/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/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:23:08,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:23:08,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:23:08,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:23:08,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:23:08,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:23:08,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:23:08,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:23:08,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:23:09,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:23:09,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:23:09,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:23:09,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:23:09,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:23:09,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:23:09,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:23:09,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:23:09,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:23:09,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:23:09,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:23:09,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:23:09,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:23:09,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:23:09,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:23:09,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:23:09,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:23:09,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:23:09,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:23:09,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:23:09,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:23:09,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:23:09,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:23:09,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:23:09,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:23:09,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:23:09,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:23:09,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:23:09,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:23:09,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:23:09,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:23:09,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:23:09,056 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 [2020-07-21 11:23:09,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:23:09,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:23:09,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:23:09,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:23:09,090 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:23:09,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:23:09,090 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:23:09,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:23:09,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:23:09,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:23:09,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:23:09,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:23:09,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:23:09,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:23:09,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:23:09,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:23:09,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:23:09,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:23:09,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:23:09,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:23:09,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:23:09,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:23:09,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:23:09,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:23:09,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:23:09,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:23:09,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:09,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:23:09,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:23:09,098 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 [2020-07-21 11:23:09,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:23:09,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:23:09,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:23:09,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:23:09,425 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:23:09,426 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 11:23:09,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c5deadd/ac6f6d25abfb427d918b816a82dbab8d/FLAG5ee46e400 [2020-07-21 11:23:10,135 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:23:10,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 11:23:10,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c5deadd/ac6f6d25abfb427d918b816a82dbab8d/FLAG5ee46e400 [2020-07-21 11:23:10,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c5deadd/ac6f6d25abfb427d918b816a82dbab8d [2020-07-21 11:23:10,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:23:10,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:23:10,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:10,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:23:10,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:23:10,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:10" (1/1) ... [2020-07-21 11:23:10,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39811443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:10, skipping insertion in model container [2020-07-21 11:23:10,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:10" (1/1) ... [2020-07-21 11:23:10,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:23:10,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:23:10,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:10,960 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:23:11,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:11,075 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:23:11,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11 WrapperNode [2020-07-21 11:23:11,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:11,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:23:11,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:23:11,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:23:11,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (1/1) ... [2020-07-21 11:23:11,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:23:11,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:23:11,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:23:11,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:23:11,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (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 [2020-07-21 11:23:11,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:23:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:23:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:23:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:23:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:23:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:23:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:23:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:23:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:23:11,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:23:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:23:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:23:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:23:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:23:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:23:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:23:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:23:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:23:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:23:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:23:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:23:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:23:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:23:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:23:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:23:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:23:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:23:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:23:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:23:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:23:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:23:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:23:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:23:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:23:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:23:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:23:11,258 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:23:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:23:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:23:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:23:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:23:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:23:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:23:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:23:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:23:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:23:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:23:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:23:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:23:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:23:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:23:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:23:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:23:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:23:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:23:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:23:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:23:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:23:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:23:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:23:11,265 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:23:11,265 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:23:11,265 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:23:11,265 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:23:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:23:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:23:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:23:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:23:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:23:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:23:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:23:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:23:11,268 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:23:11,268 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:23:11,268 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:23:11,269 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:23:11,269 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:23:11,270 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:23:11,270 