/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:23:07,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:23:07,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:23:07,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:23:07,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:23:07,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:23:07,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:23:07,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:23:07,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:23:07,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:23:07,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:23:07,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:23:07,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:23:07,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:23:07,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:23:07,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:23:07,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:23:07,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:23:07,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:23:07,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:23:07,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:23:07,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:23:07,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:23:07,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:23:07,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:23:07,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:23:07,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:23:07,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:23:07,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:23:07,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:23:07,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:23:07,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:23:07,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:23:07,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:23:07,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:23:07,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:23:07,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:23:07,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:23:07,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:23:07,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:23:07,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:23:07,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:23:07,774 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:23:07,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:23:07,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:23:07,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:23:07,776 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:23:07,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:23:07,777 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:23:07,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:23:07,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:23:07,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:23:07,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:23:07,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:23:07,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:23:07,778 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:23:07,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:23:07,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:23:07,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:23:07,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:23:07,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:23:07,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:23:07,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:23:07,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:23:07,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:23:07,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:23:07,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:23:07,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:23:07,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:07,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:23:07,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:23:07,781 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:23:08,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:23:08,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:23:08,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:23:08,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:23:08,126 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:23:08,127 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2020-07-20 11:23:08,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2297cc509/56cc05de79e54537bb0483ce295b20e6/FLAGa03528608 [2020-07-20 11:23:08,803 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:23:08,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2020-07-20 11:23:08,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2297cc509/56cc05de79e54537bb0483ce295b20e6/FLAGa03528608 [2020-07-20 11:23:09,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2297cc509/56cc05de79e54537bb0483ce295b20e6 [2020-07-20 11:23:09,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:23:09,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:23:09,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:23:09,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:23:09,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:23:09,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5536a996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09, skipping insertion in model container [2020-07-20 11:23:09,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:23:09,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:23:09,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:23:09,666 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:23:09,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:23:09,810 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:23:09,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09 WrapperNode [2020-07-20 11:23:09,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:23:09,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:23:09,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:23:09,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:23:09,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... [2020-07-20 11:23:09,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:23:09,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:23:09,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:23:09,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:23:09,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:23:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:23:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:23:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-07-20 11:23:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 11:23:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 11:23:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 11:23:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-07-20 11:23:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-07-20 11:23:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-07-20 11:23:09,974 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-07-20 11:23:09,974 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-07-20 11:23:09,974 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-07-20 11:23:09,974 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-07-20 11:23:09,975 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-07-20 11:23:09,975 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-07-20 11:23:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-07-20 11:23:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-07-20 11:23:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-07-20 11:23:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-07-20 11:23:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-07-20 11:23:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-07-20 11:23:09,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:23:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:23:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:23:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:23:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:23:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:23:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:23:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:23:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:23:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:23:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:23:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:23:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 