/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/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:29:12,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:29:12,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:29:12,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:29:12,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:29:12,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:29:12,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:29:12,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:29:12,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:29:12,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:29:12,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:29:12,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:29:12,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:29:12,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:29:12,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:29:12,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:29:12,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:29:12,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:29:12,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:29:12,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:29:12,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:29:12,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:29:12,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:29:12,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:29:12,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:29:12,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:29:12,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:29:12,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:29:12,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:29:12,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:29:12,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:29:12,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:29:12,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:29:12,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:29:12,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:29:12,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:29:12,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:29:12,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:29:12,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:29:12,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:29:12,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:29:12,174 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 [2020-10-23 18:29:12,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:29:12,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:29:12,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:29:12,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:29:12,241 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:29:12,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:29:12,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:29:12,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:29:12,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:29:12,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:29:12,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:29:12,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:29:12,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:29:12,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:29:12,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:29:12,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:29:12,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:29:12,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:29:12,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:29:12,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:29:12,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:29:12,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:29:12,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:29:12,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:29:12,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:29:12,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:29:12,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:29:12,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:29:12,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:29:12,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:29:12,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:29:12,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:29:12,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:29:12,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:29:12,687 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:29:12,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-23 18:29:12,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f964f5d7/a5c689f435304d7c815121cd14c01685/FLAG1de3578e0 [2020-10-23 18:29:13,541 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:29:13,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-23 18:29:13,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f964f5d7/a5c689f435304d7c815121cd14c01685/FLAG1de3578e0 [2020-10-23 18:29:13,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f964f5d7/a5c689f435304d7c815121cd14c01685 [2020-10-23 18:29:13,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:29:13,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:29:13,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:29:13,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:29:13,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:29:13,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:29:13" (1/1) ... [2020-10-23 18:29:13,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b28209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:13, skipping insertion in model container [2020-10-23 18:29:13,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:29:13" (1/1) ... [2020-10-23 18:29:13,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:29:13,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:29:14,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:29:14,199 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:29:14,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:29:14,335 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:29:14,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14 WrapperNode [2020-10-23 18:29:14,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:29:14,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:29:14,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:29:14,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:29:14,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (1/1) ... [2020-10-23 18:29:14,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:29:14,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:29:14,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:29:14,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:29:14,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (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 [2020-10-23 18:29:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:29:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:29:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:29:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 18:29:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 18:29:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 18:29:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-23 18:29:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-23 18:29:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-23 18:29:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:29:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:29:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:29:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:29:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:29:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:29:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:29:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:29:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 18:29:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 18:29:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:29:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:29:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:29:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:29:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:29:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:29:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:29:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:29:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:29:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:29:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:29:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:29:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:29:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:29:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:29:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:29:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:29:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:29:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:29:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:29:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:29:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:29:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:29:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:29:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:29:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:29:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:29:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:29:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:29:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:29:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:29:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:29:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:29:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:29:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:29:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:29:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:29:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:29:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:29:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:29:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:29:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:29:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:29:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:29:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:29:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:29:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:29:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:29:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:29:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:29:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:29:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:29:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:29:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:29:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:29:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:29:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:29:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:29:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:29:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:29:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:29:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:29:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:29:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:29:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:29:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:29:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:29:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:29:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:29:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:29:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:29:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:29:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:29:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:29:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:29:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:29:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-23 18:29:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:29:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:29:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:29:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:29:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:29:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:29:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:29:14,922 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 18:29:15,097 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:29:15,097 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 18:29:15,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:29:15 BoogieIcfgContainer [2020-10-23 18:29:15,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:29:15,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:29:15,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:29:15,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:29:15,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:29:13" (1/3) ... [2020-10-23 18:29:15,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a9f1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:29:15, skipping insertion in model container [2020-10-23 18:29:15,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:29:14" (2/3) ... [2020-10-23 18:29:15,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a9f1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:29:15, skipping insertion in model container [2020-10-23 18:29:15,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:29:15" (3/3) ... [2020-10-23 18:29:15,129 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-10-23 18:29:15,141 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:29:15,148 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:29:15,161 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:29:15,202 