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:23:11,270 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:23:11,270 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:23:11,270 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:23:11,270 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:23:11,271 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:23:11,272 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:23:11,272 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:23:11,272 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:23:11,272 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:23:11,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:23:11,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:23:11,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:23:12,014 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:23:12,015 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-21 11:23:12,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:12 BoogieIcfgContainer [2020-07-21 11:23:12,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:23:12,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:23:12,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:23:12,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:23:12,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:10" (1/3) ... [2020-07-21 11:23:12,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4d0359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:12, skipping insertion in model container [2020-07-21 11:23:12,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:11" (2/3) ... [2020-07-21 11:23:12,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4d0359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:12, skipping insertion in model container [2020-07-21 11:23:12,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:12" (3/3) ... [2020-07-21 11:23:12,035 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-21 11:23:12,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:23:12,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-21 11:23:12,085 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-21 11:23:12,122 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:23:12,122 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:23:12,123 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:23:12,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:23:12,125 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:23:12,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:23:12,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:23:12,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:23:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-21 11:23:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 11:23:12,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:12,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:12,169 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:12,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-21 11:23:12,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:12,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638365684] [2020-07-21 11:23:12,183 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 [2020-07-21 11:23:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:23:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:12,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:12,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638365684] [2020-07-21 11:23:12,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:12,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:23:12,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937699954] [2020-07-21 11:23:12,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:23:12,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:23:12,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:12,435 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-21 11:23:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:12,517 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-21 11:23:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:12,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 11:23:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:12,531 INFO L225 Difference]: With dead ends: 186 [2020-07-21 11:23:12,531 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 11:23:12,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 11:23:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-21 11:23:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 11:23:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-21 11:23:12,586 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-21 11:23:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:12,587 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-21 11:23:12,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:23:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-21 11:23:12,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:23:12,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:12,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:12,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:12,805 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-21 11:23:12,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:12,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898612763] [2020-07-21 11:23:12,806 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 [2020-07-21 11:23:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:12,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:23:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:12,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:12,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898612763] [2020-07-21 11:23:12,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:12,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:23:12,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449139638] [2020-07-21 11:23:12,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:23:12,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:23:12,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:12,908 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 3 states. [2020-07-21 11:23:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:12,931 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-07-21 11:23:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:12,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 11:23:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:12,934 INFO L225 Difference]: With dead ends: 84 [2020-07-21 11:23:12,934 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 11:23:12,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 11:23:12,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-07-21 11:23:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 11:23:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-07-21 11:23:12,960 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-07-21 11:23:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:12,960 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-07-21 11:23:12,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:23:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-07-21 11:23:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:23:12,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:12,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:13,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:13,180 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-21 11:23:13,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:13,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411600764] [2020-07-21 11:23:13,181 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 [2020-07-21 11:23:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:13,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:23:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:13,414 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 [2020-07-21 11:23:13,414 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:13,423 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:13,428 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 [2020-07-21 11:23:13,429 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:13,435 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:13,435 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:13,436 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 11:23:13,462 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:13,464 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:13,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:13,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411600764] [2020-07-21 11:23:13,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:13,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:23:13,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637117857] [2020-07-21 11:23:13,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:23:13,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:23:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:23:13,478 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 4 states. [2020-07-21 11:23:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:13,606 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-07-21 11:23:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:23:13,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 11:23:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:13,609 INFO L225 Difference]: With dead ends: 138 [2020-07-21 11:23:13,609 INFO L226 Difference]: Without dead ends: 136 [2020-07-21 11:23:13,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-21 11:23:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-07-21 11:23:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 11:23:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-07-21 11:23:13,622 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-07-21 11:23:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:13,622 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-07-21 11:23:13,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:23:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-07-21 11:23:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:23:13,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:13,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:13,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:13,839 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-21 11:23:13,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:13,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774468897] [2020-07-21 11:23:13,841 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 [2020-07-21 11:23:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:23:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:13,963 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 [2020-07-21 11:23:13,963 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:13,990 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:13,991 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:13,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 11:23:14,025 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,026 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 11:23:14,027 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,045 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,048 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_36|], 8=[|v_#memory_$Pointer$.base_36|]} [2020-07-21 11:23:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:14,055 