/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 [2020-07-20 11:31:16,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:16,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:16,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:16,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:16,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:16,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:16,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:16,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:16,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:16,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:16,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:16,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:16,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:16,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:16,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:16,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:16,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:16,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:16,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:16,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:16,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:16,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:16,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:16,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:16,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:16,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:16,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:16,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:16,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:16,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:16,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:16,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:16,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:16,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:16,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:16,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:16,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:16,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:16,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:16,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:16,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:31:16,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:16,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:16,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:16,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:16,304 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:16,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:16,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:16,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:16,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:16,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:16,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:16,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:16,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:16,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:16,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:16,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:16,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:16,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:16,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:16,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:16,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:16,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:16,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:16,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:16,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:16,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:16,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:16,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:16,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:16,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:31:16,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:16,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:16,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:16,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:16,614 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:16,615 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-20 11:31:16,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da4d0700/8acfc6392ffb49f6972481f71e6e2e1a/FLAGfd085da8c [2020-07-20 11:31:17,238 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:17,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-20 11:31:17,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da4d0700/8acfc6392ffb49f6972481f71e6e2e1a/FLAGfd085da8c [2020-07-20 11:31:17,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da4d0700/8acfc6392ffb49f6972481f71e6e2e1a [2020-07-20 11:31:17,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:17,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:17,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:17,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:17,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:17,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:17" (1/1) ... [2020-07-20 11:31:17,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699aeaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:17, skipping insertion in model container [2020-07-20 11:31:17,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:17" (1/1) ... [2020-07-20 11:31:17,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:17,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:18,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:18,065 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:18,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:18,167 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:18,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18 WrapperNode [2020-07-20 11:31:18,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:18,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:18,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:18,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:18,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... [2020-07-20 11:31:18,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:18,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:18,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:18,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:18,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:18,324 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:18,325 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:18,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:18,989 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-20 11:31:18,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:18 BoogieIcfgContainer [2020-07-20 11:31:18,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:18,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:18,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:18,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:18,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:17" (1/3) ... [2020-07-20 11:31:19,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429a58c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:18, skipping insertion in model container [2020-07-20 11:31:19,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:18" (2/3) ... [2020-07-20 11:31:19,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429a58c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:19, skipping insertion in model container [2020-07-20 11:31:19,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:18" (3/3) ... [2020-07-20 11:31:19,002 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-20 11:31:19,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:19,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-20 11:31:19,036 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-20 11:31:19,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:19,063 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:19,063 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:19,063 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:19,063 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:19,064 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:19,064 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:19,064 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-20 11:31:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 11:31:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:19,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:19,116 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]=== [2020-07-20 11:31:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-20 11:31:19,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:19,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443456451] [2020-07-20 11:31:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:31:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:19,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:19,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443456451] [2020-07-20 11:31:19,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:19,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:31:19,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463653460] [2020-07-20 11:31:19,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:31:19,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:31:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:19,373 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-20 11:31:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:19,440 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-20 11:31:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:19,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 11:31:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:19,454 INFO L225 Difference]: With dead ends: 186 [2020-07-20 11:31:19,455 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 11:31:19,459 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 [2020-07-20 11:31:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 11:31:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-20 11:31:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 11:31:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-20 11:31:19,505 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-20 11:31:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:19,506 