11:23:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 11:23:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:23:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:23:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:23:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:23:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:23:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:23:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:23:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:23:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:23:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:23:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:23:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:23:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:23:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:23:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:23:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:23:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:23:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:23:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:23:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:23:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:23:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:23:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:23:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:23:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:23:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:23:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:23:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:23:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:23:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:23:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:23:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:23:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:23:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:23:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 11:23:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-07-20 11:23:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:23:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:23:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-07-20 11:23:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-07-20 11:23:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:23:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-07-20 11:23:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:23:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-07-20 11:23:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 11:23:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-07-20 11:23:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-07-20 11:23:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-07-20 11:23:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-07-20 11:23:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-07-20 11:23:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-07-20 11:23:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:23:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:23:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:23:10,905 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:23:10,905 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-07-20 11:23:10,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:23:10 BoogieIcfgContainer [2020-07-20 11:23:10,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:23:10,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:23:10,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:23:10,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:23:10,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:23:09" (1/3) ... [2020-07-20 11:23:10,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f78f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:23:10, skipping insertion in model container [2020-07-20 11:23:10,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:23:09" (2/3) ... [2020-07-20 11:23:10,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f78f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:23:10, skipping insertion in model container [2020-07-20 11:23:10,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:23:10" (3/3) ... [2020-07-20 11:23:10,920 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2020-07-20 11:23:10,932 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:23:10,941 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:23:10,957 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:23:11,009 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:23:11,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:23:11,010 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:23:11,010 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:23:11,010 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:23:11,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:23:11,011 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:23:11,011 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:23:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-07-20 11:23:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 11:23:11,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:23:11,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-07-20 11:23:11,068 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:23:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:23:11,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-07-20 11:23:11,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:23:11,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501693295] [2020-07-20 11:23:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:11,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:23:11,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 11:23:11,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:23:11,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501693295] [2020-07-20 11:23:11,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:23:11,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:23:11,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272448141] [2020-07-20 11:23:11,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:23:11,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:23:11,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:23:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:23:11,373 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 2 states. [2020-07-20 11:23:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:23:11,430 INFO L93 Difference]: Finished difference Result 329 states and 517 transitions. [2020-07-20 11:23:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:23:11,432 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 59 [2020-07-20 11:23:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:23:11,447 INFO L225 Difference]: With dead ends: 329 [2020-07-20 11:23:11,447 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 11:23:11,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:23:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 11:23:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-20 11:23:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 11:23:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-07-20 11:23:11,517 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-07-20 11:23:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:23:11,518 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-07-20 11:23:11,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:23:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-07-20 11:23:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 11:23:11,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:23:11,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-07-20 11:23:11,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:11,739 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:23:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:23:11,740 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-07-20 11:23:11,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:23:11,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241857801] [2020-07-20 11:23:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:23:11,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 11:23:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:23:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 11:23:12,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241857801] [2020-07-20 