/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:16:36,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:16:36,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:16:36,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:16:36,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:16:36,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:16:36,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:16:36,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:16:36,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:16:36,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:16:36,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:16:36,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:16:36,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:16:36,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:16:36,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:16:36,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:16:36,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:16:36,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:16:36,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:16:36,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:16:36,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:16:36,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:16:36,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:16:36,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:16:36,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:16:36,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:16:36,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:16:36,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:16:36,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:16:36,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:16:36,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:16:36,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:16:36,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:16:37,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:16:37,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:16:37,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:16:37,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:16:37,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:16:37,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:16:37,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:16:37,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:16:37,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:16:37,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:16:37,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:16:37,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:16:37,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:16:37,039 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:16:37,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:16:37,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:16:37,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:16:37,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:16:37,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:16:37,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:16:37,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:16:37,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:16:37,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:16:37,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:16:37,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:16:37,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:16:37,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:16:37,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:16:37,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:16:37,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:16:37,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:16:37,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:16:37,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:16:37,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:16:37,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:16:37,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:37,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:16:37,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:16:37,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:16:37,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:16:37,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:16:37,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:16:37,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:16:37,526 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:16:37,527 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-07-21 11:16:37,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/672ca2ac2/149387060bb94e3ab047399e79ecf8cd/FLAG7f9c2b980 [2020-07-21 11:16:38,273 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:16:38,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-07-21 11:16:38,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/672ca2ac2/149387060bb94e3ab047399e79ecf8cd/FLAG7f9c2b980 [2020-07-21 11:16:38,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/672ca2ac2/149387060bb94e3ab047399e79ecf8cd [2020-07-21 11:16:38,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:16:38,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:16:38,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:16:38,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:16:38,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:16:38,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:16:38" (1/1) ... [2020-07-21 11:16:38,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39811443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:38, skipping insertion in model container [2020-07-21 11:16:38,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:16:38" (1/1) ... [2020-07-21 11:16:38,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:16:38,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:16:39,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:16:39,286 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:16:39,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:16:39,428 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:16:39,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39 WrapperNode [2020-07-21 11:16:39,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:16:39,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:16:39,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:16:39,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:16:39,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... [2020-07-21 11:16:39,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:16:39,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:16:39,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:16:39,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:16:39,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:16:39,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:16:39,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:16:39,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 11:16:39,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 11:16:39,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 11:16:39,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 11:16:39,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 11:16:39,610 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 11:16:39,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:16:39,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:16:39,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:16:39,611 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:16:39,611 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:16:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:16:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:16:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:16:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:16:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:16:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:16:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:16:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:16:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:16:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:16:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:16:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:16:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:16:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:16:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 11:16:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 11:16:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 11:16:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 11:16:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 11:16:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:16:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:16:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:16:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:16:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:16:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:16:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:16:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:16:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:16:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:16:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:16:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:16:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:16:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:16:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:16:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:16:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:16:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:16:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:16:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:16:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:16:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:16:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:16:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:16:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:16:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:16:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:16:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:16:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:16:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:16:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:16:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:16:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:16:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:16:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:16:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:16:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:16:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:16:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:16:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:16:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:16:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:16:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:16:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:16:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:16:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:16:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:16:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:16:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:16:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:16:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:16:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:16:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:16:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:16:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:16:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:16:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:16:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:16:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:16:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:16:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:16:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:16:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 11:16:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:16:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:16:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:16:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:16:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:16:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:16:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:16:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:16:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:16:40,108 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 11:16:40,324 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:16:40,326 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:16:40,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:16:40 BoogieIcfgContainer [2020-07-21 