/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:26:45,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:26:45,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:26:45,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:26:45,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:26:45,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:26:45,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:26:45,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:26:45,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:26:45,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:26:45,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:26:45,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:26:45,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:26:45,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:26:45,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:26:45,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:26:45,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:26:45,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:26:45,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:26:45,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:26:45,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:26:45,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:26:45,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:26:45,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:26:45,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:26:45,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:26:45,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:26:45,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:26:45,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:26:45,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:26:45,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:26:45,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:26:45,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:26:45,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:26:45,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:26:45,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:26:45,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:26:45,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:26:45,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:26:45,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:26:45,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:26:45,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:26:45,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:26:45,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:26:45,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:26:45,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:26:45,921 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:26:45,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:26:45,922 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:26:45,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:26:45,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:26:45,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:26:45,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:26:45,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:26:45,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:26:45,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:26:45,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:26:45,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:26:45,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:26:45,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:26:45,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:26:45,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:26:45,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:26:45,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:26:45,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:26:45,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:26:45,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:26:45,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:26:45,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:45,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:26:45,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:26:45,926 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:26:46,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:26:46,251 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:26:46,255 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:26:46,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:26:46,257 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:26:46,257 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 11:26:46,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9728512/69f08721026f472a8c36a2a2677af2fc/FLAG20f5e5f72 [2020-07-20 11:26:46,965 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:26:46,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 11:26:46,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9728512/69f08721026f472a8c36a2a2677af2fc/FLAG20f5e5f72 [2020-07-20 11:26:47,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9728512/69f08721026f472a8c36a2a2677af2fc [2020-07-20 11:26:47,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:26:47,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:26:47,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:26:47,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:26:47,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:26:47,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:47,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c380e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47, skipping insertion in model container [2020-07-20 11:26:47,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:47,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:26:47,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:26:47,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:26:47,870 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:26:47,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:26:47,982 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:26:47,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47 WrapperNode [2020-07-20 11:26:47,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:26:47,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:26:47,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:26:47,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:26:48,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... [2020-07-20 11:26:48,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:26:48,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:26:48,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:26:48,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:26:48,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:26:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:26:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:26:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:26:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 11:26:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 11:26:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 11:26:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 11:26:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 11:26:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-20 11:26:48,139 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-20 11:26:48,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:26:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:26:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:26:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:26:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:26:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:26:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:26:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:26:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:26:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:26:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:26:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:26:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:26:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:26:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:26:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:26:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:26:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:26:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:26:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 11:26:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 11:26:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 11:26:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 11:26:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 11:26:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:26:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:26:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:26:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:26:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:26:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:26:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:26:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:26:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:26:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:26:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:26:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:26:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:26:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:26:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:26:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:26:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:26:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:26:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:26:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:26:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:26:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:26:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:26:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:26:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:26:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:26:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:26:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-20 