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-20 11:31:19,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:31:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-20 11:31:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:19,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:19,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:19,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:19,721 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]=== [2020-07-20 11:31:19,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:19,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-20 11:31:19,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:19,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922970012] [2020-07-20 11:31:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:31:19,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:19,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:19,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922970012] [2020-07-20 11:31:19,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:19,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:31:19,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525702460] [2020-07-20 11:31:19,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:31:19,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:31:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:19,831 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 3 states. [2020-07-20 11:31:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:19,856 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-07-20 11:31:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:19,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 11:31:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:19,860 INFO L225 Difference]: With dead ends: 84 [2020-07-20 11:31:19,860 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 11:31:19,864 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 [2020-07-20 11:31:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 11:31:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-07-20 11:31:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 11:31:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-07-20 11:31:19,882 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-07-20 11:31:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:19,886 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-07-20 11:31:19,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:31:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-07-20 11:31:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:19,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:19,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:20,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:20,102 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]=== [2020-07-20 11:31:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-20 11:31:20,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:20,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880169552] [2020-07-20 11:31:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:31:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:20,259 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:31:20,260 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,268 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,275 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:31:20,276 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,284 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,285 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,285 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 11:31:20,311 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:20,312 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:20,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:20,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880169552] [2020-07-20 11:31:20,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:20,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:20,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383153083] [2020-07-20 11:31:20,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:20,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:20,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:20,328 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 4 states. [2020-07-20 11:31:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:20,442 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-07-20 11:31:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:20,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 11:31:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:20,445 INFO L225 Difference]: With dead ends: 138 [2020-07-20 11:31:20,445 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 11:31:20,446 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 [2020-07-20 11:31:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 11:31:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-07-20 11:31:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 11:31:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-07-20 11:31:20,463 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-07-20 11:31:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:20,463 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-07-20 11:31:20,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-07-20 11:31:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:20,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:20,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:20,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:20,682 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]=== [2020-07-20 11:31:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-20 11:31:20,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:20,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599014629] [2020-07-20 11:31:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:31:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:20,853 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:31:20,854 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,856 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,856 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 11:31:20,886 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,887 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 [2020-07-20 11:31:20,888 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,908 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,911 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_36|], 8=[|v_#memory_$Pointer$.base_36|]} [2020-07-20 11:31:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:20,916 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,932 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:20,951 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 11:31:20,952 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 [2020-07-20 11:31:20,952 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:20,964 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:20,966 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. [2020-07-20 11:31:20,966 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-20 11:31:20,990 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 11:31:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:21,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:21,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599014629] [2020-07-20 11:31:21,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:21,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:21,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358109764] [2020-07-20 11:31:21,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:21,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:21,004 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-07-20 11:31:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:21,201 INFO L93 Difference]: Finished difference Result 221 states and 244 transitions. [2020-07-20 11:31:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:31:21,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:31:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:21,205 INFO L225 Difference]: With dead ends: 221 [2020-07-20 11:31:21,205 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 11:31:21,206 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 [2020-07-20 11:31:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 11:31:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 81. [2020-07-20 11:31:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 11:31:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-20 11:31:21,216 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 14 [2020-07-20 11:31:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:21,217 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-20 11:31:21,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-20 11:31:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:31:21,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:21,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:21,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:21,433 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]=== [2020-07-20 11:31:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:21,434 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-07-20 11:31:21,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:21,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456848955] [2020-07-20 11:31:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:21,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:31:21,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:21,535 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:31:21,535 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:21,537 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:21,538 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:21,538 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 11:31:21,565 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:21,566 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 [2020-07-20 11:31:21,566 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:21,574 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:21,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:21,577 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:21,582 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:21,583 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. [2020-07-20 11:31:21,584 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-20 