/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:30:38,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:30:38,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:30:38,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:30:38,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:30:38,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:30:38,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:30:38,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:30:38,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:30:38,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:30:38,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:30:38,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:30:38,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:30:38,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:30:38,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:30:38,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:30:38,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:30:38,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:30:38,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:30:38,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:30:38,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:30:38,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:30:38,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:30:38,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:30:38,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:30:38,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:30:38,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:30:38,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:30:38,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:30:38,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:30:38,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:30:38,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:30:38,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:30:38,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:30:38,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:30:38,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:30:38,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:30:38,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:30:38,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:30:38,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:30:38,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:30:38,255 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 [2020-11-06 22:30:38,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:30:38,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:30:38,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:30:38,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:30:38,315 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:30:38,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:30:38,315 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:30:38,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:30:38,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:30:38,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:30:38,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:30:38,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:30:38,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:30:38,317 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:30:38,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:30:38,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:30:38,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:30:38,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:30:38,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:30:38,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:30:38,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:30:38,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:30:38,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:30:38,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:30:38,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:30:38,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:30:38,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:30:38,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:30:38,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:30:38,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:30:38,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:30:38,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:30:38,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:30:38,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:30:38,734 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:30:38,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-11-06 22:30:38,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26bf357dd/5aedeb0029924b20b0bc5718a2fb0cdf/FLAG3dfd22548 [2020-11-06 22:30:39,548 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:30:39,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-11-06 22:30:39,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26bf357dd/5aedeb0029924b20b0bc5718a2fb0cdf/FLAG3dfd22548 [2020-11-06 22:30:39,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26bf357dd/5aedeb0029924b20b0bc5718a2fb0cdf [2020-11-06 22:30:39,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:30:39,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:30:39,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:30:39,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:30:39,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:30:39,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:39" (1/1) ... [2020-11-06 22:30:39,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ffeff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:39, skipping insertion in model container [2020-11-06 22:30:39,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:39" (1/1) ... [2020-11-06 22:30:39,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:30:39,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:30:40,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:30:40,184 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:30:40,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:30:40,308 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:30:40,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40 WrapperNode [2020-11-06 22:30:40,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:30:40,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:30:40,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:30:40,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:30:40,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (1/1) ... [2020-11-06 22:30:40,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:30:40,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:30:40,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:30:40,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:30:40,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (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 [2020-11-06 22:30:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:30:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:30:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:30:40,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:30:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-06 22:30:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-06 22:30:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-06 22:30:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-06 22:30:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-06 22:30:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-06 22:30:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-06 22:30:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-06 22:30:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-06 22:30:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-06 22:30:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-06 22:30:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-06 22:30:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-06 22:30:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-06 22:30:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-06 22:30:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-06 22:30:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-06 22:30:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-06 22:30:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-06 22:30:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-06 22:30:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-06 22:30:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-06 22:30:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-06 22:30:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-06 22:30:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-06 22:30:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-06 22:30:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-06 22:30:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-06 22:30:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:30:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-06 22:30:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-06 22:30:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-06 22:30:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-06 22:30:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-06 22:30:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-06 22:30:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-06 22:30:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-06 22:30:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-06 22:30:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-06 22:30:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-06 22:30:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-06 22:30:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-06 22:30:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-06 22:30:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-06 22:30:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-06 