/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/ldv-regression/alt_test.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:09:48,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:09:48,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:09:48,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:09:48,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:09:48,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:09:48,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:09:48,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:09:48,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:09:48,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:09:48,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:09:48,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:09:48,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:09:48,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:09:48,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:09:48,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:09:48,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:09:48,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:09:48,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:09:48,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:09:48,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:09:48,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:09:48,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:09:48,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:09:48,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 16:09:48,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 16:09:48,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 16:09:48,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 16:09:48,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 16:09:48,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 16:09:48,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 16:09:48,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 16:09:48,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 16:09:48,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 16:09:48,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 16:09:48,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 16:09:48,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 16:09:48,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 16:09:48,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:09:48,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:09:48,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:09:48,377 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 [2021-02-21 16:09:48,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:09:48,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:09:48,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:09:48,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:09:48,427 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:09:48,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:09:48,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:09:48,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:09:48,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:09:48,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:09:48,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:09:48,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:09:48,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:09:48,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:09:48,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:09:48,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:09:48,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:09:48,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:09:48,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:09:48,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:09:48,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:09:48,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:09:48,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:09:48,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:09:48,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:09:48,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:09:48,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:09:48,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:09:48,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:09:48,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:09:48,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:09:48,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:09:48,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:09:48,828 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:09:48,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alt_test.i [2021-02-21 16:09:48,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae60fe43/6d6f2dfb08374b89971c9b0fb6094f02/FLAG08bbbdf31 [2021-02-21 16:09:49,576 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:09:49,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/alt_test.i [2021-02-21 16:09:49,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae60fe43/6d6f2dfb08374b89971c9b0fb6094f02/FLAG08bbbdf31 [2021-02-21 16:09:49,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae60fe43/6d6f2dfb08374b89971c9b0fb6094f02 [2021-02-21 16:09:49,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:09:49,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:09:49,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:09:49,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:09:49,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:09:49,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:09:49" (1/1) ... [2021-02-21 16:09:49,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450947d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:49, skipping insertion in model container [2021-02-21 16:09:49,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:09:49" (1/1) ... [2021-02-21 16:09:49,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:09:50,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:09:50,347 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/alt_test.i[22285,22298] [2021-02-21 16:09:50,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:09:50,380 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:09:50,452 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/alt_test.i[22285,22298] [2021-02-21 16:09:50,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:09:50,519 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:09:50,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50 WrapperNode [2021-02-21 16:09:50,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:09:50,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:09:50,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:09:50,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:09:50,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (1/1) ... [2021-02-21 16:09:50,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:09:50,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:09:50,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:09:50,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:09:50,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (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 [2021-02-21 16:09:50,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:09:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:09:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:09:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 16:09:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 16:09:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-21 16:09:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-21 16:09:50,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-21 16:09:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-21 16:09:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:09:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure l_malloc [2021-02-21 16:09:50,702 INFO L138 BoogieDeclarations]: Found implementation of procedure l_free [2021-02-21 16:09:50,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:09:50,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:09:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:09:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:09:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 16:09:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 16:09:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 16:09:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 16:09:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 16:09:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 16:09:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 16:09:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 16:09:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 16:09:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 16:09:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 16:09:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 16:09:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 16:09:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 16:09:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-21 