/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-22 03:52:19,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:52:19,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:52:19,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:52:19,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:52:19,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:52:19,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:52:19,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:52:19,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:52:19,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:52:19,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:52:19,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:52:19,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:52:19,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:52:19,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:52:19,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:52:19,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:52:19,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:52:19,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:52:19,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:52:19,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:52:19,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:52:19,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:52:19,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:52:19,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:52:19,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:52:19,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:52:19,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:52:19,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:52:19,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:52:19,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:52:19,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:52:19,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:52:19,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:52:19,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:52:19,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:52:19,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:52:19,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:52:19,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:52:19,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:52:19,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:52:19,842 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 [2020-08-22 03:52:19,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:52:19,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:52:19,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:52:19,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:52:19,897 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:52:19,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:52:19,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:52:19,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:52:19,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:52:19,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:52:19,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:52:19,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:52:19,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:52:19,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:52:19,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:52:19,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:52:19,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:52:19,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:52:19,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:52:19,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:52:19,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:52:19,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:52:19,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:52:19,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:52:19,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:52:19,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:52:19,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:52:19,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:52:19,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:52:19,904 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:52:20,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:52:20,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:52:20,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:52:20,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:52:20,270 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:52:20,271 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-22 03:52:20,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8fe6e693/2a93745a3deb4b89b8774062c977ce7a/FLAG077800bfb [2020-08-22 03:52:20,927 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:52:20,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-22 03:52:20,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8fe6e693/2a93745a3deb4b89b8774062c977ce7a/FLAG077800bfb [2020-08-22 03:52:21,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8fe6e693/2a93745a3deb4b89b8774062c977ce7a [2020-08-22 03:52:21,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:52:21,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:52:21,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:52:21,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:52:21,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:52:21,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c46e88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21, skipping insertion in model container [2020-08-22 03:52:21,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:52:21,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:52:21,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:52:21,753 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:52:21,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:52:21,855 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:52:21,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21 WrapperNode [2020-08-22 03:52:21,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:52:21,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:52:21,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:52:21,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:52:21,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (1/1) ... [2020-08-22 03:52:21,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:52:21,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:52:21,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:52:21,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:52:21,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (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 [2020-08-22 03:52:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:52:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:52:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:52:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 03:52:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 03:52:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 03:52:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 03:52:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 03:52:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 03:52:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 03:52:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 03:52:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 03:52:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 03:52:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 03:52:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 03:52:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 03:52:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 03:52:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 03:52:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 03:52:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 03:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 03:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 03:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 03:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 03:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 03:52:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 03:52:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 03:52:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 03:52:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 03:52:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 03:52:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 03:52:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 03:52:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 03:52:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 03:52:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 03:52:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 03:52:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 03:52:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 03:52:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 03:52:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 03:52:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 03:52:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 03:52:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 03:52:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 03:52:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 03:52:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 03:52:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 03:52:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 03:52:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 03:52:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 03:52:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 03:52:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 03:52:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 03:52:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 03:52:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 03:52:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 03:52:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 03:52:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 03:52:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 03:52:22,023 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 03:52:22,024 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 03:52:22,024 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 03:52:22,024 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 03:52:22,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 03:52:22,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 03:52:22,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 03:52:22,025 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 03:52:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 03:52:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 03:52:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 03:52:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 03:52:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 03:52:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 03:52:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 03:52:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 03:52:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 03:52:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 03:52:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:52:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 03:52:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 03:52:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 03:52:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 03:52:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:52:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:52:22,700 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:52:22,701 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-22 03:52:22,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:52:22 BoogieIcfgContainer [2020-08-22 