22:30:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-06 22:30:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-06 22:30:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-06 22:30:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-06 22:30:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-06 22:30:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-06 22:30:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-06 22:30:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-06 22:30:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-06 22:30:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-06 22:30:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-06 22:30:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-06 22:30:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-06 22:30:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-06 22:30:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-06 22:30:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-06 22:30:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-06 22:30:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-06 22:30:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-06 22:30:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-06 22:30:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-06 22:30:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-06 22:30:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:30:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:30:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:30:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:30:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:30:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:30:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:30:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:30:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:30:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:30:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:30:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:30:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:30:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:30:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:30:41,143 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:30:41,143 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-06 22:30:41,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:41 BoogieIcfgContainer [2020-11-06 22:30:41,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:30:41,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:30:41,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:30:41,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:30:41,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:39" (1/3) ... [2020-11-06 22:30:41,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b885540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:41, skipping insertion in model container [2020-11-06 22:30:41,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:40" (2/3) ... [2020-11-06 22:30:41,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b885540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:41, skipping insertion in model container [2020-11-06 22:30:41,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:41" (3/3) ... [2020-11-06 22:30:41,154 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-11-06 22:30:41,169 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:30:41,173 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:30:41,186 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:30:41,213 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:30:41,214 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:30:41,214 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:30:41,214 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:30:41,214 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:30:41,214 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:30:41,214 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:30:41,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:30:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-11-06 22:30:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:30:41,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:41,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:41,240 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 444257067, now seen corresponding path program 1 times [2020-11-06 22:30:41,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:41,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216691058] [2020-11-06 22:30:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:41,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216691058] [2020-11-06 22:30:41,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:41,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:30:41,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776827435] [2020-11-06 22:30:41,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:30:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:30:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:30:41,525 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-11-06 22:30:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:41,698 INFO L93 Difference]: Finished difference Result 99 states and 172 transitions. [2020-11-06 22:30:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:30:41,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:30:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:41,709 INFO L225 Difference]: With dead ends: 99 [2020-11-06 22:30:41,709 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:30:41,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:30:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:30:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:30:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:30:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-11-06 22:30:41,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 12 [2020-11-06 22:30:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-11-06 22:30:41,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:30:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-11-06 22:30:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:30:41,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:41,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:41,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:30:41,759 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:41,760 INFO L82 PathProgramCache]: Analyzing trace with hash 571755276, now seen corresponding path program 1 times [2020-11-06 22:30:41,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:41,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303164642] [2020-11-06 22:30:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:41,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:41,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303164642] [2020-11-06 22:30:41,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:41,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364918277] [2020-11-06 22:30:41,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:41,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:41,905 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 states. [2020-11-06 22:30:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:42,147 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-11-06 22:30:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:42,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-06 22:30:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:42,149 INFO L225 Difference]: With dead ends: 50 [2020-11-06 22:30:42,149 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:30:42,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:30:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-11-06 22:30:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:30:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-11-06 22:30:42,160 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 13 [2020-11-06 22:30:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:42,161 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-11-06 22:30:42,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-11-06 22:30:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:30:42,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:42,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:42,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:30:42,162 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash 541512391, now seen corresponding path program 1 times [2020-11-06 22:30:42,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:42,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320141141] [2020-11-06 22:30:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320141141] [2020-11-06 22:30:42,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:42,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:42,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397488858] [2020-11-06 22:30:42,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:42,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:42,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:42,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:42,299 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-11-06 22:30:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:42,491 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-11-06 22:30:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:42,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-06 22:30:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:42,493 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:30:42,493 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:30:42,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:30:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-06 22:30:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:30:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-11-06 22:30:42,502 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-11-06 