11:23:12,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:23:12,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 11:23:12,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963968740] [2020-07-20 11:23:12,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:23:12,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:23:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:23:12,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:23:12,420 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 6 states. [2020-07-20 11:23:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:23:12,541 INFO L93 Difference]: Finished difference Result 316 states and 390 transitions. [2020-07-20 11:23:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:23:12,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-07-20 11:23:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:23:12,546 INFO L225 Difference]: With dead ends: 316 [2020-07-20 11:23:12,546 INFO L226 Difference]: Without dead ends: 168 [2020-07-20 11:23:12,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:23:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-20 11:23:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-07-20 11:23:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-20 11:23:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-07-20 11:23:12,571 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-07-20 11:23:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:23:12,571 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-07-20 11:23:12,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:23:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-07-20 11:23:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-20 11:23:12,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:23:12,576 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:23:12,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:12,790 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:23:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:23:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-07-20 11:23:12,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:23:12,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153246809] [2020-07-20 11:23:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 11:23:13,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:13,181 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:13,181 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 47 [2020-07-20 11:23:13,182 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:13,214 INFO L624 ElimStorePlain]: treesize reduction 20, result has 60.8 percent of original size [2020-07-20 11:23:13,217 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:23:13,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:8 [2020-07-20 11:23:13,267 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2020-07-20 11:23:13,268 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:13,271 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:13,271 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:23:13,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2020-07-20 11:23:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-07-20 11:23:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:23:14,533 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2020-07-20 11:23:14,535 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 11:23:14,593 INFO L624 ElimStorePlain]: treesize reduction 38, result has 47.2 percent of original size [2020-07-20 11:23:14,596 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 11:23:14,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:7 [2020-07-20 11:23:14,612 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 174 [2020-07-20 11:23:14,614 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 11:23:14,734 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-20 11:23:14,736 INFO L624 ElimStorePlain]: treesize reduction 127, result has 21.6 percent of original size [2020-07-20 11:23:14,737 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-07-20 11:23:14,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:20 [2020-07-20 11:23:14,904 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:23:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-07-20 11:23:15,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153246809] [2020-07-20 11:23:15,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:23:15,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-07-20 11:23:15,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254570247] [2020-07-20 11:23:15,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:23:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:23:15,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:23:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:23:15,120 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 21 states. [2020-07-20 11:23:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:23:15,940 INFO L93 Difference]: Finished difference Result 299 states and 361 transitions. [2020-07-20 11:23:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 11:23:15,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 154 [2020-07-20 11:23:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:23:15,948 INFO L225 Difference]: With dead ends: 299 [2020-07-20 11:23:15,951 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 11:23:15,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:23:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 11:23:15,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 194. [2020-07-20 11:23:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-20 11:23:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2020-07-20 11:23:16,002 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 154 [2020-07-20 11:23:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:23:16,003 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2020-07-20 11:23:16,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:23:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2020-07-20 11:23:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 11:23:16,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:23:16,011 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:23:16,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:16,213 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:23:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:23:16,214 INFO L82 PathProgramCache]: Analyzing trace with hash -547179998, now seen corresponding path program 1 times [2020-07-20 11:23:16,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:23:16,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12422349] [2020-07-20 11:23:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 313 conjunts are in the unsatisfiable core [2020-07-20 11:23:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:16,498 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:23:16,499 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:16,519 INFO L624 ElimStorePlain]: treesize reduction 4, result has 86.7 percent of original size [2020-07-20 11:23:16,520 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:23:16,520 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:26 [2020-07-20 11:23:16,546 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 11:23:16,547 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:16,567 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:16,574 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2020-07-20 11:23:16,575 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:16,588 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:16,593 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2020-07-20 11:23:16,594 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:16,605 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:16,606 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:23:16,606 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:35, output treesize:13 [2020-07-20 11:23:17,455 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:23:17,477 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 11:23:17,478 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:17,525 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:17,532 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 11:23:17,533 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:17,599 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:23:17,609 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2020-07-20 11:23:17,610 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:17,768 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-07-20 11:23:17,769 INFO L624 ElimStorePlain]: treesize reduction 16, result has 84.6 percent of original size [2020-07-20 11:23:17,779 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2020-07-20 11:23:17,780 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 11:23:17,912 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-07-20 11:23:17,913 INFO L624 ElimStorePlain]: treesize reduction 16, result has 85.3 percent of original size [2020-07-20 11:23:17,917 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:23:17,918 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,919 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,920 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,921 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,923 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:23:17,924 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,925 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,926 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,927 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:23:17,928 INFO L544 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 11:23:17,929 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:93, output treesize:27 [2020-07-20 11:23:19,540 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 11:23:20,825 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 11:23:21,884 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 11:24:00,104 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:24:42,262 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:24:50,427 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:25:11,809 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 11:26:06,046 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:27:04,366 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:27:28,738 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:27:28,917 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:27:54,897 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 176 [2020-07-20 11:27:54,903 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:30:03,986 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-07-20 11:30:03,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12422349] [2020-07-20 11:30:03,988 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-07-20 11:30:03,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:03,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-20 11:30:03,988 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-20 11:30:03,989 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:30:04,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:04,221 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-20 11:30:04,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:30:04 BoogieIcfgContainer [2020-07-20 11:30:04,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:30:04,223 INFO L168 Benchmark]: Toolchain (without parser) took 415169.51 ms. Allocated memory was 134.7 MB in the beginning and 365.4 MB in the end (delta: 230.7 MB). Free memory was 97.8 MB in the beginning and 144.9 MB in the end (delta: -47.1 MB). Peak memory consumption was 183.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:04,224 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:30:04,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 754.19 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 97.6 MB in the beginning and 161.8 MB in the end (delta: -64.2 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:04,225 INFO L168 Benchmark]: Boogie Preprocessor took 97.83 ms. Allocated memory is still 199.8 MB. Free memory was 161.8 MB in the beginning and 157.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:04,226 INFO L168 Benchmark]: RCFGBuilder took 1001.07 ms. Allocated memory is still 199.8 MB. Free memory was 157.5 MB in the beginning and 83.0 MB in the end (delta: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:04,227 INFO L168 Benchmark]: TraceAbstraction took 413309.03 ms. Allocated memory was 199.8 MB in the beginning and 365.4 MB in the end (delta: 165.7 MB). Free memory was 83.0 MB in the beginning and 144.9 MB in the end (delta: -61.9 MB). Peak memory consumption was 103.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:04,230 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 754.19 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 97.6 MB in the beginning and 161.8 MB in the end (delta: -64.2 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.83 ms. Allocated memory is still 199.8 MB. Free memory was 161.8 MB in the beginning and 157.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1001.07 ms. Allocated memory is still 199.8 MB. Free memory was 157.5 MB in the beginning and 83.0 MB in the end (delta: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 413309.03 ms. Allocated memory was 199.8 MB in the beginning and 365.4 MB in the end (delta: 165.7 MB). Free memory was 83.0 MB in the beginning and 144.9 MB in the end (delta: -61.9 MB). Peak memory consumption was 103.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 536]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L672] CALL, EXPR dll_create_master() [L630] CALL, EXPR dll_create_generic(dll_insert_master) [L577] void *dll = ((void *)0); [L578] CALL insert_fnc(&dll) [L620] CALL, EXPR alloc_or_die_master() [L558] struct master_item *ptr = malloc(sizeof(*ptr)); [L559] COND FALSE !(!ptr) [L561] ptr->next = ((void *)0) [L562] ptr->prev = ((void *)0) [L563] ptr->slave = ((void *)0) [L564] return ptr; [L620] RET, EXPR alloc_or_die_master() [L620] struct master_item *item = alloc_or_die_master(); [L621] EXPR \read(**dll) [L621] struct master_item *next = *dll; [L622] item->next = next [L623] COND TRUE \read(*next) [L624] next->prev = item [L625] CALL, EXPR dll_create_slave() [L586] CALL, EXPR dll_create_generic(dll_insert_slave) [L577] void *dll = ((void *)0); [L578] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L578] RET insert_fnc(&dll) [L579] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L579] RET insert_fnc(&dll) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L582] EXPR \read(*dll) [L582] return dll; [L577] void *dll = ((void *)0); [L582] return dll; [L586] RET, EXPR dll_create_generic(dll_insert_slave) [L586] return dll_create_generic(dll_insert_slave); [L625] RET, EXPR dll_create_slave() [L625] item->slave = dll_create_slave() [L626] *dll = item [L578] RET insert_fnc(&dll) [L579] CALL insert_fnc(&dll) [L620] CALL, EXPR alloc_or_die_master() [L558] struct master_item *ptr = malloc(sizeof(*ptr)); [L559] COND FALSE !(!ptr) [L561] ptr->next = ((void *)0) [L562] ptr->prev = ((void *)0) [L563] ptr->slave = ((void *)0) [L564] return ptr; [L620] RET, EXPR alloc_or_die_master() [L620] struct master_item *item = alloc_or_die_master(); [L621] EXPR \read(**dll) [L621] struct master_item *next = *dll; [L622] item->next = next [L623] COND TRUE \read(*next) [L624] next->prev = item [L625] CALL, EXPR dll_create_slave() [L586] CALL, EXPR dll_create_generic(dll_insert_slave) [L577] void *dll = ((void *)0); [L578] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L578] RET insert_fnc(&dll) [L579] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L579] RET insert_fnc(&dll) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L582] EXPR \read(*dll) [L582] return dll; [L577] void *dll = ((void *)0); [L582] return dll; [L586] RET, EXPR dll_create_generic(dll_insert_slave) [L586] return dll_create_generic(dll_insert_slave); [L625] RET, EXPR dll_create_slave() [L625] item->slave = dll_create_slave() [L626] *dll = item [L579] RET insert_fnc(&dll) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L582] EXPR \read(*dll) [L582] return dll; [L577] void *dll = ((void *)0); [L582] return dll; [L630] RET, EXPR dll_create_generic(dll_insert_master) [L630] return dll_create_generic(dll_insert_master); [L672] RET, EXPR dll_create_master() [L672] struct master_item *dll = dll_create_master(); [L673] CALL inspect_full(dll) [L645] CALL inspect_base(dll) [L634] COND FALSE !(!(dll)) [L635] EXPR dll->next [L635] COND TRUE !(dll->next) [L635] CALL fail() [L536] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 22 procedures, 175 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 413.1s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 556 SDtfs, 154 SDslu, 3865 SDs, 0 SdLazy, 690 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 492 GetRequests, 458 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=194occurred in iteration=3, 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, 3 MinimizatonAttempts, 35 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 482 ConstructedInterpolants, 0 QuantifiedInterpolants, 113085 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1387 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 401/411 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...