11:31:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:21,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:21,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456848955] [2020-07-20 11:31:21,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:21,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:21,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594383852] [2020-07-20 11:31:21,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:21,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:21,592 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 5 states. [2020-07-20 11:31:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:21,696 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-07-20 11:31:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:21,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 11:31:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:21,698 INFO L225 Difference]: With dead ends: 126 [2020-07-20 11:31:21,698 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 11:31:21,698 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 [2020-07-20 11:31:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 11:31:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-20 11:31:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 11:31:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-07-20 11:31:21,706 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-07-20 11:31:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:21,706 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-07-20 11:31:21,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-07-20 11:31:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:31:21,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:21,707 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] [2020-07-20 11:31:21,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:21,922 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]=== [2020-07-20 11:31:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1214805939, now seen corresponding path program 1 times [2020-07-20 11:31:21,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:21,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094714341] [2020-07-20 11:31:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:22,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:31:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:22,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:22,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094714341] [2020-07-20 11:31:22,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:22,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:22,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965275219] [2020-07-20 11:31:22,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:22,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:22,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:22,028 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 5 states. [2020-07-20 11:31:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:22,104 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-07-20 11:31:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:22,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 11:31:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:22,115 INFO L225 Difference]: With dead ends: 136 [2020-07-20 11:31:22,116 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 11:31:22,116 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 [2020-07-20 11:31:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 11:31:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-20 11:31:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 11:31:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-20 11:31:22,123 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-07-20 11:31:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:22,123 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-20 11:31:22,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-20 11:31:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:31:22,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:22,125 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] [2020-07-20 11:31:22,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:22,338 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]=== [2020-07-20 11:31:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122782, now seen corresponding path program 1 times [2020-07-20 11:31:22,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:22,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627924389] [2020-07-20 11:31:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:31:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:22,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:22,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627924389] [2020-07-20 11:31:22,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:22,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:31:22,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869475055] [2020-07-20 11:31:22,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:31:22,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:31:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:22,432 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 3 states. [2020-07-20 11:31:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:22,447 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-07-20 11:31:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:22,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:31:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:22,449 INFO L225 Difference]: With dead ends: 102 [2020-07-20 11:31:22,449 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 11:31:22,449 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 [2020-07-20 11:31:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 11:31:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-20 11:31:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 11:31:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-07-20 11:31:22,456 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 24 [2020-07-20 11:31:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:22,456 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-07-20 11:31:22,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:31:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-07-20 11:31:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:31:22,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:22,457 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] [2020-07-20 11:31:22,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:22,671 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]=== [2020-07-20 11:31:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -481740404, now seen corresponding path program 1 times [2020-07-20 11:31:22,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:22,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069630140] [2020-07-20 11:31:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:31:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:22,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:22,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069630140] [2020-07-20 11:31:22,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:22,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:31:22,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209699936] [2020-07-20 11:31:22,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:31:22,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:22,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:31:22,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:22,768 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 3 states. [2020-07-20 11:31:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:22,788 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-07-20 11:31:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:22,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:31:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:22,790 INFO L225 Difference]: With dead ends: 78 [2020-07-20 11:31:22,790 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 11:31:22,791 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 [2020-07-20 11:31:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 11:31:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-20 11:31:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 11:31:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-07-20 11:31:22,800 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 25 [2020-07-20 11:31:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:22,803 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-07-20 11:31:22,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:31:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-07-20 11:31:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:31:22,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:22,805 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] [2020-07-20 11:31:23,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:23,006 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]=== [2020-07-20 11:31:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash -611625627, now seen corresponding path program 1 times [2020-07-20 11:31:23,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:23,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917807317] [2020-07-20 11:31:23,008 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 [2020-07-20 11:31:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:31:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:23,120 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:31:23,120 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,126 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,129 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:31:23,129 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,134 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,134 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,135 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 11:31:23,144 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,145 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:23,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:23,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917807317] [2020-07-20 11:31:23,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:23,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:23,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891076221] [2020-07-20 