22:30:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:42,502 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-11-06 22:30:42,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-11-06 22:30:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:30:42,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:42,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:42,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:30:42,504 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -38373523, now seen corresponding path program 1 times [2020-11-06 22:30:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:42,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029010239] [2020-11-06 22:30:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:42,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:42,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029010239] [2020-11-06 22:30:42,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:42,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:30:42,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133109390] [2020-11-06 22:30:42,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:30:42,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:30:42,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:42,634 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-11-06 22:30:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:42,868 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-11-06 22:30:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:30:42,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:30:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:42,870 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:30:42,870 INFO L226 Difference]: Without dead ends: 60 [2020-11-06 22:30:42,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:30:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-06 22:30:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-11-06 22:30:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-06 22:30:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-11-06 22:30:42,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 16 [2020-11-06 22:30:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:42,880 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-11-06 22:30:42,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:30:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-11-06 22:30:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:30:42,882 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:42,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:42,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:30:42,882 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash -575459649, now seen corresponding path program 1 times [2020-11-06 22:30:42,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:42,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247534281] [2020-11-06 22:30:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:42,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:42,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247534281] [2020-11-06 22:30:42,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:42,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:42,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085672050] [2020-11-06 22:30:42,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:42,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:42,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:42,981 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 5 states. [2020-11-06 22:30:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:43,185 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-11-06 22:30:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:43,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-06 22:30:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:43,187 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:30:43,187 INFO L226 Difference]: Without dead ends: 45 [2020-11-06 22:30:43,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-06 22:30:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-06 22:30:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-06 22:30:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-11-06 22:30:43,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2020-11-06 22:30:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:43,195 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-11-06 22:30:43,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-11-06 22:30:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:30:43,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:43,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:43,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:30:43,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1021377268, now seen corresponding path program 1 times [2020-11-06 22:30:43,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:43,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027262220] [2020-11-06 22:30:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:43,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027262220] [2020-11-06 22:30:43,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:43,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:43,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397022301] [2020-11-06 22:30:43,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:43,316 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-11-06 22:30:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:43,504 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-11-06 22:30:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:43,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-06 22:30:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:43,506 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:30:43,506 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:30:43,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:30:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-06 22:30:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:30:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-11-06 22:30:43,513 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2020-11-06 22:30:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:43,513 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-11-06 22:30:43,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-11-06 22:30:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:30:43,514 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:43,515 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] [2020-11-06 22:30:43,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:30:43,515 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash -605625927, now seen corresponding path program 1 times [2020-11-06 22:30:43,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:43,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608996551] [2020-11-06 22:30:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:43,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:43,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608996551] [2020-11-06 22:30:43,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:43,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:30:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471500317] [2020-11-06 22:30:43,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:30:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:43,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:30:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:43,649 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-11-06 22:30:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:43,877 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-11-06 22:30:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:30:43,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-06 22:30:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:43,885 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:30:43,885 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:30:43,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:30:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:30:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-11-06 22:30:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-06 22:30:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-11-06 22:30:43,892 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 20 [2020-11-06 22:30:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:43,893 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-11-06 22:30:43,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:30:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-11-06 22:30:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:30:43,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:43,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:30:43,894 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash 727972317, now seen corresponding path program 1 times [2020-11-06 22:30:43,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:43,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335066650] [2020-11-06 22:30:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:44,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335066650] [2020-11-06 22:30:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237727450] [2020-11-06 22:30:44,048 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:30:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:30:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:30:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,319 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2020-11-06 22:30:44,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:44,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:44,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,347 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2020-11-06 22:30:44,348 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:44,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:44,381 