11:16:40,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:16:40,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:16:40,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:16:40,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:16:40,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:16:38" (1/3) ... [2020-07-21 11:16:40,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bf027a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:16:40, skipping insertion in model container [2020-07-21 11:16:40,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:39" (2/3) ... [2020-07-21 11:16:40,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bf027a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:16:40, skipping insertion in model container [2020-07-21 11:16:40,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:16:40" (3/3) ... [2020-07-21 11:16:40,363 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-07-21 11:16:40,381 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:16:40,404 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:16:40,424 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:16:40,454 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:16:40,455 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:16:40,455 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:16:40,455 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:16:40,455 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:16:40,455 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:16:40,455 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:16:40,455 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:16:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 11:16:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 11:16:40,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:40,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:16:40,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash 209903222, now seen corresponding path program 1 times [2020-07-21 11:16:40,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:40,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363874536] [2020-07-21 11:16:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:16:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:16:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:16:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:16:40,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:16:40,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363874536] [2020-07-21 11:16:40,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:16:40,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:16:40,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179655228] [2020-07-21 11:16:40,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:16:40,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:16:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:16:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:16:40,884 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-21 11:16:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:16:40,926 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-07-21 11:16:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:16:40,928 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 11:16:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:16:40,938 INFO L225 Difference]: With dead ends: 52 [2020-07-21 11:16:40,938 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 11:16:40,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:16:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 11:16:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 11:16:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 11:16:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-21 11:16:40,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-07-21 11:16:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:16:40,999 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-21 11:16:41,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:16:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-21 11:16:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:16:41,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:41,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:16:41,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:41,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash 919137993, now seen corresponding path program 1 times [2020-07-21 11:16:41,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:41,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083343491] [2020-07-21 11:16:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:16:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:16:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:16:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:16:41,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:16:41,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083343491] [2020-07-21 11:16:41,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:16:41,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:16:41,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647537364] [2020-07-21 11:16:41,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:16:41,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:16:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:16:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:16:41,400 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 3 states. [2020-07-21 11:16:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:16:41,458 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-07-21 11:16:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:16:41,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 11:16:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:16:41,463 INFO L225 Difference]: With dead ends: 51 [2020-07-21 11:16:41,463 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 11:16:41,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:16:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 11:16:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-21 11:16:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:16:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 11:16:41,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-21 11:16:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:16:41,491 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 11:16:41,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:16:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 11:16:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:16:41,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:41,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:16:41,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:41,711 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash 919131049, now seen corresponding path program 1 times [2020-07-21 11:16:41,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:41,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522585970] [2020-07-21 11:16:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:16:41,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:16:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:16:42,012 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 11:16:42,013 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:16:42,022 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:16:42,023 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:16:42,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 11:16:42,059 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:16:42,063 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:16:42,067 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:16:42,067 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:16:42,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 11:16:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:16:42,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:16:42,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522585970] [2020-07-21 11:16:42,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:16:42,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:16:42,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766068979] [2020-07-21 11:16:42,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:16:42,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:16:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:16:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:16:42,095 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-07-21 11:16:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:16:42,257 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-21 11:16:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:16:42,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 11:16:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:16:42,263 INFO L225 Difference]: With dead ends: 61 [2020-07-21 11:16:42,264 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 11:16:42,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:16:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 11:16:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-07-21 11:16:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:16:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-21 11:16:42,282 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2020-07-21 11:16:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:16:42,283 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-21 11:16:42,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:16:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-21 11:16:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:16:42,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:42,291 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] [2020-07-21 11:16:42,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:42,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1446652468, now seen corresponding path program 1 times [2020-07-21 11:16:42,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:42,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858849334] [2020-07-21 11:16:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:16:42,646 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:16:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:16:42,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:16:42,719 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:16:42,719 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:16:42,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:42,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:16:42 BoogieIcfgContainer [2020-07-21 11:16:42,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:16:42,993 INFO L168 Benchmark]: Toolchain (without parser) took 4460.66 ms. Allocated memory was 137.4 MB in the beginning and 233.3 MB in the end (delta: 95.9 MB). Free memory was 100.9 MB in the beginning and 90.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 106.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:16:42,994 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 11:16:42,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 887.78 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 100.5 MB in the beginning and 169.3 MB in the end (delta: -68.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:16:42,996 INFO L168 Benchmark]: Boogie Preprocessor took 85.28 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 167.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:16:42,997 INFO L168 Benchmark]: RCFGBuilder took 824.55 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 121.9 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:16:42,999 INFO L168 Benchmark]: TraceAbstraction took 2647.82 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 121.9 MB in the beginning and 90.1 MB in the end (delta: 31.8 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:16:43,003 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 887.78 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 100.5 MB in the beginning and 169.3 MB in the end (delta: -68.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.28 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 167.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 824.55 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 121.9 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2647.82 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 121.9 MB in the beginning and 90.1 MB in the end (delta: 31.8 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L523] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] List t; [L525] List p = a; VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L542] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=2, t={-2:0}] [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=2, t={-2:0}] [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 24 SDslu, 71 SDs, 0 SdLazy, 35 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, 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, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 1126 SizeOfPredicates, 5 NumberOfNonLiveVariables, 221 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...