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,068 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:14,087 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-21 11:23:14,088 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2020-07-21 11:23:14,088 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,099 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,101 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:23:14,102 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-21 11:23:14,125 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:23:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:14,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:14,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774468897] [2020-07-21 11:23:14,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:14,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:23:14,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299489499] [2020-07-21 11:23:14,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:23:14,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:23:14,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:14,138 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-07-21 11:23:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:14,383 INFO L93 Difference]: Finished difference Result 221 states and 244 transitions. [2020-07-21 11:23:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:23:14,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 11:23:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:14,387 INFO L225 Difference]: With dead ends: 221 [2020-07-21 11:23:14,388 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 11:23:14,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:23:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 11:23:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 81. [2020-07-21 11:23:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 11:23:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-21 11:23:14,401 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 14 [2020-07-21 11:23:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:14,401 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-21 11:23:14,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:23:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-21 11:23:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:23:14,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:14,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:14,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:14,618 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-07-21 11:23:14,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:14,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833643574] [2020-07-21 11:23:14,620 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 [2020-07-21 11:23:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:23:14,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:14,720 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 [2020-07-21 11:23:14,720 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,722 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,723 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 11:23:14,753 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,753 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 11:23:14,754 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,763 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:14,766 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,772 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:14,773 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:14,773 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-21 11:23:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:14,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:14,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833643574] [2020-07-21 11:23:14,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:14,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:23:14,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901826248] [2020-07-21 11:23:14,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:23:14,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:23:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:14,782 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 5 states. [2020-07-21 11:23:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:14,903 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-07-21 11:23:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:23:14,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 11:23:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:14,905 INFO L225 Difference]: With dead ends: 126 [2020-07-21 11:23:14,905 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 11:23:14,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:23:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 11:23:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-21 11:23:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 11:23:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-07-21 11:23:14,914 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-07-21 11:23:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:14,915 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-07-21 11:23:14,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:23:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-07-21 11:23:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:23:14,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:14,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:15,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:15,130 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1214805939, now seen corresponding path program 1 times [2020-07-21 11:23:15,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:15,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728222723] [2020-07-21 11:23:15,132 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 [2020-07-21 11:23:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:23:15,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:15,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:15,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728222723] [2020-07-21 11:23:15,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:15,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:23:15,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165192798] [2020-07-21 11:23:15,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:23:15,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:23:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:15,249 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 5 states. [2020-07-21 11:23:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:15,354 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-07-21 11:23:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:23:15,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 11:23:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:15,356 INFO L225 Difference]: With dead ends: 136 [2020-07-21 11:23:15,356 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 11:23:15,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:23:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 11:23:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-21 11:23:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 11:23:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-21 11:23:15,365 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-07-21 11:23:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:15,365 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-21 11:23:15,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:23:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-21 11:23:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:23:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:15,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:15,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:15,580 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122782, now seen corresponding path program 1 times [2020-07-21 11:23:15,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:15,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052236857] [2020-07-21 11:23:15,583 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 [2020-07-21 11:23:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:23:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:15,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:15,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052236857] [2020-07-21 11:23:15,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:15,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:23:15,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872398967] [2020-07-21 11:23:15,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:23:15,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:23:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:15,680 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 3 states. [2020-07-21 11:23:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:15,702 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-07-21 11:23:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:15,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:23:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:15,704 INFO L225 Difference]: With dead ends: 102 [2020-07-21 11:23:15,704 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 11:23:15,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 11:23:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-21 11:23:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 11:23:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-07-21 11:23:15,716 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 24 [2020-07-21 11:23:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:15,716 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-07-21 11:23:15,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:23:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-07-21 11:23:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:23:15,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:15,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:15,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:15,932 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash -481740404, now seen corresponding path program 1 times [2020-07-21 11:23:15,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:15,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091082772] [2020-07-21 11:23:15,934 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 [2020-07-21 11:23:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:23:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:16,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:16,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091082772] [2020-07-21 11:23:16,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:16,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:23:16,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912647299] [2020-07-21 11:23:16,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:23:16,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:16,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:23:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:16,040 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 3 states. [2020-07-21 11:23:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:16,072 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-07-21 