/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -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-c90d42b [2020-09-24 14:58:04,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:58:04,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:58:05,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:58:05,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:58:05,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:58:05,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:58:05,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:58:05,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:58:05,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:58:05,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:58:05,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:58:05,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:58:05,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:58:05,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:58:05,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:58:05,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:58:05,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:58:05,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:58:05,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:58:05,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:58:05,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:58:05,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:58:05,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:58:05,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:58:05,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:58:05,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:58:05,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:58:05,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:58:05,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:58:05,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:58:05,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:58:05,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:58:05,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:58:05,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:58:05,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:58:05,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:58:05,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:58:05,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:58:05,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:58:05,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:58:05,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:58:05,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:58:05,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:58:05,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:58:05,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:58:05,159 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:58:05,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:58:05,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:58:05,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:58:05,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:58:05,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:58:05,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:58:05,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:58:05,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:58:05,163 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:58:05,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:58:05,163 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:58:05,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:58:05,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:58:05,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:58:05,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:58:05,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:58:05,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:58:05,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:58:05,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:58:05,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:58:05,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:58:05,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:58:05,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:58:05,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:58:05,166 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:58:05,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:58:05,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:58:05,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:58:05,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:58:05,631 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:58:05,633 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-24 14:58:05,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d55c2e974/2ab56d3daf8f41c39e6e4e68a3dd9590/FLAG40b7c4d93 [2020-09-24 14:58:06,371 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:58:06,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-24 14:58:06,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d55c2e974/2ab56d3daf8f41c39e6e4e68a3dd9590/FLAG40b7c4d93 [2020-09-24 14:58:06,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d55c2e974/2ab56d3daf8f41c39e6e4e68a3dd9590 [2020-09-24 14:58:06,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:58:06,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:58:06,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:58:06,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:58:06,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:58:06,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:58:06" (1/1) ... [2020-09-24 14:58:06,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:06, skipping insertion in model container [2020-09-24 14:58:06,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:58:06" (1/1) ... [2020-09-24 14:58:06,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:58:06,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:58:07,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:58:07,238 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:58:07,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:58:07,354 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:58:07,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07 WrapperNode [2020-09-24 14:58:07,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:58:07,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:58:07,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:58:07,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:58:07,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... [2020-09-24 14:58:07,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:58:07,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:58:07,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:58:07,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:58:07,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 14:58:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:58:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:58:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 14:58:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 14:58:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-24 14:58:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-24 14:58:07,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-24 14:58:07,522 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 14:58:07,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:58:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:58:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:58:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:58:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:58:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:58:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:58:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:58:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:58:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:58:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:58:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:58:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:58:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:58:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:58:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:58:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:58:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:58:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:58:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 14:58:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 14:58:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-24 14:58:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-24 14:58:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-24 14:58:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:58:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:58:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:58:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:58:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:58:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:58:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:58:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:58:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:58:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:58:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:58:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:58:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:58:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:58:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:58:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:58:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:58:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:58:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:58:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:58:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:58:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:58:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:58:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:58:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:58:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:58:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:58:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:58:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:58:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:58:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:58:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:58:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:58:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:58:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:58:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:58:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:58:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:58:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:58:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:58:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:58:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:58:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:58:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:58:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:58:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:58:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:58:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:58:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:58:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:58:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:58:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:58:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:58:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:58:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:58:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:58:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:58:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:58:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:58:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:58:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:58:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:58:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:58:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:58:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 14:58:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:58:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:58:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:58:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:58:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:58:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:58:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:58:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:58:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:58:07,927 