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:44,382 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2020-11-06 22:30:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:44,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 24 treesize of output 10 [2020-11-06 22:30:44,456 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:44,466 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:44,472 INFO L348 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-11-06 22:30:44,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 10 [2020-11-06 22:30:44,474 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:44,479 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:44,480 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:44,480 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-11-06 22:30:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:44,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:30:44,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-06 22:30:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334175600] [2020-11-06 22:30:44,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:30:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:30:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:30:44,503 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-11-06 22:30:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:44,991 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-06 22:30:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:30:44,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-11-06 22:30:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:44,992 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:30:44,993 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:30:44,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:30:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:30:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:30:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:30:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-11-06 22:30:45,004 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 23 [2020-11-06 22:30:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:45,004 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-11-06 22:30:45,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:30:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-11-06 22:30:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:30:45,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:45,006 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:45,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-06 22:30:45,219 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1402037848, now seen corresponding path program 1 times [2020-11-06 22:30:45,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:45,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840177685] [2020-11-06 22:30:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:45,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840177685] [2020-11-06 22:30:45,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442321839] [2020-11-06 22:30:45,397 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:30:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-06 22:30:45,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:30:45,592 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-06 22:30:45,592 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-06 22:30:45,593 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:45,605 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:45,611 INFO L382 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 [2020-11-06 22:30:45,611 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:45,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:45,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:45,625 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:26 [2020-11-06 22:30:45,865 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:45,866 INFO L382 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 [2020-11-06 22:30:45,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:30:45,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:45,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:45,935 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-11-06 22:30:45,935 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:45,958 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:45,965 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:45,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:45,992 INFO L547 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:46,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:46,032 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:46,033 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2020-11-06 22:30:46,036 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:46,074 INFO L625 ElimStorePlain]: treesize reduction 20, result has 63.6 percent of original size [2020-11-06 22:30:46,078 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:46,078 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:105, output treesize:14 [2020-11-06 22:30:46,105 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-11-06 22:30:46,106 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:46,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:46,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:46,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-11-06 22:30:46,316 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 10 [2020-11-06 22:30:46,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:46,324 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:46,326 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:46,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:3 [2020-11-06 22:30:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:46,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:30:46,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-11-06 22:30:46,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302412371] [2020-11-06 22:30:46,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:30:46,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:30:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:30:46,343 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 12 states. [2020-11-06 22:30:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:47,091 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-11-06 22:30:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:30:47,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-11-06 22:30:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:47,093 INFO L225 Difference]: With dead ends: 76 [2020-11-06 22:30:47,093 INFO L226 Difference]: Without dead ends: 72 [2020-11-06 22:30:47,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:30:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-06 22:30:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-11-06 22:30:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-06 22:30:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-11-06 22:30:47,115 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 27 [2020-11-06 22:30:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:47,115 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-11-06 22:30:47,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:30:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-11-06 22:30:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:30:47,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:47,119 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:47,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:30:47,335 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:47,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1203985706, now seen corresponding path program 1 times [2020-11-06 22:30:47,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:47,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297326489] [2020-11-06 22:30:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:47,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297326489] [2020-11-06 22:30:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304584811] [2020-11-06 22:30:47,618 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:30:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-06 22:30:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:30:47,785 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-06 22:30:47,785 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-06 22:30:47,786 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:47,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:47,805 INFO L382 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 [2020-11-06 22:30:47,805 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:47,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:47,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:47,822 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-11-06 22:30:47,932 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:47,933 INFO L382 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 [2020-11-06 22:30:47,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,053 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-11-06 22:30:48,055 INFO L625 ElimStorePlain]: treesize reduction 14, result has 89.1 percent of original size [2020-11-06 22:30:48,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:48,068 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,109 INFO L547 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:48,151 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,155 INFO L547 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:48,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:48,252 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,253 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 55 [2020-11-06 22:30:48,254 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,347 INFO L625 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2020-11-06 22:30:48,358 