11:31:23,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:23,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:23,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:23,155 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 4 states. [2020-07-20 11:31:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:23,248 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-07-20 11:31:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:23,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-20 11:31:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:23,249 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:31:23,249 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 11:31:23,250 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 [2020-07-20 11:31:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 11:31:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-07-20 11:31:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 11:31:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-07-20 11:31:23,255 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 27 [2020-07-20 11:31:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:23,255 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-07-20 11:31:23,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-07-20 11:31:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:31:23,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:23,257 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] [2020-07-20 11:31:23,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:23,470 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]=== [2020-07-20 11:31:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -609778585, now seen corresponding path program 1 times [2020-07-20 11:31:23,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:23,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695646183] [2020-07-20 11:31:23,472 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 [2020-07-20 11:31:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 11:31:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:23,592 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:31:23,592 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,595 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,595 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 11:31:23,635 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,635 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 [2020-07-20 11:31:23,637 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,666 INFO L624 ElimStorePlain]: treesize reduction 14, result has 77.4 percent of original size [2020-07-20 11:31:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:23,673 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,687 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,690 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. [2020-07-20 11:31:23,690 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:50, output treesize:15 [2020-07-20 11:31:23,742 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,743 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 [2020-07-20 11:31:23,743 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,771 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,774 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_40|], 8=[|v_#memory_$Pointer$.offset_39|]} [2020-07-20 11:31:23,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:23,781 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,794 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:23,809 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 [2020-07-20 11:31:23,810 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:23,823 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:23,826 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. [2020-07-20 11:31:23,827 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:194, output treesize:42 [2020-07-20 11:31:23,852 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,856 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,937 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,941 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:31:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:23,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:23,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695646183] [2020-07-20 11:31:23,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:23,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:31:23,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568739573] [2020-07-20 11:31:23,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:31:23,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:31:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:31:23,965 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 8 states. [2020-07-20 11:31:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:24,389 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-07-20 11:31:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:31:24,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 11:31:24,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:24,391 INFO L225 Difference]: With dead ends: 153 [2020-07-20 11:31:24,391 INFO L226 Difference]: Without dead ends: 151 [2020-07-20 11:31:24,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:31:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-20 11:31:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 74. [2020-07-20 11:31:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 11:31:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-07-20 11:31:24,404 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 27 [2020-07-20 11:31:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:24,404 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-07-20 11:31:24,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:31:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-07-20 11:31:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:31:24,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:24,406 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] [2020-07-20 11:31:24,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:24,618 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]=== [2020-07-20 11:31:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2038545261, now seen corresponding path program 1 times [2020-07-20 11:31:24,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:24,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154997007] [2020-07-20 11:31:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 11:31:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:31:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:24,722 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:31:24,722 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:24,729 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:24,735 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 11:31:24,736 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:24,746 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:24,747 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:24,747 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-07-20 11:31:24,785 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:31:24,785 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:24,792 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:24,796 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:31:24,797 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:24,804 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:24,805 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:24,805 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-20 11:31:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:24,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:24,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154997007] [2020-07-20 11:31:24,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:24,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:31:24,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934066325] [2020-07-20 11:31:24,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:31:24,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:24,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:31:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:31:24,824 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 6 states. [2020-07-20 11:31:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:25,087 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2020-07-20 11:31:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:31:25,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 11:31:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:25,089 INFO L225 Difference]: With dead ends: 200 [2020-07-20 11:31:25,089 INFO L226 Difference]: Without dead ends: 159 [2020-07-20 11:31:25,090 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 [2020-07-20 11:31:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-20 11:31:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 96. [2020-07-20 11:31:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 11:31:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-07-20 11:31:25,103 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 28 [2020-07-20 11:31:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:25,106 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-07-20 11:31:25,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:31:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-07-20 11:31:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:31:25,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:25,112 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] [2020-07-20 11:31:25,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:25,313 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]=== [2020-07-20 11:31:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-20 11:31:25,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:25,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615478392] [2020-07-20 11:31:25,315 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 [2020-07-20 11:31:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 11:31:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:25,415 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:31:25,416 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,420 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,420 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,420 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 