16:09:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 16:09:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 16:09:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 16:09:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 16:09:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 16:09:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 16:09:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 16:09:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 16:09:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 16:09:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 16:09:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 16:09:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 16:09:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 16:09:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 16:09:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 16:09:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 16:09:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 16:09:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 16:09:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 16:09:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 16:09:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 16:09:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 16:09:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 16:09:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 16:09:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 16:09:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 16:09:50,724 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 16:09:50,724 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 16:09:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 16:09:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 16:09:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 16:09:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 16:09:50,726 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 16:09:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 16:09:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 16:09:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 16:09:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure l_malloc [2021-02-21 16:09:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure l_free [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:09:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:09:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:09:51,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:09:51,407 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:09:51,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:09:51 BoogieIcfgContainer [2021-02-21 16:09:51,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:09:51,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:09:51,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:09:51,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:09:51,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:09:49" (1/3) ... [2021-02-21 16:09:51,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0acb06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:09:51, skipping insertion in model container [2021-02-21 16:09:51,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:09:50" (2/3) ... [2021-02-21 16:09:51,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0acb06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:09:51, skipping insertion in model container [2021-02-21 16:09:51,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:09:51" (3/3) ... [2021-02-21 16:09:51,434 INFO L111 eAbstractionObserver]: Analyzing ICFG alt_test.i [2021-02-21 16:09:51,443 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:09:51,449 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:09:51,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:09:51,520 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:09:51,521 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:09:51,521 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:09:51,521 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:09:51,521 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:09:51,521 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:09:51,521 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:09:51,522 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:09:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-21 16:09:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:09:51,551 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:09:51,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:09:51,552 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:09:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:09:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1024515637, now seen corresponding path program 1 times [2021-02-21 16:09:51,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:09:51,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126911780] [2021-02-21 16:09:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:09:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:51,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:51,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:09:51,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:09:51,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:51,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:09:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:51,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:51,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:09:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:51,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:51,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:51,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:09:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:09:52,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126911780] [2021-02-21 16:09:52,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:09:52,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:09:52,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125116189] [2021-02-21 16:09:52,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:09:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:09:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:09:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:09:52,028 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2021-02-21 16:09:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:09:52,210 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-02-21 16:09:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:09:52,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-02-21 16:09:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:09:52,226 INFO L225 Difference]: With dead ends: 55 [2021-02-21 16:09:52,226 INFO L226 Difference]: Without dead ends: 33 [2021-02-21 16:09:52,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:09:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-21 16:09:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-02-21 16:09:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-21 16:09:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-02-21 16:09:52,282 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2021-02-21 16:09:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:09:52,282 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-02-21 16:09:52,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:09:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-02-21 16:09:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:09:52,284 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:09:52,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:09:52,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:09:52,285 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:09:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:09:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -323451059, now seen corresponding path program 1 times [2021-02-21 16:09:52,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:09:52,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192246813] [2021-02-21 16:09:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:09:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:09:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:09:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:09:52,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:09:52,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192246813] [2021-02-21 16:09:52,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:09:52,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:09:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48530125] [2021-02-21 16:09:52,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:09:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:09:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:09:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:09:52,441 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2021-02-21 16:09:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:09:52,510 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-02-21 