03:52:22,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:52:22,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:52:22,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:52:22,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:52:22,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:52:21" (1/3) ... [2020-08-22 03:52:22,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3520222c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:52:22, skipping insertion in model container [2020-08-22 03:52:22,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:52:21" (2/3) ... [2020-08-22 03:52:22,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3520222c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:52:22, skipping insertion in model container [2020-08-22 03:52:22,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:52:22" (3/3) ... [2020-08-22 03:52:22,722 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-22 03:52:22,733 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:52:22,744 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-22 03:52:22,765 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-22 03:52:22,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:52:22,800 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:52:22,800 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:52:22,800 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:52:22,801 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:52:22,802 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:52:22,802 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:52:22,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:52:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-22 03:52:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-22 03:52:22,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:22,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:52:22,858 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]=== [2020-08-22 03:52:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-22 03:52:22,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:22,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530916640] [2020-08-22 03:52:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:23,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:23,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530916640] [2020-08-22 03:52:23,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:23,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:52:23,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019200903] [2020-08-22 03:52:23,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:52:23,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:52:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:52:23,113 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-22 03:52:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:23,390 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-22 03:52:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:52:23,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-22 03:52:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:23,405 INFO L225 Difference]: With dead ends: 186 [2020-08-22 03:52:23,405 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 03:52:23,410 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 [2020-08-22 03:52:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 03:52:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-22 03:52:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 03:52:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-22 03:52:23,461 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-22 03:52:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:23,462 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-22 03:52:23,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:52:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-22 03:52:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:52:23,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:23,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:52:23,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:52:23,464 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]=== [2020-08-22 03:52:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-22 03:52:23,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:23,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635571902] [2020-08-22 03:52:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:23,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:23,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635571902] [2020-08-22 03:52:23,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:23,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:52:23,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948804034] [2020-08-22 03:52:23,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:52:23,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:23,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:52:23,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:52:23,563 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-22 03:52:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:23,765 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-22 03:52:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:52:23,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 03:52:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:23,767 INFO L225 Difference]: With dead ends: 84 [2020-08-22 03:52:23,768 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 03:52:23,769 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 [2020-08-22 03:52:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 03:52:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-22 03:52:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 03:52:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-22 03:52:23,789 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-22 03:52:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:23,790 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-22 03:52:23,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:52:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-22 03:52:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:52:23,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:23,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:52:23,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:52:23,794 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]=== [2020-08-22 03:52:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-22 03:52:23,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:23,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891991156] [2020-08-22 03:52:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:23,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:23,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891991156] [2020-08-22 03:52:23,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:23,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:52:23,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411930523] [2020-08-22 03:52:23,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:52:23,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:52:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:52:23,877 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-22 03:52:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:24,128 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-22 03:52:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:52:24,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 03:52:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:24,130 INFO L225 Difference]: With dead ends: 138 [2020-08-22 03:52:24,130 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 03:52:24,131 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 [2020-08-22 03:52:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 03:52:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-22 03:52:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 03:52:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-22 03:52:24,141 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-22 03:52:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:24,141 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-22 03:52:24,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:52:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-22 03:52:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:52:24,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:24,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:52:24,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:52:24,143 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]=== [2020-08-22 03:52:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-22 03:52:24,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:24,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76263567] [2020-08-22 03:52:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:24,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:24,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76263567] [2020-08-22 03:52:24,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:24,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:52:24,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062921526] [2020-08-22 03:52:24,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:52:24,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:52:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:52:24,224 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-22 03:52:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:24,402 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-22 03:52:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:52:24,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 03:52:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:24,404 INFO L225 Difference]: With dead ends: 84 [2020-08-22 03:52:24,404 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 03:52:24,405 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 [2020-08-22 03:52:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 03:52:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-22 03:52:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 03:52:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-22 03:52:24,413 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-22 03:52:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:24,414 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-22 03:52:24,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:52:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-22 03:52:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:52:24,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:24,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:52:24,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:52:24,416 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]=== [2020-08-22 03:52:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-22 03:52:24,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:24,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346495043] [2020-08-22 03:52:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:24,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:24,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346495043] [2020-08-22 03:52:24,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:24,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:52:24,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763132338] [2020-08-22 03:52:24,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:52:24,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:24,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:52:24,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:52:24,503 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-22 03:52:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:24,703 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-22 03:52:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:52:24,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-22 03:52:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:24,705 INFO L225 Difference]: With dead ends: 199 [2020-08-22 03:52:24,705 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 