/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/forester-heap/sll-token-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:52:12,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:52:12,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:52:12,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:52:12,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:52:12,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:52:12,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:52:12,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:52:12,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:52:12,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:52:12,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:52:12,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:52:12,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:52:12,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:52:12,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:52:12,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:52:12,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:52:12,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:52:12,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:52:12,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:52:12,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:52:12,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:52:12,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:52:12,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:52:12,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:52:12,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:52:12,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:52:12,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:52:12,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:52:12,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:52:12,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:52:12,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:52:12,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:52:12,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:52:12,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:52:12,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:52:12,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:52:12,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:52:12,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:52:12,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:52:12,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:52:12,119 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 [2020-08-27 21:52:12,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:52:12,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:52:12,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:52:12,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:52:12,151 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:52:12,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:52:12,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:52:12,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:52:12,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:52:12,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:52:12,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:52:12,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:52:12,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:52:12,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:52:12,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:52:12,153 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:52:12,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:52:12,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:52:12,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:52:12,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:52:12,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:52:12,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:52:12,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:52:12,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:52:12,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:52:12,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:52:12,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:52:12,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:52:12,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:52:12,156 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 [2020-08-27 21:52:12,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:52:12,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:52:12,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:52:12,747 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:52:12,747 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:52:12,750 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-token-1.i [2020-08-27 21:52:12,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21db1de12/fc32bbff4bc341c79af34ebd915feb74/FLAG4ee55822e [2020-08-27 21:52:13,485 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:52:13,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-token-1.i [2020-08-27 21:52:13,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21db1de12/fc32bbff4bc341c79af34ebd915feb74/FLAG4ee55822e [2020-08-27 21:52:13,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21db1de12/fc32bbff4bc341c79af34ebd915feb74 [2020-08-27 21:52:13,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:52:13,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:52:13,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:52:13,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:52:13,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:52:13,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:52:13" (1/1) ... [2020-08-27 21:52:13,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490952e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:13, skipping insertion in model container [2020-08-27 21:52:13,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:52:13" (1/1) ... [2020-08-27 21:52:13,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:52:13,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:52:14,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:52:14,332 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:52:14,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:52:14,455 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:52:14,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14 WrapperNode [2020-08-27 21:52:14,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:52:14,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:52:14,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:52:14,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:52:14,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (1/1) ... [2020-08-27 21:52:14,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:52:14,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:52:14,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:52:14,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:52:14,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (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 [2020-08-27 21:52:14,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:52:14,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:52:14,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:52:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-27 21:52:14,639 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-27 21:52:14,639 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-27 21:52:14,640 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-27 21:52:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-27 21:52:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-27 21:52:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-27 21:52:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-27 21:52:14,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-27 21:52:14,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-27 21:52:14,643 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-27 21:52:14,643 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-27 21:52:14,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-27 21:52:14,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-27 21:52:14,644 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-27 21:52:14,644 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-27 21:52:14,645 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-27 21:52:14,645 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-27 21:52:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-27 21:52:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-27 21:52:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-27 21:52:14,648 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-27 21:52:14,648 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-27 21:52:14,648 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-27 21:52:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-27 21:52:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-27 21:52:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-27 21:52:14,650 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-27 21:52:14,650 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-27 21:52:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-27 21:52:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-27 21:52:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-27 21:52:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-27 21:52:14,652 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-27 21:52:14,652 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-27 21:52:14,652 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-27 21:52:14,652 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-27 21:52:14,652 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-27 21:52:14,653 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-27 21:52:14,653 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-27 21:52:14,653 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-27 21:52:14,653 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-27 21:52:14,653 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-27 21:52:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-27 21:52:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-27 21:52:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-27 21:52:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-27 21:52:14,656 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:52:14,656 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-27 21:52:14,656 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-27 21:52:14,657 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-27 21:52:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-27 21:52:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-27 21:52:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:52:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-27 21:52:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-27 21:52:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-27 21:52:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-27 21:52:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-27 21:52:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-27 21:52:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-27 21:52:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-27 21:52:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-27 21:52:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-27 21:52:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-27 21:52:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-27 21:52:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-27 21:52:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-27 21:52:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-27 21:52:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-27 21:52:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-27 21:52:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-27 21:52:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-27 21:52:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-27 21:52:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-27 21:52:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-27 21:52:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-27 21:52:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-27 21:52:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-27 21:52:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-27 