 23:33:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-18 23:33:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 23:33:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-18 23:33:12,268 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-18 23:33:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:12,268 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-18 23:33:12,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:33:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-18 23:33:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:33:12,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:12,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:12,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:33:12,270 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-18 23:33:12,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:12,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888247930] [2020-08-18 23:33:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:12,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888247930] [2020-08-18 23:33:12,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:12,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:33:12,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088340166] [2020-08-18 23:33:12,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:33:12,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:12,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:33:12,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:12,308 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-18 23:33:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:12,433 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-18 23:33:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:33:12,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-18 23:33:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:12,435 INFO L225 Difference]: With dead ends: 141 [2020-08-18 23:33:12,435 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 23:33:12,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 23:33:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-18 23:33:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 23:33:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-18 23:33:12,442 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-18 23:33:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:12,442 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-18 23:33:12,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:33:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-18 23:33:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:33:12,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:12,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:12,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:33:12,444 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-18 23:33:12,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:12,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922466398] [2020-08-18 23:33:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:12,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922466398] [2020-08-18 23:33:12,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:12,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:33:12,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942852010] [2020-08-18 23:33:12,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:33:12,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:33:12,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:12,509 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-18 23:33:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:12,616 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-18 23:33:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:33:12,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 23:33:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:12,617 INFO L225 Difference]: With dead ends: 79 [2020-08-18 23:33:12,617 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 23:33:12,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 23:33:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-18 23:33:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 23:33:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-18 23:33:12,623 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-18 23:33:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:12,624 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-18 23:33:12,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:33:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-18 23:33:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:33:12,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:12,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:12,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:33:12,626 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-18 23:33:12,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:12,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970102236] [2020-08-18 23:33:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:12,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970102236] [2020-08-18 23:33:12,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:12,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:33:12,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945009495] [2020-08-18 23:33:12,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:33:12,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:12,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:33:12,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:12,677 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-18 23:33:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:12,828 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-18 23:33:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:33:12,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 23:33:12,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:12,830 INFO L225 Difference]: With dead ends: 78 [2020-08-18 23:33:12,830 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 23:33:12,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 23:33:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-18 23:33:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 23:33:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-18 23:33:12,836 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-18 23:33:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:12,836 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-18 23:33:12,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:33:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-18 23:33:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:33:12,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:12,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:12,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:33:12,838 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-18 23:33:12,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:12,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403284680] [2020-08-18 23:33:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:12,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403284680] [2020-08-18 23:33:12,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:12,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:33:12,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895557514] [2020-08-18 23:33:12,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:33:12,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:33:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:12,904 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-18 23:33:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:13,211 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-18 23:33:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:33:13,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 23:33:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:13,213 INFO L225 Difference]: With dead ends: 179 [2020-08-18 23:33:13,213 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 23:33:13,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:33:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 23:33:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-18 23:33:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 23:33:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-18 23:33:13,220 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-18 23:33:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:13,221 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-18 23:33:13,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:33:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-18 23:33:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:33:13,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:13,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:13,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:33:13,223 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-18 23:33:13,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:13,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949432006] [2020-08-18 23:33:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949432006] [2020-08-18 23:33:13,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:13,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 23:33:13,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112760593] [2020-08-18 23:33:13,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:33:13,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:33:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:33:13,529 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-18 23:33:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:14,352 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-18 23:33:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 23:33:14,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 23:33:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:14,357 INFO L225 Difference]: With dead ends: 182 [2020-08-18 23:33:14,357 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 23:33:14,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:33:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 23:33:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-18 23:33:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 23:33:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-18 23:33:14,368 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-18 23:33:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:14,368 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-18 23:33:14,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:33:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-18 23:33:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:33:14,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:14,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:14,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:33:14,370 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:14,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-18 23:33:14,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:14,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418755210] [2020-08-18 23:33:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:14,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 23:33:14,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418755210] [2020-08-18 23:33:14,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:14,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:33:14,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928057789] [2020-08-18 23:33:14,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:33:14,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:33:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:33:14,448 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-18 23:33:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:14,657 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-18 23:33:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:33:14,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 23:33:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:14,659 INFO L225 Difference]: With dead ends: 150 [2020-08-18 23:33:14,659 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 23:33:14,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 23:33:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-18 23:33:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 23:33:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-18 23:33:14,671 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-18 23:33:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:14,671 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-18 23:33:14,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:33:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-18 23:33:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:33:14,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:14,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:14,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:33:14,683 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-18 23:33:14,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:14,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713520468] [2020-08-18 23:33:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:14,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 23:33:14,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713520468] [2020-08-18 23:33:14,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:14,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:33:14,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249006732] [2020-08-18 23:33:14,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:33:14,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:33:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:14,778 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-18 23:33:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:14,931 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-18 23:33:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:33:14,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-18 23:33:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:14,933 INFO L225 Difference]: With dead ends: 124 [2020-08-18 23:33:14,933 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 23:33:14,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:33:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 23:33:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-18 23:33:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 23:33:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-18 23:33:14,947 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-18 23:33:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:14,948 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-18 23:33:14,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:33:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-18 23:33:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 23:33:14,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:14,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:14,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:33:14,951 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-18 23:33:14,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:14,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824394000] [2020-08-18 23:33:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:33:14,982 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:33:14,982 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:33:14,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:33:15,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:33:15 BoogieIcfgContainer [2020-08-18 23:33:15,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:33:15,036 INFO L168 Benchmark]: Toolchain (without parser) took 7064.22 ms. Allocated memory was 146.3 MB in the beginning and 294.1 MB in the end (delta: 147.8 MB). Free memory was 99.7 MB in the beginning and 230.0 MB in the end (delta: -130.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:15,036 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:33:15,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.03 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 99.3 MB in the beginning and 168.8 MB in the end (delta: -69.6 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:15,041 INFO L168 Benchmark]: Boogie Preprocessor took 76.59 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 165.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:15,041 INFO L168 Benchmark]: RCFGBuilder took 801.64 ms. Allocated memory is still 202.9 MB. Free memory was 165.4 MB in the beginning and 109.7 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:15,042 INFO L168 Benchmark]: TraceAbstraction took 5486.00 ms. Allocated memory was 202.9 MB in the beginning and 294.1 MB in the end (delta: 91.2 MB). Free memory was 109.0 MB in the beginning and 230.0 MB in the end (delta: -121.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:33:15,050 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 695.03 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 99.3 MB in the beginning and 168.8 MB in the end (delta: -69.6 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.59 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 165.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 801.64 ms. Allocated memory is still 202.9 MB. Free memory was 165.4 MB in the beginning and 109.7 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5486.00 ms. Allocated memory was 202.9 MB in the beginning and 294.1 MB in the end (delta: 91.2 MB). Free memory was 109.0 MB in the beginning and 230.0 MB in the end (delta: -121.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...