03:52:24,706 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 [2020-08-22 03:52:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 03:52:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-22 03:52:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 03:52:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-22 03:52:24,714 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-22 03:52:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:24,714 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-22 03:52:24,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:52:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-22 03:52:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:52:24,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:24,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:52:24,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:52:24,716 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]=== [2020-08-22 03:52:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:24,717 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-22 03:52:24,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:24,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177729286] [2020-08-22 03:52:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:24,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:24,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177729286] [2020-08-22 03:52:24,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:24,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:52:24,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995304135] [2020-08-22 03:52:24,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:52:24,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:52:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:52:24,850 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-22 03:52:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:25,111 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-22 03:52:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:52:25,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 03:52:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:25,113 INFO L225 Difference]: With dead ends: 126 [2020-08-22 03:52:25,113 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 03:52:25,114 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 [2020-08-22 03:52:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 03:52:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-22 03:52:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 03:52:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-22 03:52:25,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-22 03:52:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:25,121 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-22 03:52:25,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:52:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-22 03:52:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:52:25,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:25,122 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] [2020-08-22 03:52:25,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:52:25,123 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]=== [2020-08-22 03:52:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-22 03:52:25,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:25,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856672190] [2020-08-22 03:52:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:25,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856672190] [2020-08-22 03:52:25,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:25,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:52:25,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925438530] [2020-08-22 03:52:25,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:52:25,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:52:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:52:25,179 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-22 03:52:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:25,372 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-22 03:52:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:52:25,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 03:52:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:25,374 INFO L225 Difference]: With dead ends: 136 [2020-08-22 03:52:25,374 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 03:52:25,375 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 [2020-08-22 03:52:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 03:52:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-22 03:52:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 03:52:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-22 03:52:25,382 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-22 03:52:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:25,383 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-22 03:52:25,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:52:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-22 03:52:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:52:25,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:25,384 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] [2020-08-22 03:52:25,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:52:25,384 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]=== [2020-08-22 03:52:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-22 03:52:25,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:25,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103751663] [2020-08-22 03:52:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:25,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103751663] [2020-08-22 03:52:25,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:25,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:52:25,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619362963] [2020-08-22 03:52:25,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:52:25,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:52:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:52:25,428 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-22 03:52:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:25,561 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-22 03:52:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:52:25,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 03:52:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:25,563 INFO L225 Difference]: With dead ends: 141 [2020-08-22 03:52:25,563 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 03:52:25,563 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 [2020-08-22 03:52:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 03:52:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-22 03:52:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 03:52:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-22 03:52:25,569 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-22 03:52:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:25,570 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-22 03:52:25,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:52:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-22 03:52:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:52:25,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:25,571 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] [2020-08-22 03:52:25,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:52:25,571 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]=== [2020-08-22 03:52:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-22 03:52:25,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:25,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314200874] [2020-08-22 03:52:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:25,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314200874] [2020-08-22 03:52:25,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:25,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:52:25,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650689915] [2020-08-22 03:52:25,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:52:25,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:52:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:52:25,643 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-22 03:52:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:25,754 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-22 03:52:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:52:25,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 03:52:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:25,755 INFO L225 Difference]: With dead ends: 79 [2020-08-22 03:52:25,755 INFO L226 Difference]: Without dead ends: 77 [2020-08-22 03:52:25,756 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 [2020-08-22 03:52:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-22 03:52:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-22 03:52:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 03:52:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-22 03:52:25,761 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-22 03:52:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:25,761 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-22 03:52:25,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:52:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-22 03:52:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 03:52:25,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:25,763 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] [2020-08-22 03:52:25,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:52:25,763 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]=== [2020-08-22 03:52:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:25,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-22 03:52:25,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:25,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900186141] [2020-08-22 03:52:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:25,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900186141] [2020-08-22 03:52:25,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:25,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:52:25,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029943376] [2020-08-22 03:52:25,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:52:25,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:25,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:52:25,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:52:25,825 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-22 03:52:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:25,971 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-22 03:52:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:52:25,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 03:52:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:25,972 INFO L225 Difference]: With dead ends: 78 [2020-08-22 03:52:25,972 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 03:52:25,973 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 [2020-08-22 03:52:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 03:52:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 03:52:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 03:52:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-22 03:52:25,977 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-22 03:52:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:25,978 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-22 03:52:25,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:52:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-22 03:52:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:52:25,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:25,979 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] [2020-08-22 03:52:25,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:52:25,980 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]=== [2020-08-22 