11:23:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:16,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:23:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:16,075 INFO L225 Difference]: With dead ends: 78 [2020-07-21 11:23:16,075 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 11:23:16,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 11:23:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 11:23:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 11:23:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-07-21 11:23:16,089 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 25 [2020-07-21 11:23:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:16,092 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-07-21 11:23:16,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:23:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-07-21 11:23:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:23:16,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:16,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:16,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:16,311 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:16,311 INFO L82 PathProgramCache]: Analyzing trace with hash -611625627, now seen corresponding path program 1 times [2020-07-21 11:23:16,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:16,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800032463] [2020-07-21 11:23:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 11:23:16,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:16,422 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 [2020-07-21 11:23:16,423 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:16,436 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:16,456 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 [2020-07-21 11:23:16,456 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:16,467 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:16,467 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:16,468 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 11:23:16,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:16,488 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:16,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:16,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800032463] [2020-07-21 11:23:16,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:16,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:23:16,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065057952] [2020-07-21 11:23:16,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:23:16,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:23:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:23:16,510 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 4 states. [2020-07-21 11:23:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:16,634 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-07-21 11:23:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:23:16,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 11:23:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:16,635 INFO L225 Difference]: With dead ends: 86 [2020-07-21 11:23:16,636 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 11:23:16,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 11:23:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-07-21 11:23:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 11:23:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-07-21 11:23:16,643 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 27 [2020-07-21 11:23:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:16,644 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-07-21 11:23:16,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:23:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-07-21 11:23:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:23:16,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:16,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:16,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:16,859 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash -609778585, now seen corresponding path program 1 times [2020-07-21 11:23:16,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:16,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112648933] [2020-07-21 11:23:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 11:23:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:16,986 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 [2020-07-21 11:23:16,986 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:16,989 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:16,990 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:16,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 11:23:17,033 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:17,034 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 17 treesize of output 39 [2020-07-21 11:23:17,036 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:17,062 INFO L624 ElimStorePlain]: treesize reduction 14, result has 77.4 percent of original size [2020-07-21 11:23:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:17,067 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:17,075 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:17,077 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:23:17,078 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:50, output treesize:15 [2020-07-21 11:23:17,143 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:17,144 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 16 treesize of output 26 [2020-07-21 11:23:17,145 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:17,174 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:17,178 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_40|], 8=[|v_#memory_$Pointer$.offset_39|]} [2020-07-21 11:23:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:17,189 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:17,209 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:17,220 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2020-07-21 11:23:17,220 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:17,237 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:17,240 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:23:17,240 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:194, output treesize:42 [2020-07-21 11:23:17,262 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:17,263 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:17,379 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:17,384 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:17,385 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:17,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:17,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112648933] [2020-07-21 11:23:17,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:17,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 11:23:17,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395875005] [2020-07-21 11:23:17,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:23:17,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:23:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:23:17,412 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 8 states. [2020-07-21 11:23:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:17,966 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-07-21 11:23:17,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:23:17,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-21 11:23:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:17,967 INFO L225 Difference]: With dead ends: 153 [2020-07-21 11:23:17,967 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 11:23:17,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:23:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 11:23:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 74. [2020-07-21 11:23:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 11:23:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-07-21 11:23:17,981 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 27 [2020-07-21 11:23:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:17,982 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-07-21 11:23:17,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:23:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-07-21 11:23:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:23:17,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:17,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:18,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:18,200 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2038545261, now seen corresponding path program 1 times [2020-07-21 11:23:18,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:18,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633721426] [2020-07-21 11:23:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:23:18,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:18,305 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2020-07-21 11:23:18,305 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:18,313 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:18,317 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 [2020-07-21 11:23:18,318 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:18,324 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:18,324 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:18,325 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-07-21 11:23:18,363 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 [2020-07-21 11:23:18,364 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:18,373 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:18,375 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 [2020-07-21 11:23:18,376 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:18,394 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:18,395 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:18,395 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 11:23:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:18,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:18,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633721426] [2020-07-21 11:23:18,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:18,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:23:18,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559555213] [2020-07-21 11:23:18,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:23:18,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:23:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:23:18,424 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 6 states. [2020-07-21 11:23:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:18,698 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2020-07-21 11:23:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:23:18,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 11:23:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:18,700 INFO L225 Difference]: With dead ends: 200 [2020-07-21 11:23:18,700 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 11:23:18,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:23:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 11:23:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 96. [2020-07-21 11:23:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 11:23:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-07-21 11:23:18,710 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 28 [2020-07-21 