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:29:15,202 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:29:15,202 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:29:15,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:29:15,203 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:29:15,203 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:29:15,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:29:15,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:29:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-23 18:29:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:29:15,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:15,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:15,228 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1271350858, now seen corresponding path program 1 times [2020-10-23 18:29:15,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:15,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365773080] [2020-10-23 18:29:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:29:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 18:29:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:15,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365773080] [2020-10-23 18:29:15,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:29:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:29:15,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539649846] [2020-10-23 18:29:15,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:29:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:29:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:29:15,541 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-23 18:29:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:15,767 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2020-10-23 18:29:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:29:15,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:29:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:15,780 INFO L225 Difference]: With dead ends: 96 [2020-10-23 18:29:15,780 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 18:29:15,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:29:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 18:29:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-23 18:29:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:29:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-23 18:29:15,836 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-23 18:29:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:15,836 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-23 18:29:15,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:29:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-23 18:29:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:29:15,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:15,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:15,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:29:15,838 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash -272217543, now seen corresponding path program 1 times [2020-10-23 18:29:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:15,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088911965] [2020-10-23 18:29:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:29:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:15,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 18:29:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088911965] [2020-10-23 18:29:16,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:29:16,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:29:16,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410872281] [2020-10-23 18:29:16,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:29:16,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:16,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:29:16,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:29:16,008 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-10-23 18:29:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:16,318 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-23 18:29:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:29:16,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 18:29:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:16,320 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:29:16,320 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:29:16,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:29:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:29:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2020-10-23 18:29:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:29:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-23 18:29:16,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-10-23 18:29:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:16,334 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-23 18:29:16,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:29:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-23 18:29:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:29:16,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:16,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:16,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:29:16,335 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash 545430907, now seen corresponding path program 1 times [2020-10-23 18:29:16,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:16,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115263051] [2020-10-23 18:29:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:29:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 18:29:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:16,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115263051] [2020-10-23 18:29:16,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:29:16,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:29:16,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648973114] [2020-10-23 18:29:16,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:29:16,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:16,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:29:16,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:29:16,494 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-10-23 18:29:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:16,835 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-23 18:29:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:29:16,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-23 18:29:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:16,837 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:29:16,837 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:29:16,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:29:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:29:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-10-23 18:29:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:29:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-23 18:29:16,849 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 27 [2020-10-23 18:29:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:16,850 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-23 18:29:16,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:29:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-23 18:29:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:29:16,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:16,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:16,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:29:16,852 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash 814277137, now seen corresponding path program 1 times [2020-10-23 18:29:16,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:16,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138429414] [2020-10-23 18:29:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:16,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:29:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:29:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138429414] [2020-10-23 18:29:17,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:29:17,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 18:29:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206729595] [2020-10-23 18:29:17,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:29:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:29:17,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:29:17,047 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2020-10-23 18:29:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:17,451 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-23 18:29:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:29:17,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-23 18:29:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:17,455 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:29:17,455 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:29:17,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:29:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:29:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-23 18:29:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:29:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-23 18:29:17,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 30 [2020-10-23 18:29:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:17,467 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-23 18:29:17,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:29:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-23 18:29:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:29:17,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:17,469 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, 1, 1, 1] [2020-10-23 18:29:17,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:29:17,469 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 183624418, now seen corresponding path program 1 times [2020-10-23 18:29:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:17,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577055309] [2020-10-23 18:29:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:29:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:29:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577055309] [2020-10-23 18:29:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040864333] [2020-10-23 18:29:17,561 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 [2020-10-23 18:29:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:29:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:29:17,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:29:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:17,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:29:17,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-10-23 18:29:17,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93239483] [2020-10-23 18:29:17,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:29:17,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:17,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:29:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:29:17,775 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 8 states. [2020-10-23 18:29:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:18,141 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-23 18:29:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:29:18,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-23 18:29:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:18,143 INFO L225 Difference]: With dead ends: 100 [2020-10-23 18:29:18,143 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 18:29:18,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:29:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 18:29:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-10-23 18:29:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:29:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-23 18:29:18,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 30 [2020-10-23 18:29:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:18,158 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-23 18:29:18,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:29:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-23 18:29:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:29:18,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:18,159 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] [2020-10-23 18:29:18,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:29:18,373 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:18,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1001272868, now seen corresponding path program 1 times [2020-10-23 18:29:18,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:18,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913403982] [2020-10-23 18:29:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:18,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:18,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:29:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:18,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:29:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:18,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913403982] [2020-10-23 18:29:18,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023866269] [2020-10-23 18:29:18,538 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 [2020-10-23 18:29:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:29:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:29:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:18,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:29:18,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2020-10-23 18:29:18,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618077580] [2020-10-23 18:29:18,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:29:18,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:18,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:29:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:29:18,748 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 6 states. [2020-10-23 18:29:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:18,825 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-23 18:29:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:29:18,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-23 