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 14:58:08,144 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:58:08,145 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 14:58:08,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:58:08 BoogieIcfgContainer [2020-09-24 14:58:08,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:58:08,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:58:08,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:58:08,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:58:08,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:58:06" (1/3) ... [2020-09-24 14:58:08,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33574c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:58:08, skipping insertion in model container [2020-09-24 14:58:08,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:58:07" (2/3) ... [2020-09-24 14:58:08,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33574c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:58:08, skipping insertion in model container [2020-09-24 14:58:08,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:58:08" (3/3) ... [2020-09-24 14:58:08,160 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-09-24 14:58:08,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:58:08,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:58:08,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:58:08,240 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:58:08,241 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:58:08,241 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:58:08,241 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:58:08,241 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:58:08,241 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:58:08,242 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:58:08,242 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:58:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-09-24 14:58:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 14:58:08,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:08,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:08,280 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:08,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1267394549, now seen corresponding path program 1 times [2020-09-24 14:58:08,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:08,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115823473] [2020-09-24 14:58:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:08,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:58:08,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115823473] [2020-09-24 14:58:08,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:08,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:58:08,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604119463] [2020-09-24 14:58:08,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:58:08,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:58:08,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:08,591 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-09-24 14:58:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:08,835 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-09-24 14:58:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:58:08,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-24 14:58:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:08,850 INFO L225 Difference]: With dead ends: 112 [2020-09-24 14:58:08,851 INFO L226 Difference]: Without dead ends: 51 [2020-09-24 14:58:08,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:58:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-24 14:58:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-24 14:58:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 14:58:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-24 14:58:08,915 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 26 [2020-09-24 14:58:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:08,916 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-24 14:58:08,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:58:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-24 14:58:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 14:58:08,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:08,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:08,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:58:08,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:08,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1487998036, now seen corresponding path program 1 times [2020-09-24 14:58:08,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:08,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904357485] [2020-09-24 14:58:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:09,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:58:09,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904357485] [2020-09-24 14:58:09,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:09,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:58:09,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121830047] [2020-09-24 14:58:09,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:58:09,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:58:09,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:58:09,042 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 4 states. [2020-09-24 14:58:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:09,200 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-09-24 14:58:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:58:09,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-09-24 14:58:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:09,203 INFO L225 Difference]: With dead ends: 116 [2020-09-24 14:58:09,203 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 14:58:09,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:58:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 14:58:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-09-24 14:58:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 14:58:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-09-24 14:58:09,215 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 28 [2020-09-24 14:58:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:09,216 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-09-24 14:58:09,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:58:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-09-24 14:58:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 14:58:09,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:09,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:09,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:58:09,218 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1813416041, now seen corresponding path program 1 times [2020-09-24 14:58:09,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:09,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854269959] [2020-09-24 14:58:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:09,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:58:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:58:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:58:09,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854269959] [2020-09-24 14:58:09,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:58:09,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:58:09,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457205939] [2020-09-24 14:58:09,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:58:09,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:58:09,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:58:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:58:09,339 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 7 states. [2020-09-24 14:58:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:58:09,539 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-09-24 14:58:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:58:09,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-24 14:58:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:58:09,541 INFO L225 Difference]: With dead ends: 126 [2020-09-24 14:58:09,541 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 14:58:09,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:58:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 14:58:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-09-24 14:58:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 14:58:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-09-24 14:58:09,551 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 28 [2020-09-24 14:58:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:58:09,552 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-09-24 14:58:09,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:58:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-09-24 14:58:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 14:58:09,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:58:09,554 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:58:09,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:58:09,554 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:58:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:58:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash -223654578, now seen corresponding path program 1 times [2020-09-24 14:58:09,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:58:09,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383209533] [2020-09-24 14:58:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:58:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:58:09,596 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:58:09,597 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:58:09,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:58:09,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:58:09 BoogieIcfgContainer [2020-09-24 14:58:09,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:58:09,636 INFO L168 Benchmark]: Toolchain (without parser) took 2979.19 ms. Allocated memory was 140.5 MB in the beginning and 238.6 MB in the end (delta: 98.0 MB). Free memory was 101.5 MB in the beginning and 129.8 MB in the end (delta: -28.3 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:09,637 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 14:58:09,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.72 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 100.8 MB in the beginning and 171.6 MB in the end (delta: -70.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:09,640 INFO L168 Benchmark]: Boogie Preprocessor took 73.33 ms. Allocated memory is still 205.0 MB. Free memory was 171.6 MB in the beginning and 169.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:09,642 INFO L168 Benchmark]: RCFGBuilder took 720.45 ms. Allocated memory is still 205.0 MB. Free memory was 169.0 MB in the beginning and 120.9 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:09,649 INFO L168 Benchmark]: TraceAbstraction took 1479.07 ms. Allocated memory was 205.0 MB in the beginning and 238.6 MB in the end (delta: 33.6 MB). Free memory was 120.2 MB in the beginning and 129.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:58:09,661 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 695.72 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 100.8 MB in the beginning and 171.6 MB in the end (delta: -70.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.33 ms. Allocated memory is still 205.0 MB. Free memory was 171.6 MB in the beginning and 169.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 720.45 ms. Allocated memory is still 205.0 MB. Free memory was 169.0 MB in the beginning and 120.9 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1479.07 ms. Allocated memory was 205.0 MB in the beginning and 238.6 MB in the end (delta: 33.6 MB). Free memory was 120.2 MB in the beginning and 129.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 24.0 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)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 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 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 64 SDslu, 206 SDs, 0 SdLazy, 251 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred 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, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 79 ConstructedInterpolants, 0 QuantifiedInterpolants, 4198 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...