21:52:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-27 21:52:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-27 21:52:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-27 21:52:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-27 21:52:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-27 21:52:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-27 21:52:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:52:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:52:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:52:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:52:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:52:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:52:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:52:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:52:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:52:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:52:15,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:52:15,272 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-08-27 21:52:15,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:52:15 BoogieIcfgContainer [2020-08-27 21:52:15,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:52:15,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:52:15,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:52:15,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:52:15,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:52:13" (1/3) ... [2020-08-27 21:52:15,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712e0eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:52:15, skipping insertion in model container [2020-08-27 21:52:15,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:14" (2/3) ... [2020-08-27 21:52:15,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712e0eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:52:15, skipping insertion in model container [2020-08-27 21:52:15,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:52:15" (3/3) ... [2020-08-27 21:52:15,288 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-token-1.i [2020-08-27 21:52:15,302 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:52:15,313 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-08-27 21:52:15,336 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-08-27 21:52:15,364 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:52:15,364 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:52:15,364 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:52:15,365 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:52:15,365 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:52:15,365 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:52:15,365 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:52:15,365 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:52:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-08-27 21:52:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-27 21:52:15,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:15,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:15,397 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-08-27 21:52:15,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:15,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746823761] [2020-08-27 21:52:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:15,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746823761] [2020-08-27 21:52:15,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:15,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:52:15,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708943426] [2020-08-27 21:52:15,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:52:15,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:15,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:52:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:52:15,696 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-08-27 21:52:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:15,857 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-08-27 21:52:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:52:15,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-27 21:52:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:15,872 INFO L225 Difference]: With dead ends: 92 [2020-08-27 21:52:15,872 INFO L226 Difference]: Without dead ends: 43 [2020-08-27 21:52:15,877 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 [2020-08-27 21:52:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-27 21:52:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-27 21:52:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-27 21:52:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-08-27 21:52:15,947 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-08-27 21:52:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:15,948 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-08-27 21:52:15,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:52:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-08-27 21:52:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-27 21:52:15,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:15,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:15,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:52:15,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-08-27 21:52:15,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:15,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121830047] [2020-08-27 21:52:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:16,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121830047] [2020-08-27 21:52:16,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:16,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:16,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943397547] [2020-08-27 21:52:16,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:16,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:16,094 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2020-08-27 21:52:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:16,209 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-08-27 21:52:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:16,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-08-27 21:52:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:16,211 INFO L225 Difference]: With dead ends: 43 [2020-08-27 21:52:16,211 INFO L226 Difference]: Without dead ends: 41 [2020-08-27 21:52:16,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-27 21:52:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-27 21:52:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-27 21:52:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-27 21:52:16,220 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-08-27 21:52:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:16,221 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-27 21:52:16,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-27 21:52:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-27 21:52:16,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:16,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:16,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:52:16,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-08-27 21:52:16,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:16,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994452017] [2020-08-27 21:52:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:16,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994452017] [2020-08-27 21:52:16,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:16,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:52:16,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128324674] [2020-08-27 21:52:16,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:16,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:16,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:16,325 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 5 states. [2020-08-27 21:52:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:16,448 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-08-27 21:52:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:52:16,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-27 21:52:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:16,450 INFO L225 Difference]: With dead ends: 67 [2020-08-27 21:52:16,450 INFO L226 Difference]: Without dead ends: 65 [2020-08-27 21:52:16,451 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 [2020-08-27 21:52:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-27 21:52:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-08-27 21:52:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-27 21:52:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-27 21:52:16,460 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-08-27 21:52:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:16,461 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-27 21:52:16,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-27 21:52:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:52:16,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:16,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:16,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:52:16,463 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-08-27 21:52:16,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:16,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153830210] [2020-08-27 21:52:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:52:16,502 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:52:16,502 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:52:16,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:52:16,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:52:16 BoogieIcfgContainer [2020-08-27 21:52:16,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:52:16,532 INFO L168 Benchmark]: Toolchain (without parser) took 2833.07 ms. Allocated memory was 146.8 MB in the beginning and 235.9 MB in the end (delta: 89.1 MB). Free memory was 100.3 MB in the beginning and 157.9 MB in the end (delta: -57.5 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:16,533 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:52:16,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 758.97 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 100.1 MB in the beginning and 170.1 MB in the end (delta: -69.9 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:16,535 INFO L168 Benchmark]: Boogie Preprocessor took 83.03 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 166.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:16,536 INFO L168 Benchmark]: RCFGBuilder took 736.67 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 121.3 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:16,537 INFO L168 Benchmark]: TraceAbstraction took 1249.10 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 121.3 MB in the beginning and 157.9 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:52:16,541 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 758.97 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 100.1 MB in the beginning and 170.1 MB in the end (delta: -69.9 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.03 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 166.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 736.67 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 121.3 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1249.10 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 121.3 MB in the beginning and 157.9 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1020]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* head = malloc(sizeof(SLL)); [L993] head->next = ((void*)0) [L994] head->data = 0 [L996] SLL* x = head; [L999] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x->data = 1 [L1008] x->next = malloc(sizeof(SLL)) [L1009] EXPR x->next [L1009] x->next->data = 2 [L1011] x = head [L1013] COND FALSE !(!(((void*)0) != x)) [L1015] EXPR x->data [L1015] COND FALSE !(1 != x->data) [L1020] EXPR x->data [L1020] COND TRUE !(2 == x->data) [L1020] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 76 SDslu, 61 SDs, 0 SdLazy, 169 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred 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, 26 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 661 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...