18:29:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:18,827 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:29:18,827 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:29:18,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:29:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:29:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-23 18:29:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 18:29:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-23 18:29:18,841 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-10-23 18:29:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:18,841 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-23 18:29:18,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:29:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-23 18:29:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:29:18,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:18,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:19,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:29:19,057 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1806048650, now seen corresponding path program 1 times [2020-10-23 18:29:19,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:19,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002526675] [2020-10-23 18:29:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:19,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:29:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:29:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:29:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002526675] [2020-10-23 18:29:19,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847382681] [2020-10-23 18:29:19,182 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 [2020-10-23 18:29:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:29:19,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:29:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:29:19,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:29:19,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2020-10-23 18:29:19,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216650041] [2020-10-23 18:29:19,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:29:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:29:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:29:19,381 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2020-10-23 18:29:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:19,722 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-23 18:29:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:29:19,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-23 18:29:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:19,723 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:29:19,724 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 18:29:19,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:29:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 18:29:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-23 18:29:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:29:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 18:29:19,738 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2020-10-23 18:29:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:19,739 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 18:29:19,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:29:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 18:29:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:29:19,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:19,742 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:29:19,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:29:19,943 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:19,944 INFO L82 PathProgramCache]: Analyzing trace with hash -136319988, now seen corresponding path program 2 times [2020-10-23 18:29:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:19,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990061436] [2020-10-23 18:29:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:20,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:29:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:20,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:29:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:29:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990061436] [2020-10-23 18:29:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788385452] [2020-10-23 18:29:20,211 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 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 [2020-10-23 18:29:20,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:29:20,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:29:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:29:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:29:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:29:20,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:29:20,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-10-23 18:29:20,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472647182] [2020-10-23 18:29:20,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:29:20,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:29:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:29:20,531 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 19 states. [2020-10-23 18:29:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:21,544 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-23 18:29:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:29:21,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-23 18:29:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:21,545 INFO L225 Difference]: With dead ends: 66 [2020-10-23 18:29:21,545 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:29:21,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:29:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:29:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 18:29:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:29:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-23 18:29:21,567 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2020-10-23 18:29:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:21,567 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-23 18:29:21,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:29:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-23 18:29:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 18:29:21,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:21,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:21,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:29:21,785 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1870620273, now seen corresponding path program 3 times [2020-10-23 18:29:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:21,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894534214] [2020-10-23 18:29:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:21,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:29:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:21,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:29:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:21,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:29:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:29:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:29:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894534214] [2020-10-23 18:29:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762471526] [2020-10-23 18:29:21,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-23 18:29:22,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 18:29:22,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:29:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 18:29:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:29:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:29:22,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:29:22,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2020-10-23 18:29:22,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022268302] [2020-10-23 18:29:22,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:29:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:29:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:29:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:29:22,158 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 10 states. [2020-10-23 18:29:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:29:22,640 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-23 18:29:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:29:22,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-23 18:29:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:29:22,642 INFO L225 Difference]: With dead ends: 60 [2020-10-23 18:29:22,642 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 18:29:22,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:29:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 18:29:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-23 18:29:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 18:29:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 18:29:22,659 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 38 [2020-10-23 18:29:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:29:22,659 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 18:29:22,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:29:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 18:29:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:29:22,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:29:22,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:29:22,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:29:22,876 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:29:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:29:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 875817494, now seen corresponding path program 4 times [2020-10-23 18:29:22,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:29:22,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528587920] [2020-10-23 18:29:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:29:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:29:22,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:29:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:29:22,921 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:29:22,953 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:29:22,953 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:29:22,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:29:22,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:29:22 BoogieIcfgContainer [2020-10-23 18:29:22,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:29:23,001 INFO L168 Benchmark]: Toolchain (without parser) took 9210.06 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 143.9 MB in the beginning and 108.6 MB in the end (delta: 35.4 MB). Peak memory consumption was 111.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:29:23,001 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:29:23,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.85 ms. Allocated memory is still 168.8 MB. Free memory was 143.3 MB in the beginning and 121.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:29:23,003 INFO L168 Benchmark]: Boogie Preprocessor took 77.29 ms. Allocated memory is still 168.8 MB. Free memory was 121.4 MB in the beginning and 150.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:29:23,004 INFO L168 Benchmark]: RCFGBuilder took 687.30 ms. Allocated memory is still 168.8 MB. Free memory was 150.8 MB in the beginning and 109.9 MB in the end (delta: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:29:23,005 INFO L168 Benchmark]: TraceAbstraction took 7891.77 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 109.5 MB in the beginning and 108.6 MB in the end (delta: 910.4 kB). Peak memory consumption was 76.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:29:23,008 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 120.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 540.85 ms. Allocated memory is still 168.8 MB. Free memory was 143.3 MB in the beginning and 121.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.29 ms. Allocated memory is still 168.8 MB. Free memory was 121.4 MB in the beginning and 150.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 687.30 ms. Allocated memory is still 168.8 MB. Free memory was 150.8 MB in the beginning and 109.9 MB in the end (delta: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7891.77 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 109.5 MB in the beginning and 108.6 MB in the end (delta: 910.4 kB). Peak memory consumption was 76.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L603] int len = 2; VAL [len=2] [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L575] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L581] new_head->next = head [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L581] new_head->next = head [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L581] new_head->next = head [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L585] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L607] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L588] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) VAL [head={0:0}, head={-3:0}, len=3] [L593] return len; VAL [\result=3, head={0:0}, head={-3:0}, len=3] [L608] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L608] COND TRUE len != sll_length(s) [L613] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_length_check-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.7s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 279 SDtfs, 467 SDslu, 675 SDs, 0 SdLazy, 1380 SolverSat, 243 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=9, 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, 9 MinimizatonAttempts, 88 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 474 NumberOfCodeBlocks, 468 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 421 ConstructedInterpolants, 0 QuantifiedInterpolants, 37758 SizeOfPredicates, 9 NumberOfNonLiveVariables, 813 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 35/59 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...