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,359 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:117, output treesize:27 [2020-11-06 22:30:48,528 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,530 INFO L382 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 [2020-11-06 22:30:48,531 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,621 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,623 INFO L443 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_31|, |v_#memory_$Pointer$.offset_30|, |v_#memory_int_45|, |v_#memory_int_46|, |v_#memory_int_47|], 4=[|v_#memory_int_49|]} [2020-11-06 22:30:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:48,627 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,682 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:48,687 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,728 INFO L547 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:48,762 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,765 INFO L547 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:48,795 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,799 INFO L547 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:48,833 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:48,848 INFO L348 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-11-06 22:30:48,849 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2020-11-06 22:30:48,850 INFO L547 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:48,878 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:48,887 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 6 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:48,887 INFO L244 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:319, output treesize:41 [2020-11-06 22:30:49,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2020-11-06 22:30:49,093 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:49,101 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:49,103 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:49,103 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:3 [2020-11-06 22:30:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:30:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-11-06 22:30:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144817727] [2020-11-06 22:30:49,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:30:49,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:30:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:30:49,116 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 12 states. [2020-11-06 22:30:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:57,721 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-11-06 22:30:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:30:57,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-11-06 22:30:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:57,723 INFO L225 Difference]: With dead ends: 90 [2020-11-06 22:30:57,724 INFO L226 Difference]: Without dead ends: 86 [2020-11-06 22:30:57,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:30:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-06 22:30:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 40. [2020-11-06 22:30:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:30:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-06 22:30:57,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-11-06 22:30:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:57,733 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-06 22:30:57,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:30:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-06 22:30:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:30:57,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:57,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:30:57,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash -695799998, now seen corresponding path program 1 times [2020-11-06 22:30:57,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:57,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075031871] [2020-11-06 22:30:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075031871] [2020-11-06 22:30:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847439507] [2020-11-06 22:30:58,287 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:30:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:58,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-06 22:30:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:30:58,477 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-06 22:30:58,477 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-06 22:30:58,478 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:58,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:58,490 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:30:58,491 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:23 [2020-11-06 22:30:58,681 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:58,682 INFO L382 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 [2020-11-06 22:30:58,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:30:58,685 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:58,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:58,752 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:30:58,764 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:58,765 INFO L382 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 63 treesize of output 41 [2020-11-06 22:30:58,765 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:58,821 INFO L625 ElimStorePlain]: treesize reduction 16, result has 88.4 percent of original size [2020-11-06 22:30:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:30:58,841 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:58,841 INFO L382 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 63 treesize of output 41 [2020-11-06 22:30:58,842 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:58,900 INFO L625 ElimStorePlain]: treesize reduction 16, result has 77.8 percent of original size [2020-11-06 22:30:58,902 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:58,902 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:194, output treesize:46 [2020-11-06 22:30:58,966 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_int_50|], 4=[|v_#memory_$Pointer$.base_34|], 6=[|v_#memory_$Pointer$.offset_32|]} [2020-11-06 22:30:58,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-11-06 22:30:58,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,007 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,007 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 72 [2020-11-06 22:30:59,008 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,034 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2020-11-06 22:30:59,035 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,060 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,060 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:125, output treesize:63 [2020-11-06 22:30:59,192 INFO L443 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.base|], 1=[|#memory_$Pointer$.offset|]} [2020-11-06 22:30:59,198 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 35 [2020-11-06 22:30:59,205 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,221 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,226 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-06 22:30:59,227 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,236 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,237 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,237 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:11 [2020-11-06 22:30:59,287 INFO L382 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 [2020-11-06 22:30:59,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,290 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:30:59,291 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:30:59,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-11-06 22:30:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:59,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:30:59,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-11-06 22:30:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240682156] [2020-11-06 22:30:59,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:30:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:30:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:30:59,337 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 19 states. [2020-11-06 22:31:00,460 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-11-06 22:31:00,600 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-06 22:31:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:31:00,933 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-11-06 22:31:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:31:00,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-11-06 22:31:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:31:00,935 INFO L225 Difference]: With dead ends: 97 [2020-11-06 22:31:00,936 INFO L226 Difference]: Without dead ends: 84 [2020-11-06 22:31:00,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:31:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-06 22:31:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-11-06 22:31:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-06 22:31:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-06 22:31:00,946 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 34 [2020-11-06 22:31:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:31:00,946 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-06 22:31:00,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:31:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-06 22:31:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:31:00,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:00,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:01,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:31:01,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash -633760384, now seen corresponding path program 1 times [2020-11-06 22:31:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:01,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347966187] [2020-11-06 22:31:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:01,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:31:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:01,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347966187] [2020-11-06 22:31:01,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80529961] [2020-11-06 22:31:01,686 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:31:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 53 conjunts are in the unsatisfiable core [2020-11-06 22:31:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:31:01,893 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-06 22:31:01,894 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-06 22:31:01,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:01,910 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:01,911 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:31:01,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:23 [2020-11-06 22:31:01,956 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:01,957 INFO L382 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 [2020-11-06 22:31:01,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:02,086 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-06 22:31:02,087 INFO L625 ElimStorePlain]: treesize reduction 14, result has 93.5 percent of original size [2020-11-06 22:31:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:02,101 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:31:02,120 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:02,120 INFO L382 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 63 treesize of output 41 [2020-11-06 22:31:02,121 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:02,203 INFO L625 ElimStorePlain]: treesize reduction 16, result has 89.4 percent of original size [2020-11-06 22:31:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:02,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:02,226 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:02,227 INFO L382 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 63 treesize of output 41 [2020-11-06 22:31:02,228 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:02,310 INFO L625 ElimStorePlain]: treesize reduction 16, result has 81.2 percent of original size [2020-11-06 22:31:02,312 INFO L547 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. [2020-11-06 22:31:02,312 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:203, output treesize:66 [2020-11-06 22:31:02,468 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:02,469 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-11-06 22:31:02,470 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:02,707 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-11-06 22:31:02,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:02,710 INFO L443 ElimStorePlain]: Different costs {6=[|v_#memory_$Pointer$.offset_35|, |v_#memory_$Pointer$.base_37|], 11=[|v_#memory_$Pointer$.offset_33|, |v_#memory_$Pointer$.base_35|]} [2020-11-06 22:31:02,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2020-11-06 22:31:02,747 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:03,001 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-06 22:31:03,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:03,013 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:03,013 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 406 treesize of output 274 [2020-11-06 22:31:03,015 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:03,345 WARN L194 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-11-06 22:31:03,346 INFO L625 ElimStorePlain]: treesize reduction 16, result has 96.1 percent of original size [2020-11-06 22:31:03,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:03,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:03,366 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:31:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:03,439 INFO L348 Elim1Store]: treesize reduction 5, result has 90.7 percent of original size [2020-11-06 22:31:03,440 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 97 [2020-11-06 22:31:03,447 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:03,591 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-11-06 22:31:03,592 INFO L625 ElimStorePlain]: treesize reduction 41, result has 86.4 percent of original size [2020-11-06 22:31:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:03,674 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:03,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 174 treesize of output 144 [2020-11-06 22:31:03,677 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:03,845 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-11-06 22:31:03,846 INFO L625 ElimStorePlain]: treesize reduction 134, result has 42.7 percent of original size [2020-11-06 22:31:03,847 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:31:03,847 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:457, output treesize:97 [2020-11-06 22:31:04,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:04,104 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 19 [2020-11-06 22:31:04,107 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:04,123 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:04,124 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:31:04,124 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:135, output treesize:72 [2020-11-06 22:31:04,214 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:04,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 69 treesize of output 82 [2020-11-06 22:31:04,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:31:04,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:31:04,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:31:04,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:31:04,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:31:04,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:31:04,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:31:04,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:31:04,242 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:04,247 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:04,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:31:04,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:4 [2020-11-06 22:31:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:04,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:31:04,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2020-11-06 22:31:04,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158763309] [2020-11-06 22:31:04,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:31:04,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:31:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:31:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:31:04,266 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 18 states. [2020-11-06 22:31:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:31:08,777 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2020-11-06 22:31:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:31:08,778 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-11-06 22:31:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:31:08,779 INFO L225 Difference]: With dead ends: 121 [2020-11-06 22:31:08,779 INFO L226 Difference]: Without dead ends: 117 [2020-11-06 22:31:08,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:31:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-06 22:31:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2020-11-06 22:31:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-06 22:31:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-11-06 22:31:08,798 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 34 [2020-11-06 22:31:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:31:08,798 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-11-06 22:31:08,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:31:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-11-06 22:31:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:31:08,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:08,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:09,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-06 22:31:09,002 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1293216844, now seen corresponding path program 2 times [2020-11-06 22:31:09,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:09,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190019533] [2020-11-06 22:31:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:09,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:31:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:09,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190019533] [2020-11-06 22:31:09,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357563016] [2020-11-06 22:31:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:31:09,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:31:09,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:31:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-06 22:31:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:31:09,644 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-06 22:31:09,644 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-06 22:31:09,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:09,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:09,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:31:09,676 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:23 [2020-11-06 22:31:09,711 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:09,711 INFO L382 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 [2020-11-06 22:31:09,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:31:09,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:09,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:09,795 