11:26:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:26:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:26:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-20 11:26:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:26:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:26:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:26:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:26:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:26:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:26:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:26:48,735 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:26:48,735 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 11:26:48,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:26:48 BoogieIcfgContainer [2020-07-20 11:26:48,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:26:48,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:26:48,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:26:48,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:26:48,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:26:47" (1/3) ... [2020-07-20 11:26:48,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcc885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:26:48, skipping insertion in model container [2020-07-20 11:26:48,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:26:47" (2/3) ... [2020-07-20 11:26:48,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcc885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:26:48, skipping insertion in model container [2020-07-20 11:26:48,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:26:48" (3/3) ... [2020-07-20 11:26:48,752 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-20 11:26:48,766 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:26:48,776 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:26:48,791 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:26:48,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:26:48,817 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:26:48,817 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:26:48,817 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:26:48,817 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:26:48,817 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:26:48,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:26:48,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:26:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 11:26:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 11:26:48,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:26:48,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-07-20 11:26:48,854 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:26:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:26:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-20 11:26:48,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:26:48,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516369364] [2020-07-20 11:26:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:26:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:26:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:26:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 11:26:49,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:26:49,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516369364] [2020-07-20 11:26:49,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:26:49,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:26:49,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599189677] [2020-07-20 11:26:49,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:26:49,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:26:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:26:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:26:49,279 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-20 11:26:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:26:49,305 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-20 11:26:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:26:49,307 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2020-07-20 11:26:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:26:49,317 INFO L225 Difference]: With dead ends: 58 [2020-07-20 11:26:49,317 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:26:49,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:26:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:26:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:26:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:26:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-20 11:26:49,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 45 [2020-07-20 11:26:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:26:49,376 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-20 11:26:49,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:26:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-20 11:26:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 11:26:49,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:26:49,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-07-20 11:26:49,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:49,596 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:26:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:26:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1842115760, now seen corresponding path program 1 times [2020-07-20 11:26:49,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:26:49,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164055136] [2020-07-20 11:26:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:26:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:26:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:26:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:26:49,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:26:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 11:26:49,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164055136] [2020-07-20 11:26:49,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:26:49,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 11:26:49,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165375607] [2020-07-20 11:26:49,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:26:49,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:26:49,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:26:49,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:26:49,952 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-07-20 11:26:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:26:50,172 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-07-20 11:26:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:26:50,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-07-20 11:26:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:26:50,176 INFO L225 Difference]: With dead ends: 73 [2020-07-20 11:26:50,176 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:26:50,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:26:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:26:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-20 11:26:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 11:26:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-20 11:26:50,192 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 47 [2020-07-20 11:26:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:26:50,192 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-20 11:26:50,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:26:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-20 11:26:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 11:26:50,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:26:50,195 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:26:50,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:50,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:26:50,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:26:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-20 11:26:50,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:26:50,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916499798] [2020-07-20 11:26:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:26:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:26:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:26:50,741 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-20 11:26:50,742 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-20 11:26:50,742 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:50,748 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:50,749 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:50,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-20 11:26:50,795 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:26:50,799 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:26:50,835 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:26:50,885 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:26:50,887 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:50,889 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:50,889 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:50,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:1 [2020-07-20 11:26:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 11:26:50,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:26:50,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916499798] [2020-07-20 11:26:50,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:26:50,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 11:26:50,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222094432] [2020-07-20 11:26:50,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:26:50,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:26:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:26:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:26:50,898 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-07-20 11:26:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:26:51,215 