16:09:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:09:52,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-02-21 16:09:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:09:52,512 INFO L225 Difference]: With dead ends: 42 [2021-02-21 16:09:52,513 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 16:09:52,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:09:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 16:09:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-21 16:09:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-21 16:09:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-02-21 16:09:52,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2021-02-21 16:09:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:09:52,524 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-02-21 16:09:52,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:09:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-02-21 16:09:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:09:52,525 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:09:52,526 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] [2021-02-21 16:09:52,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:09:52,526 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:09:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:09:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash 119074525, now seen corresponding path program 1 times [2021-02-21 16:09:52,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:09:52,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039073380] [2021-02-21 16:09:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:09:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:09:52,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:09:52,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:09:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:09:52,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:09:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:09:52,707 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 16:09:52,708 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 16:09:52,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:09:52,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 16:09:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:09:52,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:09:52,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:09:52,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:09:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:09:52,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039073380] [2021-02-21 16:09:52,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:09:52,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 16:09:52,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771027350] [2021-02-21 16:09:52,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 16:09:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:09:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 16:09:52,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-21 16:09:52,802 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2021-02-21 16:09:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:09:53,065 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-02-21 16:09:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 16:09:53,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-02-21 16:09:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:09:53,067 INFO L225 Difference]: With dead ends: 40 [2021-02-21 16:09:53,067 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 16:09:53,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-21 16:09:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 16:09:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-21 16:09:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-21 16:09:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-02-21 16:09:53,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-02-21 16:09:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:09:53,094 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-02-21 16:09:53,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 16:09:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-02-21 16:09:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:09:53,095 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:09:53,097 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] [2021-02-21 16:09:53,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:09:53,097 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:09:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:09:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2073107059, now seen corresponding path program 1 times [2021-02-21 16:09:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:09:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150556981] [2021-02-21 16:09:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:09:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:09:53,147 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:09:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:09:53,163 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:09:53,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:09:53,197 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:09:53,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:09:53,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:09:53 BoogieIcfgContainer [2021-02-21 16:09:53,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:09:53,240 INFO L168 Benchmark]: Toolchain (without parser) took 3335.39 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 125.3 MB in the beginning and 151.4 MB in the end (delta: -26.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:53,241 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:09:53,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.89 ms. Allocated memory is still 152.0 MB. Free memory was 124.1 MB in the beginning and 103.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:53,242 INFO L168 Benchmark]: Boogie Preprocessor took 54.97 ms. Allocated memory is still 152.0 MB. Free memory was 103.3 MB in the beginning and 101.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:53,243 INFO L168 Benchmark]: RCFGBuilder took 834.10 ms. Allocated memory is still 152.0 MB. Free memory was 101.0 MB in the beginning and 97.4 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:53,244 INFO L168 Benchmark]: TraceAbstraction took 1825.48 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 96.9 MB in the beginning and 151.4 MB in the end (delta: -54.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:09:53,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 598.89 ms. Allocated memory is still 152.0 MB. Free memory was 124.1 MB in the beginning and 103.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.97 ms. Allocated memory is still 152.0 MB. Free memory was 103.3 MB in the beginning and 101.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 834.10 ms. Allocated memory is still 152.0 MB. Free memory was 101.0 MB in the beginning and 97.4 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1825.48 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 96.9 MB in the beginning and 151.4 MB in the end (delta: -54.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; VAL [\old(globalState)=54, globalState=0] [L523] CALL, EXPR l_malloc(sizeof(int)) VAL [\old(globalState)=0, \old(size)=4, globalState=0] [L529] void *retVal = malloc(size); VAL [\old(globalState)=0, \old(size)=4, globalState=0, malloc(size)={1:0}, retVal={1:0}, size=4] [L530] COND TRUE retVal != ((void *)0) [L531] globalState=1 VAL [\old(globalState)=0, \old(size)=4, globalState=1, malloc(size)={1:0}, retVal={1:0}, size=4] [L532] return retVal; VAL [\old(globalState)=0, \old(size)=4, \result={1:0}, globalState=1, malloc(size)={1:0}, retVal={1:0}, size=4] [L523] RET, EXPR l_malloc(sizeof(int)) VAL [\old(argc)=60, \old(globalState)=0, argc=60, argv={56:51}, argv={56:51}, globalState=1, l_malloc(sizeof(int))={1:0}] [L523] int *a = (int*) l_malloc(sizeof(int)); [L524] CALL l_free(a) VAL [\old(globalState)=1, globalState=1, ptr={1:0}] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=1, globalState=1, ptr={1:0}, ptr={1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=1, globalState=1, ptr={1:0}, ptr={1:0}] [L536] globalState = 0 [L524] RET l_free(a) VAL [\old(argc)=60, \old(globalState)=0, a={1:0}, argc=60, argv={56:51}, argv={56:51}, globalState=0] [L525] CALL l_free(a) VAL [\old(globalState)=0, globalState=0, ptr={1:0}] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=0, globalState=0, ptr={1:0}, ptr={1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=0, globalState=0, ptr={1:0}, ptr={1:0}] [L535] CALL __blast_assert () VAL [\old(globalState)=0, globalState=0] [L516] reach_error() VAL [\old(globalState)=0, globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 41 SDslu, 136 SDs, 0 SdLazy, 190 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5520 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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...