03:52:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-22 03:52:25,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:25,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118888781] [2020-08-22 03:52:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:26,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:26,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118888781] [2020-08-22 03:52:26,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:26,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:52:26,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391796931] [2020-08-22 03:52:26,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:52:26,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:52:26,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:52:26,061 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-22 03:52:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:26,367 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-22 03:52:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:52:26,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 03:52:26,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:26,369 INFO L225 Difference]: With dead ends: 179 [2020-08-22 03:52:26,369 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 03:52:26,370 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 [2020-08-22 03:52:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 03:52:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-22 03:52:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 03:52:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-22 03:52:26,377 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-22 03:52:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:26,377 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-22 03:52:26,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:52:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-22 03:52:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:52:26,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:26,379 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] [2020-08-22 03:52:26,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:52:26,379 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]=== [2020-08-22 03:52:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-22 03:52:26,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:26,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734849169] [2020-08-22 03:52:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:26,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:52:26,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734849169] [2020-08-22 03:52:26,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:26,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 03:52:26,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867474850] [2020-08-22 03:52:26,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:52:26,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:26,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:52:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:52:26,769 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-22 03:52:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:27,540 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-22 03:52:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 03:52:27,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-22 03:52:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:27,545 INFO L225 Difference]: With dead ends: 182 [2020-08-22 03:52:27,545 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 03:52:27,546 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 [2020-08-22 03:52:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 03:52:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-22 03:52:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 03:52:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-22 03:52:27,554 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-22 03:52:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:27,555 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-22 03:52:27,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:52:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-22 03:52:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:52:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:27,556 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] [2020-08-22 03:52:27,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:52:27,557 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]=== [2020-08-22 03:52:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-22 03:52:27,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:27,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835639907] [2020-08-22 03:52:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:27,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 03:52:27,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835639907] [2020-08-22 03:52:27,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:27,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:52:27,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301265221] [2020-08-22 03:52:27,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:52:27,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:52:27,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:52:27,621 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-22 03:52:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:27,830 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-22 03:52:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:52:27,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 03:52:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:27,832 INFO L225 Difference]: With dead ends: 150 [2020-08-22 03:52:27,832 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 03:52:27,832 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 [2020-08-22 03:52:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 03:52:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-22 03:52:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 03:52:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-22 03:52:27,841 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-22 03:52:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:27,841 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-22 03:52:27,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:52:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-22 03:52:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:52:27,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:27,848 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] [2020-08-22 03:52:27,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:52:27,849 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]=== [2020-08-22 03:52:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-22 03:52:27,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:27,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693166536] [2020-08-22 03:52:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:27,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:52:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:52:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 03:52:27,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693166536] [2020-08-22 03:52:27,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:52:27,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:52:27,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678688103] [2020-08-22 03:52:27,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:52:27,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:52:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:52:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:52:27,902 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-22 03:52:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:52:28,026 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-22 03:52:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:52:28,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-22 03:52:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:52:28,028 INFO L225 Difference]: With dead ends: 124 [2020-08-22 03:52:28,028 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 03:52:28,029 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 [2020-08-22 03:52:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 03:52:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-22 03:52:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 03:52:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-22 03:52:28,036 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-22 03:52:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:52:28,036 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-22 03:52:28,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:52:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-22 03:52:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 03:52:28,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:52:28,038 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] [2020-08-22 03:52:28,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:52:28,038 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]=== [2020-08-22 03:52:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:52:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-22 03:52:28,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:52:28,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308397365] [2020-08-22 03:52:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:52:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:52:28,054 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:52:28,054 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:52:28,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:52:28,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:52:28 BoogieIcfgContainer [2020-08-22 03:52:28,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:52:28,080 INFO L168 Benchmark]: Toolchain (without parser) took 6861.62 ms. Allocated memory was 139.5 MB in the beginning and 288.4 MB in the end (delta: 148.9 MB). Free memory was 99.2 MB in the beginning and 213.8 MB in the end (delta: -114.5 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:52:28,081 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:52:28,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.00 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 99.0 MB in the beginning and 169.3 MB in the end (delta: -70.3 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:52:28,082 INFO L168 Benchmark]: Boogie Preprocessor took 82.68 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 165.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:52:28,083 INFO L168 Benchmark]: RCFGBuilder took 763.12 ms. Allocated memory is still 202.4 MB. Free memory was 165.1 MB in the beginning and 109.6 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:52:28,084 INFO L168 Benchmark]: TraceAbstraction took 5364.95 ms. Allocated memory was 202.4 MB in the beginning and 288.4 MB in the end (delta: 86.0 MB). Free memory was 109.6 MB in the beginning and 213.8 MB in the end (delta: -104.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:52:28,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 637.00 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 99.0 MB in the beginning and 169.3 MB in the end (delta: -70.3 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.68 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 165.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 763.12 ms. Allocated memory is still 202.4 MB. Free memory was 165.1 MB in the beginning and 109.6 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5364.95 ms. Allocated memory was 202.4 MB in the beginning and 288.4 MB in the end (delta: 86.0 MB). Free memory was 109.6 MB in the beginning and 213.8 MB in the end (delta: -104.2 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: 5.2s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.4s, 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, 0.1s 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...