11:23:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:18,710 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-07-21 11:23:18,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:23:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-07-21 11:23:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:23:18,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:18,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:18,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:18,926 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-21 11:23:18,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:18,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967069518] [2020-07-21 11:23:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:19,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 11:23:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:19,028 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 [2020-07-21 11:23:19,028 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,033 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,033 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 11:23:19,068 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,068 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 11 treesize of output 15 [2020-07-21 11:23:19,069 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,099 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:19,128 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-21 11:23:19,128 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-21 11:23:19,129 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,151 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:19,162 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-21 11:23:19,163 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,185 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,186 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,187 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-21 11:23:19,268 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 11:23:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:19,283 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-21 11:23:19,284 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 55 [2020-07-21 11:23:19,286 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:23:19,287 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:23:19,288 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:23:19,313 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-21 11:23:19,326 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,327 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2020-07-21 11:23:19,328 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,333 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:19,334 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:19,334 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-21 11:23:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:19,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:19,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967069518] [2020-07-21 11:23:19,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:19,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:23:19,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840087850] [2020-07-21 11:23:19,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:23:19,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:23:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:23:19,357 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-07-21 11:23:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:20,136 INFO L93 Difference]: Finished difference Result 238 states and 266 transitions. [2020-07-21 11:23:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:23:20,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 11:23:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:20,139 INFO L225 Difference]: With dead ends: 238 [2020-07-21 11:23:20,139 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 11:23:20,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:23:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 11:23:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 108. [2020-07-21 11:23:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 11:23:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-07-21 11:23:20,150 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 28 [2020-07-21 11:23:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:20,151 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-07-21 11:23:20,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:23:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-07-21 11:23:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:23:20,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:20,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:20,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:20,368 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1176203735, now seen corresponding path program 1 times [2020-07-21 11:23:20,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:20,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313310911] [2020-07-21 11:23:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:23:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:23:20,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:20,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313310911] [2020-07-21 11:23:20,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:20,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:23:20,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006283214] [2020-07-21 11:23:20,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:23:20,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:23:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:20,509 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 3 states. [2020-07-21 11:23:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:20,562 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-07-21 11:23:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:20,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 11:23:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:20,565 INFO L225 Difference]: With dead ends: 109 [2020-07-21 11:23:20,565 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 11:23:20,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:23:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 11:23:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-07-21 11:23:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 11:23:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-07-21 11:23:20,577 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 30 [2020-07-21 11:23:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:20,577 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-07-21 11:23:20,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:23:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-07-21 11:23:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:23:20,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:20,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:20,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:20,798 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-21 11:23:20,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:20,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699347265] [2020-07-21 11:23:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:20,908 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:20,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:20,966 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:23:20,966 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:23:21,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:21,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:23:21 BoogieIcfgContainer [2020-07-21 11:23:21,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:23:21,224 INFO L168 Benchmark]: Toolchain (without parser) took 10849.92 ms. Allocated memory was 143.1 MB in the beginning and 308.3 MB in the end (delta: 165.2 MB). Free memory was 101.3 MB in the beginning and 204.9 MB in the end (delta: -103.6 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:21,225 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 11:23:21,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.11 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 100.9 MB in the beginning and 170.5 MB in the end (delta: -69.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:21,226 INFO L168 Benchmark]: Boogie Preprocessor took 84.51 ms. Allocated memory is still 203.4 MB. Free memory was 170.5 MB in the beginning and 167.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:21,226 INFO L168 Benchmark]: RCFGBuilder took 857.10 ms. Allocated memory is still 203.4 MB. Free memory was 167.4 MB in the beginning and 111.0 MB in the end (delta: 56.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:21,227 INFO L168 Benchmark]: TraceAbstraction took 9196.70 ms. Allocated memory was 203.4 MB in the beginning and 308.3 MB in the end (delta: 104.9 MB). Free memory was 111.0 MB in the beginning and 204.9 MB in the end (delta: -93.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:21,229 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 698.11 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 100.9 MB in the beginning and 170.5 MB in the end (delta: -69.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.51 ms. Allocated memory is still 203.4 MB. Free memory was 170.5 MB in the beginning and 167.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 857.10 ms. Allocated memory is still 203.4 MB. Free memory was 167.4 MB in the beginning and 111.0 MB in the end (delta: 56.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9196.70 ms. Allocated memory was 203.4 MB in the beginning and 308.3 MB in the end (delta: 104.9 MB). Free memory was 111.0 MB in the beginning and 204.9 MB in the end (delta: -93.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) VAL [list={21239:0}, malloc(sizeof(SLL))={21239:0}] [L995] COND FALSE !(!(list != ((void*)0))) VAL [list={21239:0}, malloc(sizeof(SLL))={21239:0}] [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={21239:0}, list->inner={-1:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; VAL [end={21239:0}, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={21239:0}, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={21239:0}, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner VAL [end={21239:0}, inner={-1:0}, len=0, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1023] COND TRUE len == 0 [L1024] len = 1 VAL [end={21239:0}, inner={-1:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1027] COND FALSE !(!(((void*)0) != inner)) VAL [end={21239:0}, inner={-1:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR inner->inner VAL [end={21239:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next VAL [end={21239:0}, inner={-1:0}, inner->next={0:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() VAL [end={21239:0}, inner={-1:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={21239:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1042 SDtfs, 1361 SDslu, 1740 SDs, 0 SdLazy, 805 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=12, 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, 13 MinimizatonAttempts, 522 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 265 ConstructedInterpolants, 14 QuantifiedInterpolants, 57705 SizeOfPredicates, 82 NumberOfNonLiveVariables, 1095 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...