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-20 11:26:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:26:51,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-07-20 11:26:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:26:51,224 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:26:51,225 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:26:51,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:26:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:26:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-20 11:26:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:26:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 11:26:51,248 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-20 11:26:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:26:51,248 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 11:26:51,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:26:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 11:26:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 11:26:51,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:26:51,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:26:51,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:51,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:26:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:26:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-20 11:26:51,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:26:51,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702594947] [2020-07-20 11:26:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:26:51,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:26:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:26:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 11:26:51,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:26:51,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702594947] [2020-07-20 11:26:51,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:26:51,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:26:51,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284326470] [2020-07-20 11:26:51,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:26:51,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:26:51,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:26:51,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:26:51,651 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-20 11:26:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:26:51,744 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 11:26:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:26:51,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-20 11:26:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:26:51,747 INFO L225 Difference]: With dead ends: 54 [2020-07-20 11:26:51,747 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:26:51,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:26:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:26:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 11:26:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:26:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-20 11:26:51,784 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-20 11:26:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:26:51,784 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-20 11:26:51,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:26:51,785 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-20 11:26:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 11:26:51,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:26:51,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:26:51,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:51,998 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:26:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:26:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-20 11:26:51,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:26:52,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294685262] [2020-07-20 11:26:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:26:52,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 11:26:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:26:52,156 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:26:52,157 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:52,161 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:52,162 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:52,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 11:26:52,183 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-20 11:26:52,183 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-20 11:26:52,184 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:52,189 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:52,189 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:52,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:13 [2020-07-20 11:26:52,266 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:26:52,267 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:52,278 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:52,283 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:26:52,284 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:52,295 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:52,296 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:26:52,296 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:46 [2020-07-20 11:26:53,106 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 11:26:53,776 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 11:26:53,817 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:53,817 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2020-07-20 11:26:53,818 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:53,833 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:26:53,843 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-20 11:26:53,845 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:53,853 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:53,854 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:53,855 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-07-20 11:26:54,026 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2020-07-20 11:26:54,028 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:54,041 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:54,045 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-07-20 11:26:54,046 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:54,052 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:54,053 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:54,053 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-07-20 11:26:54,081 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:26:54,083 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:54,085 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:54,085 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:54,085 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 11:26:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 11:26:54,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:26:54,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:26:54,630 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:26:54,638 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:54,640 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 11:26:54,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2020-07-20 11:26:54,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294685262] [2020-07-20 11:26:54,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:26:54,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 11:26:54,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741567672] [2020-07-20 11:26:54,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:26:54,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:26:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:26:54,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:26:54,700 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 18 states. [2020-07-20 11:26:55,826 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 11:26:57,777 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:26:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:26:58,648 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-07-20 11:26:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 11:26:58,650 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-20 11:26:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:26:58,651 INFO L225 Difference]: With dead ends: 55 [2020-07-20 11:26:58,652 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 11:26:58,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 11:26:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 11:26:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-20 11:26:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 11:26:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-20 11:26:58,675 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-20 11:26:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:26:58,676 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-20 11:26:58,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:26:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-20 11:26:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 11:26:58,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:26:58,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:26:58,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:58,900 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:26:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:26:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-20 11:26:58,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:26:58,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155976785] [2020-07-20 11:26:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:26:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:26:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 101 conjunts are in the unsatisfiable core [2020-07-20 11:26:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:26:59,079 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:26:59,080 