/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 --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/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:48,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:48,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:48,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:48,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:48,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:48,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:48,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:48,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:48,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:48,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:48,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:48,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:48,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:48,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:48,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:48,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:48,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:48,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:48,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:48,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:48,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:48,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:48,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:48,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:20:48,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:20:48,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:20:48,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:20:48,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:20:48,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:20:48,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:20:48,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:20:48,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:20:48,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:20:48,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:20:48,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:20:48,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:20:48,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:20:48,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:48,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:48,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:48,545 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 [2020-09-21 10:20:48,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:48,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:48,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:48,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:48,574 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:48,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:48,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:48,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:48,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:48,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:48,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:48,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:48,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:48,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:48,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:48,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:48,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:48,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:48,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:48,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:48,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:48,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:48,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:48,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:48,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:48,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:48,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:48,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:48,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:48,579 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.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:20:49,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:49,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:49,059 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:49,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:49,061 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:49,062 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-09-21 10:20:49,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d95e89e4/8d2f7806d7dd426284b29e2a8aec314b/FLAG5c92a9feb [2020-09-21 10:20:49,776 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:49,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-1.i [2020-09-21 10:20:49,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d95e89e4/8d2f7806d7dd426284b29e2a8aec314b/FLAG5c92a9feb [2020-09-21 10:20:50,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d95e89e4/8d2f7806d7dd426284b29e2a8aec314b [2020-09-21 10:20:50,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:50,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:50,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:50,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:50,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:50,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e51550b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50, skipping insertion in model container [2020-09-21 10:20:50,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:50,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:50,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:50,722 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:50,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:50,823 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:50,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50 WrapperNode [2020-09-21 10:20:50,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:50,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:50,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:50,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:50,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (1/1) ... [2020-09-21 10:20:50,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:50,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:50,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:50,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:50,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (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 [2020-09-21 10:20:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 10:20:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 10:20:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 10:20:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 10:20:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 10:20:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 10:20:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 10:20:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 10:20:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 10:20:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 10:20:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 10:20:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 10:20:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 10:20:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 10:20:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 10:20:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 10:20:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 10:20:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 10:20:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 10:20:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 10:20:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 10:20:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 10:20:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 10:20:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 10:20:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 10:20:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 10:20:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 10:20:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 10:20:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 10:20:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 10:20:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 10:20:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 10:20:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 10:20:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 10:20:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 10:20:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 10:20:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 10:20:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 10:20:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 10:20:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 10:20:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 10:20:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 10:20:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 10:20:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 10:20:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 10:20:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 10:20:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 10:20:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 10:20:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 10:20:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:20:51,013 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 10:20:51,013 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 10:20:51,013 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:20:51,013 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 10:20:51,014 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 10:20:51,014 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 10:20:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 10:20:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:20:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 10:20:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 10:20:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 10:20:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:20:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 10:20:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 10:20:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 10:20:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 10:20:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 10:20:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 10:20:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 10:20:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 10:20:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 10:20:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 10:20:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 10:20:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 10:20:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 10:20:51,020 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 10:20:51,020 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 10:20:51,020 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 10:20:51,020 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 10:20:51,020 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 10:20:51,020 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 10:20:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 10:20:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 10:20:51,023 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 10:20:51,023 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 10:20:51,023 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 10:20:51,023 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 10:20:51,023 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 10:20:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 10:20:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 10:20:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:20:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:20:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:20:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:20:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:20:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:20:51,408 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 10:20:51,626 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:51,627 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 10:20:51,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:51 BoogieIcfgContainer [2020-09-21 10:20:51,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:51,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:51,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:51,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:51,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:50" (1/3) ... [2020-09-21 10:20:51,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23408883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:51, skipping insertion in model container [2020-09-21 10:20:51,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:50" (2/3) ... [2020-09-21 10:20:51,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23408883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:51, skipping insertion in model container [2020-09-21 10:20:51,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:51" (3/3) ... [2020-09-21 10:20:51,641 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-09-21 10:20:51,653 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:51,663 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:51,685 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:51,711 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:51,711 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:51,711 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:51,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:51,712 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:51,712 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:51,712 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:51,712 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-21 10:20:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:20:51,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:51,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:51,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:51,753 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-09-21 10:20:51,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:51,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479830531] [2020-09-21 10:20:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:51,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:52,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479830531] [2020-09-21 10:20:52,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:52,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:52,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153922971] [2020-09-21 10:20:52,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:52,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:52,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:52,039 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-09-21 10:20:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:52,168 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-09-21 10:20:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:52,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:20:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:52,181 INFO L225 Difference]: With dead ends: 54 [2020-09-21 10:20:52,181 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 10:20:52,185 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 [2020-09-21 10:20:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 10:20:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 10:20:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 10:20:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-09-21 10:20:52,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-09-21 10:20:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:52,266 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-09-21 10:20:52,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-09-21 10:20:52,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:52,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:52,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:52,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:52,268 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-09-21 10:20:52,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:52,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674305512] [2020-09-21 10:20:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:52,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674305512] [2020-09-21 10:20:52,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:52,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:52,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274580086] [2020-09-21 10:20:52,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:52,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:52,431 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-09-21 10:20:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:52,593 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-09-21 10:20:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:20:52,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-21 10:20:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:52,599 INFO L225 Difference]: With dead ends: 44 [2020-09-21 10:20:52,599 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:20:52,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:20:52,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-09-21 10:20:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:20:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-09-21 10:20:52,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2020-09-21 10:20:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:52,616 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-09-21 10:20:52,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-09-21 10:20:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:52,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:52,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:52,619 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-09-21 10:20:52,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:52,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962303568] [2020-09-21 10:20:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:52,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:52,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962303568] [2020-09-21 10:20:52,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:52,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:52,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016058295] [2020-09-21 10:20:52,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:52,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:52,733 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-09-21 10:20:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:52,839 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-09-21 10:20:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:20:52,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 10:20:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:52,843 INFO L225 Difference]: With dead ends: 51 [2020-09-21 10:20:52,843 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:20:52,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:20:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-09-21 10:20:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 10:20:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-09-21 10:20:52,855 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2020-09-21 10:20:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:52,856 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-09-21 10:20:52,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-09-21 10:20:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:52,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:52,860 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] [2020-09-21 10:20:52,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:52,860 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-09-21 10:20:52,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:52,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344818055] [2020-09-21 10:20:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:53,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:53,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344818055] [2020-09-21 10:20:53,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:53,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:20:53,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98109085] [2020-09-21 10:20:53,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:20:53,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:20:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:20:53,012 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-09-21 10:20:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:53,189 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-09-21 10:20:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:20:53,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-21 10:20:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:53,191 INFO L225 Difference]: With dead ends: 74 [2020-09-21 10:20:53,191 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 10:20:53,192 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 [2020-09-21 10:20:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 10:20:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-09-21 10:20:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 10:20:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-09-21 10:20:53,206 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-09-21 10:20:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:53,207 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-09-21 10:20:53,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:20:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-09-21 10:20:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:53,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:53,212 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-09-21 10:20:53,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:53,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238222044] [2020-09-21 10:20:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:20:53,316 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:20:53,319 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:20:53,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:53,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:53 BoogieIcfgContainer [2020-09-21 10:20:53,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:53,362 INFO L168 Benchmark]: Toolchain (without parser) took 3305.03 ms. Allocated memory was 139.5 MB in the beginning and 235.9 MB in the end (delta: 96.5 MB). Free memory was 100.2 MB in the beginning and 123.3 MB in the end (delta: -23.1 MB). Peak memory consumption was 73.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:53,363 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:53,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 762.69 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 99.5 MB in the beginning and 169.2 MB in the end (delta: -69.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:53,369 INFO L168 Benchmark]: Boogie Preprocessor took 74.64 ms. Allocated memory is still 203.4 MB. Free memory was 169.2 MB in the beginning and 165.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:53,375 INFO L168 Benchmark]: RCFGBuilder took 731.68 ms. Allocated memory is still 203.4 MB. Free memory was 165.9 MB in the beginning and 119.7 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:53,377 INFO L168 Benchmark]: TraceAbstraction took 1725.23 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 119.0 MB in the beginning and 123.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:53,387 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 762.69 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 99.5 MB in the beginning and 169.2 MB in the end (delta: -69.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.64 ms. Allocated memory is still 203.4 MB. Free memory was 169.2 MB in the beginning and 165.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 731.68 ms. Allocated memory is still 203.4 MB. Free memory was 165.9 MB in the beginning and 119.7 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1725.23 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 119.0 MB in the beginning and 123.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: 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 l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a [L549] EXPR p->h [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 [L549] EXPR p->h [L549] COND FALSE !(p->h != 3) [L562] p = l1 [L563] COND TRUE p != 0 [L564] EXPR p->h [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 28 SDslu, 164 SDs, 0 SdLazy, 245 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 3646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...