11:31:25,453 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,454 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 [2020-07-20 11:31:25,454 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,487 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:25,509 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 11:31:25,509 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 [2020-07-20 11:31:25,511 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,529 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:25,539 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 [2020-07-20 11:31:25,539 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,558 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,559 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. [2020-07-20 11:31:25,560 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 11:31:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 11:31:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:25,694 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-20 11:31:25,694 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 [2020-07-20 11:31:25,696 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 11:31:25,697 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 11:31:25,698 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:25,725 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-20 11:31:25,738 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,738 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 [2020-07-20 11:31:25,740 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,746 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:25,747 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:25,747 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-20 11:31:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:25,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:25,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615478392] [2020-07-20 11:31:25,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:25,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 11:31:25,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129079507] [2020-07-20 11:31:25,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:31:25,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:31:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:31:25,771 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-07-20 11:31:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:26,445 INFO L93 Difference]: Finished difference Result 238 states and 266 transitions. [2020-07-20 11:31:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:31:26,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 11:31:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:26,448 INFO L225 Difference]: With dead ends: 238 [2020-07-20 11:31:26,448 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 11:31:26,449 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 [2020-07-20 11:31:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 11:31:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 108. [2020-07-20 11:31:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 11:31:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-07-20 11:31:26,459 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 28 [2020-07-20 11:31:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:26,459 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-07-20 11:31:26,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:31:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-07-20 11:31:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:31:26,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:26,461 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] [2020-07-20 11:31:26,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:26,671 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]=== [2020-07-20 11:31:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1176203735, now seen corresponding path program 1 times [2020-07-20 11:31:26,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:26,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437072194] [2020-07-20 11:31:26,673 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 [2020-07-20 11:31:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:31:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:31:26,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:26,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437072194] [2020-07-20 11:31:26,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:26,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:31:26,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160851446] [2020-07-20 11:31:26,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:31:26,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:31:26,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:26,784 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 3 states. [2020-07-20 11:31:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:26,827 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-07-20 11:31:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:26,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 11:31:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:26,829 INFO L225 Difference]: With dead ends: 109 [2020-07-20 11:31:26,829 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 11:31:26,830 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 [2020-07-20 11:31:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 11:31:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-07-20 11:31:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 11:31:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-07-20 11:31:26,840 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 30 [2020-07-20 11:31:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:26,840 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-07-20 11:31:26,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:31:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-07-20 11:31:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:31:26,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:26,842 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] [2020-07-20 11:31:27,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:27,057 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]=== [2020-07-20 11:31:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-20 11:31:27,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:27,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558438936] [2020-07-20 11:31:27,058 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 [2020-07-20 11:31:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:27,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:27,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:27,198 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:31:27,198 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:27,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:27,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:27 BoogieIcfgContainer [2020-07-20 11:31:27,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:27,452 INFO L168 Benchmark]: Toolchain (without parser) took 9927.41 ms. Allocated memory was 138.4 MB in the beginning and 310.4 MB in the end (delta: 172.0 MB). Free memory was 101.0 MB in the beginning and 210.3 MB in the end (delta: -109.3 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:27,452 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:27,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.27 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 168.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:27,453 INFO L168 Benchmark]: Boogie Preprocessor took 79.99 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 165.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:27,454 INFO L168 Benchmark]: RCFGBuilder took 744.55 ms. Allocated memory is still 201.3 MB. Free memory was 165.0 MB in the beginning and 109.5 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:27,454 INFO L168 Benchmark]: TraceAbstraction took 8455.27 ms. Allocated memory was 201.3 MB in the beginning and 310.4 MB in the end (delta: 109.1 MB). Free memory was 108.8 MB in the beginning and 210.3 MB in the end (delta: -101.6 MB). Peak memory consumption was 7.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:27,457 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 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 642.27 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 168.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.99 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 165.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 744.55 ms. Allocated memory is still 201.3 MB. Free memory was 165.0 MB in the beginning and 109.5 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8455.27 ms. Allocated memory was 201.3 MB in the beginning and 310.4 MB in the end (delta: 109.1 MB). Free memory was 108.8 MB in the beginning and 210.3 MB in the end (delta: -101.6 MB). Peak memory consumption was 7.5 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))={-1:0}, malloc(sizeof(SLL))={21239:0}] [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))={-1:0}, malloc(sizeof(SLL))={21239:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={21239:0}, list={21239:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={21239:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={21239:0}, list={21239:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={21239:0}] [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))={-1:0}, malloc(sizeof(SLL))={21239:0}] [L1023] COND TRUE len == 0 [L1024] len = 1 VAL [end={21239:0}, inner={-1:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={21239:0}] [L1027] COND FALSE !(!(((void*)0) != inner)) VAL [end={21239:0}, inner={-1:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={21239:0}] [L1028] EXPR inner->inner VAL [end={21239:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={21239:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={21239:0}] [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))={-1:0}, malloc(sizeof(SLL))={21239:0}] [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))={-1:0}, malloc(sizeof(SLL))={21239:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.3s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.2s, 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, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s 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...