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:59,086 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:59,087 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:59,087 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 11:26:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:26:59,106 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-20 11:26:59,106 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:59,116 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:59,118 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:26:59,118 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-20 11:26:59,208 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:26:59,209 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:59,225 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:59,234 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:26:59,234 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:26:59,248 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:26:59,249 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:26:59,250 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2020-07-20 11:26:59,896 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 11:27:00,836 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 11:27:00,877 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:00,878 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 69 [2020-07-20 11:27:00,880 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:00,918 INFO L624 ElimStorePlain]: treesize reduction 32, result has 69.8 percent of original size [2020-07-20 11:27:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:27:00,927 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2020-07-20 11:27:00,928 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:00,948 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:00,949 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:27:00,949 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:52 [2020-07-20 11:27:01,103 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:01,143 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:01,148 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:01,172 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:01,176 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:01,194 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:01,198 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:01,219 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:01,221 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:01,221 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-20 11:27:09,522 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:27:15,147 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:27:15,184 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:15,185 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-07-20 11:27:15,186 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:15,217 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:27:15,229 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2020-07-20 11:27:15,231 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:15,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:27:15,270 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2020-07-20 11:27:15,271 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:15,314 INFO L624 ElimStorePlain]: treesize reduction 4, result has 95.1 percent of original size [2020-07-20 11:27:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:27:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:27:15,323 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-20 11:27:15,324 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:15,348 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:15,350 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:27:15,350 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:103, output treesize:77 [2020-07-20 11:27:15,625 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:27:15,627 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:27:15,756 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:27:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:27:15,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:27:16,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:27:16,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:27:16,511 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:27:16,740 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 11:27:16,849 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.offset_71|, |v_#memory_$Pointer$.base_71|], 2=[|v_#memory_int_67|], 3=[|v_#memory_$Pointer$.offset_70|, |v_#memory_$Pointer$.base_70|]} [2020-07-20 11:27:16,853 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:16,880 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:16,884 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:27:16,918 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:16,925 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:16,939 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:16,946 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:16,958 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:16,961 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:16,970 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:27:16,971 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-20 11:27:16,971 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:125, output treesize:59 [2020-07-20 11:27:17,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155976785] [2020-07-20 11:27:17,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:27:17,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 11:27:17,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247185503] [2020-07-20 11:27:17,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:27:17,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:27:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:27:17,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=782, Unknown=4, NotChecked=0, Total=870 [2020-07-20 11:27:17,069 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 21 states. [2020-07-20 11:27:29,488 WARN L193 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-07-20 11:27:39,609 WARN L193 SmtUtils]: Spent 9.98 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-07-20 11:27:48,014 WARN L193 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-07-20 11:28:01,410 WARN L193 SmtUtils]: Spent 7.21 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-07-20 11:28:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:28:04,761 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-07-20 11:28:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 11:28:04,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-20 11:28:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:28:04,764 INFO L225 Difference]: With dead ends: 65 [2020-07-20 11:28:04,764 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 11:28:04,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=212, Invalid=1761, Unknown=7, NotChecked=0, Total=1980 [2020-07-20 11:28:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 11:28:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-07-20 11:28:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 11:28:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-07-20 11:28:04,776 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 53 [2020-07-20 11:28:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:28:04,777 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-07-20 11:28:04,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:28:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-07-20 11:28:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 11:28:04,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:28:04,779 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:28:04,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:04,993 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:28:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:28:04,994 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 1 times [2020-07-20 11:28:04,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:28:04,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568436476] [2020-07-20 11:28:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:28:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 11:28:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:28:05,158 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:28:05,168 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:28:05,169 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:05,174 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:28:05,174 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:05,190 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:05,191 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 11:28:05,192 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:23 [2020-07-20 11:28:05,287 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_73|], 2=[|v_#memory_$Pointer$.base_74|, |v_#memory_$Pointer$.base_76|]} [2020-07-20 11:28:05,295 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:28:05,296 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:05,305 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:28:05,305 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:05,350 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:05,354 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:28:05,360 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:28:05,398 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:05,402 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:05,404 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:05,433 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:05,434 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-20 11:28:05,435 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:129, output treesize:67 [2020-07-20 11:28:07,370 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:28:09,259 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:28:09,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:28:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 11:28:09,288 