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:31:09,808 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:09,808 INFO L382 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 63 treesize of output 41 [2020-11-06 22:31:09,809 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:09,877 INFO L625 ElimStorePlain]: treesize reduction 16, result has 88.7 percent of original size [2020-11-06 22:31:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:09,899 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:09,899 INFO L382 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 63 treesize of output 41 [2020-11-06 22:31:09,900 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:09,966 INFO L625 ElimStorePlain]: treesize reduction 16, result has 78.7 percent of original size [2020-11-06 22:31:09,967 INFO L547 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. [2020-11-06 22:31:09,967 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:197, output treesize:56 [2020-11-06 22:31:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:10,036 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2020-11-06 22:31:10,037 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:10,073 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:31:10,085 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2020-11-06 22:31:10,086 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:10,112 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:10,113 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:31:10,113 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:94, output treesize:56 [2020-11-06 22:31:10,386 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-11-06 22:31:10,387 INFO L382 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 83 treesize of output 53 [2020-11-06 22:31:10,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-06 22:31:10,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-06 22:31:10,391 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:31:10,425 INFO L625 ElimStorePlain]: treesize reduction 8, result has 84.3 percent of original size [2020-11-06 22:31:10,440 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:10,440 INFO L382 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 33 treesize of output 32 [2020-11-06 22:31:10,441 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:10,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:10,452 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:31:10,452 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:10 [2020-11-06 22:31:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:10,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:31:10,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2020-11-06 22:31:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576970299] [2020-11-06 22:31:10,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:31:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:31:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:31:10,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:31:10,489 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 17 states. [2020-11-06 22:31:12,963 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-11-06 22:31:15,227 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-11-06 22:31:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:31:15,495 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-11-06 22:31:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:31:15,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-11-06 22:31:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:31:15,499 INFO L225 Difference]: With dead ends: 100 [2020-11-06 22:31:15,499 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:31:15,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:31:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:31:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-06 22:31:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-06 22:31:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-11-06 22:31:15,525 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 37 [2020-11-06 22:31:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:31:15,525 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-11-06 22:31:15,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:31:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-11-06 22:31:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:31:15,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:15,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:15,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:31:15,744 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:15,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2057975726, now seen corresponding path program 1 times [2020-11-06 22:31:15,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:15,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257519437] [2020-11-06 22:31:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:31:15,790 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:31:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:31:15,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:31:15,877 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:31:15,877 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:31:15,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-06 22:31:15,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:31:15 BoogieIcfgContainer [2020-11-06 22:31:15,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:31:15,936 INFO L168 Benchmark]: Toolchain (without parser) took 36156.38 ms. Allocated memory was 154.1 MB in the beginning and 227.5 MB in the end (delta: 73.4 MB). Free memory was 128.2 MB in the beginning and 132.0 MB in the end (delta: -3.7 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:15,936 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:31:15,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 524.43 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 105.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:15,937 INFO L168 Benchmark]: Boogie Preprocessor took 71.48 ms. Allocated memory is still 154.1 MB. Free memory was 105.2 MB in the beginning and 102.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:15,937 INFO L168 Benchmark]: RCFGBuilder took 760.95 ms. Allocated memory is still 154.1 MB. Free memory was 102.4 MB in the beginning and 113.3 MB in the end (delta: -10.8 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:15,938 INFO L168 Benchmark]: TraceAbstraction took 34788.27 ms. Allocated memory was 154.1 MB in the beginning and 227.5 MB in the end (delta: 73.4 MB). Free memory was 112.7 MB in the beginning and 132.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:15,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 154.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 524.43 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 105.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.48 ms. Allocated memory is still 154.1 MB. Free memory was 105.2 MB in the beginning and 102.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 760.95 ms. Allocated memory is still 154.1 MB. Free memory was 102.4 MB in the beginning and 113.3 MB in the end (delta: -10.8 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34788.27 ms. Allocated memory was 154.1 MB in the beginning and 227.5 MB in the end (delta: 73.4 MB). Free memory was 112.7 MB in the beginning and 132.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) [L1000] null->prev = ((void*)0) [L1001] null->colour = BLACK [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null [L1005] list->prev = null [L1006] list->colour = BLACK [L1008] struct TSLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1011] COND TRUE __VERIFIER_nondet_int() [L1014] end->next = malloc(sizeof(struct TSLL)) [L1015] EXPR end->next [L1015] end->next->prev = end [L1016] EXPR end->next [L1016] end = end->next [L1017] end->next = null [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end->colour = RED [L1026] end->next = malloc(sizeof(struct TSLL)) [L1027] EXPR end->next [L1027] end->next->prev = end [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = null [L1030] end->colour = BLACK VAL [end={-4:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1032] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-2:0}] [L1032] COND FALSE !(!(BLACK == end->colour)) [L1033] EXPR end->next VAL [end={-4:0}, end->next={-2:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-2:0}] [L1033] COND FALSE !(!(null == end->next)) [L1034] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-2:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-2:0}] [L1042] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-2:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end [L1045] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next [L1052] end = end->next [L1043] COND TRUE null != end [L1045] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1045] COND TRUE RED == end->colour [L1047] EXPR end->next [L1047] end = end->next [L1048] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-2:0}] [L1049] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1049] COND TRUE !(BLACK != end->colour) [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-rb-sentinel-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34.6s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 22.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 661 SDslu, 1586 SDs, 0 SdLazy, 2221 SolverSat, 240 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 18.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 183 SyntacticMatches, 6 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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, 140 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 512 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 456 ConstructedInterpolants, 45 QuantifiedInterpolants, 320535 SizeOfPredicates, 87 NumberOfNonLiveVariables, 1066 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 9/46 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...