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:09,288 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 44 [2020-07-20 11:28:09,289 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:28:09,290 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:09,317 INFO L624 ElimStorePlain]: treesize reduction 16, result has 71.9 percent of original size [2020-07-20 11:28:09,318 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:28:09,319 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-07-20 11:28:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:28:09,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:28:09,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:28:10,004 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_89|], 3=[|v_#memory_$Pointer$.base_88|]} [2020-07-20 11:28:10,009 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:10,018 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:10,038 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:10,042 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:28:10,045 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:28:10,058 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:10,059 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-07-20 11:28:10,059 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:109, output treesize:51 [2020-07-20 11:28:18,351 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 11:28:18,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568436476] [2020-07-20 11:28:18,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:28:18,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 11:28:18,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984076137] [2020-07-20 11:28:18,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:28:18,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:28:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:28:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=497, Unknown=2, NotChecked=0, Total=600 [2020-07-20 11:28:18,356 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 18 states. [2020-07-20 11:28:20,485 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-07-20 11:28:24,866 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-07-20 11:28:26,987 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-07-20 11:28:29,560 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-07-20 11:28:42,891 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-07-20 11:28:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:28:43,385 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-07-20 11:28:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 11:28:43,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-20 11:28:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:28:43,389 INFO L225 Difference]: With dead ends: 75 [2020-07-20 11:28:43,389 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 11:28:43,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=375, Invalid=1600, Unknown=5, NotChecked=0, Total=1980 [2020-07-20 11:28:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 11:28:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-20 11:28:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 11:28:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-20 11:28:43,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-20 11:28:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:28:43,400 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-20 11:28:43,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:28:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-20 11:28:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 11:28:43,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:28:43,402 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2020-07-20 11:28:43,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:43,615 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:28:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:28:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-20 11:28:43,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:28:43,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288238165] [2020-07-20 11:28:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:28:44,142 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:28:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:28:44,237 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:28:44,301 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:28:44,301 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:28:44,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:44,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:28:44 BoogieIcfgContainer [2020-07-20 11:28:44,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:28:44,597 INFO L168 Benchmark]: Toolchain (without parser) took 117344.18 ms. Allocated memory was 144.2 MB in the beginning and 346.6 MB in the end (delta: 202.4 MB). Free memory was 100.6 MB in the beginning and 313.8 MB in the end (delta: -213.2 MB). Peak memory consumption was 208.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:44,598 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:28:44,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 727.04 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.2 MB in the beginning and 167.7 MB in the end (delta: -67.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:44,599 INFO L168 Benchmark]: Boogie Preprocessor took 74.13 ms. Allocated memory is still 201.9 MB. Free memory was 167.7 MB in the beginning and 165.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:44,600 INFO L168 Benchmark]: RCFGBuilder took 681.29 ms. Allocated memory is still 201.9 MB. Free memory was 165.0 MB in the beginning and 120.4 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:44,600 INFO L168 Benchmark]: TraceAbstraction took 115853.12 ms. Allocated memory was 201.9 MB in the beginning and 346.6 MB in the end (delta: 144.7 MB). Free memory was 119.7 MB in the beginning and 313.8 MB in the end (delta: -194.1 MB). Peak memory consumption was 170.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:44,603 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 727.04 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.2 MB in the beginning and 167.7 MB in the end (delta: -67.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.13 ms. Allocated memory is still 201.9 MB. Free memory was 167.7 MB in the beginning and 165.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 681.29 ms. Allocated memory is still 201.9 MB. Free memory was 165.0 MB in the beginning and 120.4 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 115853.12 ms. Allocated memory was 201.9 MB in the beginning and 346.6 MB in the end (delta: 144.7 MB). Free memory was 119.7 MB in the beginning and 313.8 MB in the end (delta: -194.1 MB). Peak memory consumption was 170.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; VAL [\old(head)=10, \old(head)=9, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={-4:0}, malloc(sizeof(mlist))={-4:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={-4:0}, malloc(sizeof(mlist))={-4:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-4:0}, k=2, l={-4:0}, l={11:12}, malloc(sizeof(mlist))={-4:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={-4:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=-4, \old(head)=0, \old(k)=5, head={-4:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-4, \old(head)=0, \old(k)=5, head={-4:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-4, \old(k)=5, head={-4:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-4, \old(k)=5, \result=0, head={-3:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-3:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-3, \old(k)=1, head={-3:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-3, \old(k)=1, head={-3:0}, k=1, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-3, \old(head)=0, \old(k)=1, head={-3:0}, k=1, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-3, \old(head)=0, \old(k)=1, \result=0, head={-2:0}, k=1, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={-2:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=0, \old(head)=-2, \old(k)=3, head={-2:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-2, \old(head)=0, \old(k)=3, head={-2:0}, k=3, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-2, \old(k)=3, head={-2:0}, k=3, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-2, \old(head)=0, \old(k)=3, \result=0, head={-1:0}, k=3, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,3)=0, mylist={11:12}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, l={-1:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, k=2, l={-1:0}, l={-1:0}] [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, k=2, l={-1:0}, l={-1:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, k=2, l={-1:0}, l={-2:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, k=2, l={-3:0}, l={-1:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, k=2, l={-1:0}, l={-4:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result={-4:0}, head={-1:0}, k=2, l={-1:0}, l={-4:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={-1:0}, mylist={11:12}, search_list(head,2)={-4:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={-1:0}, mylist={11:12}, temp={-4:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={-1:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-1:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 115.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 77.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 215 SDtfs, 298 SDslu, 613 SDs, 0 SdLazy, 1742 SolverSat, 181 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 94.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, 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, 7 MinimizatonAttempts, 41 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 34.3s InterpolantComputationTime, 398 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 381 ConstructedInterpolants, 12 QuantifiedInterpolants, 220621 SizeOfPredicates, 84 NumberOfNonLiveVariables, 2355 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 209/261 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...