/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:06:55,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:06:55,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:06:55,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:06:55,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:06:55,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:06:55,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:06:55,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:06:55,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:06:55,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:06:55,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:06:55,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:06:55,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:06:55,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:06:55,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:06:55,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:06:55,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:06:55,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:06:55,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:06:55,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:06:55,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:06:55,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:06:55,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:06:55,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:06:55,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:06:55,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:06:55,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:06:55,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:06:55,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:06:55,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:06:55,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:06:55,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:06:55,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:06:55,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:06:55,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:06:55,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:06:55,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:06:55,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:06:55,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:06:55,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:06:55,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:06:55,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:06:55,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:06:55,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:06:55,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:06:55,801 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:06:55,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:06:55,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:06:55,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:06:55,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:06:55,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:06:55,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:06:55,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:06:55,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:06:55,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:06:55,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:06:55,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:06:55,805 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:06:55,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:06:55,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:06:55,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:06:55,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:06:55,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:06:55,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:06:55,806 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:06:56,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:06:56,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:06:56,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:06:56,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:06:56,124 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:06:56,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-08-22 19:06:56,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3bf333d/6fa31a96d8d24bcbaade69dbf8a0255b/FLAGcd85ea981 [2020-08-22 19:06:56,744 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:06:56,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-08-22 19:06:56,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3bf333d/6fa31a96d8d24bcbaade69dbf8a0255b/FLAGcd85ea981 [2020-08-22 19:06:57,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3bf333d/6fa31a96d8d24bcbaade69dbf8a0255b [2020-08-22 19:06:57,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:06:57,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:06:57,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:06:57,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:06:57,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:06:57,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722a9776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57, skipping insertion in model container [2020-08-22 19:06:57,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:06:57,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:06:57,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:06:57,537 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:06:57,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:06:57,680 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:06:57,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57 WrapperNode [2020-08-22 19:06:57,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:06:57,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:06:57,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:06:57,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:06:57,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (1/1) ... [2020-08-22 19:06:57,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:06:57,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:06:57,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:06:57,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:06:57,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (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 [2020-08-22 19:06:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:06:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:06:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 19:06:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 19:06:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 19:06:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-08-22 19:06:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-08-22 19:06:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2020-08-22 19:06:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 19:06:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 19:06:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 19:06:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 19:06:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 19:06:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 19:06:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 19:06:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 19:06:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 19:06:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 19:06:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 19:06:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 19:06:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 19:06:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 19:06:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 19:06:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 19:06:57,826 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 19:06:57,826 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 19:06:57,827 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 19:06:57,827 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 19:06:57,827 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 19:06:57,828 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 19:06:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 19:06:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 19:06:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 19:06:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 19:06:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 19:06:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 19:06:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 19:06:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 19:06:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 19:06:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 19:06:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 19:06:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 19:06:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 19:06:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 19:06:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 19:06:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 19:06:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 19:06:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 19:06:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 19:06:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 19:06:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 19:06:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 19:06:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 19:06:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2020-08-22 19:06:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:06:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:06:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:06:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:06:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 19:06:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:06:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:06:57,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:06:58,169 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 19:06:58,406 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:06:58,407 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:06:58,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:06:58 BoogieIcfgContainer [2020-08-22 19:06:58,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:06:58,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:06:58,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:06:58,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:06:58,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:06:57" (1/3) ... [2020-08-22 19:06:58,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d29255d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:06:58, skipping insertion in model container [2020-08-22 19:06:58,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:06:57" (2/3) ... [2020-08-22 19:06:58,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d29255d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:06:58, skipping insertion in model container [2020-08-22 19:06:58,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:06:58" (3/3) ... [2020-08-22 19:06:58,420 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2020-08-22 19:06:58,431 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:06:58,439 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:06:58,454 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:06:58,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:06:58,477 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:06:58,477 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:06:58,478 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:06:58,478 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:06:58,478 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:06:58,479 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:06:58,479 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:06:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-08-22 19:06:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:06:58,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:06:58,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:06:58,508 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:06:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:06:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1728925643, now seen corresponding path program 1 times [2020-08-22 19:06:58,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:06:58,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629790976] [2020-08-22 19:06:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:06:58,609 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:06:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:58,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:06:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:58,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 19:06:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:06:58,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629790976] [2020-08-22 19:06:58,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:06:58,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:06:58,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592603009] [2020-08-22 19:06:58,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:06:58,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:06:58,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:06:58,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:06:58,837 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 4 states. [2020-08-22 19:06:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:06:59,074 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-08-22 19:06:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:06:59,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-08-22 19:06:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:06:59,089 INFO L225 Difference]: With dead ends: 118 [2020-08-22 19:06:59,090 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 19:06:59,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:06:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 19:06:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-08-22 19:06:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 19:06:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-08-22 19:06:59,145 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 27 [2020-08-22 19:06:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:06:59,146 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-08-22 19:06:59,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:06:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-08-22 19:06:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:06:59,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:06:59,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:06:59,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:06:59,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:06:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:06:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1737237332, now seen corresponding path program 1 times [2020-08-22 19:06:59,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:06:59,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297697242] [2020-08-22 19:06:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:06:59,155 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:06:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:06:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 19:06:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:06:59,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297697242] [2020-08-22 19:06:59,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:06:59,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:06:59,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673649523] [2020-08-22 19:06:59,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:06:59,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:06:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:06:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:06:59,270 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 6 states. [2020-08-22 19:06:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:06:59,518 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-08-22 19:06:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:06:59,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-22 19:06:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:06:59,521 INFO L225 Difference]: With dead ends: 74 [2020-08-22 19:06:59,521 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 19:06:59,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:06:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 19:06:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-08-22 19:06:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 19:06:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 19:06:59,542 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 27 [2020-08-22 19:06:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:06:59,542 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 19:06:59,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:06:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 19:06:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 19:06:59,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:06:59,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:06:59,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:06:59,545 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:06:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:06:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash 278069346, now seen corresponding path program 1 times [2020-08-22 19:06:59,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:06:59,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221096570] [2020-08-22 19:06:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:06:59,583 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:06:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:06:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 19:06:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 19:06:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:06:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:06:59,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221096570] [2020-08-22 19:06:59,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:06:59,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:06:59,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019315494] [2020-08-22 19:06:59,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:06:59,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:06:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:06:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:06:59,732 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 8 states. [2020-08-22 19:06:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:06:59,999 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-08-22 19:07:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:07:00,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-22 19:07:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:07:00,002 INFO L225 Difference]: With dead ends: 105 [2020-08-22 19:07:00,002 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 19:07:00,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:07:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 19:07:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2020-08-22 19:07:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 19:07:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-08-22 19:07:00,015 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2020-08-22 19:07:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:07:00,015 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-08-22 19:07:00,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:07:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-08-22 19:07:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 19:07:00,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:07:00,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:07:00,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:07:00,018 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:07:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:07:00,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1675692718, now seen corresponding path program 1 times [2020-08-22 19:07:00,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:07:00,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030078207] [2020-08-22 19:07:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:07:00,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:07:00,033 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:07:00,039 INFO L168 Benchmark]: Toolchain (without parser) took 2992.43 ms. Allocated memory was 137.9 MB in the beginning and 232.8 MB in the end (delta: 94.9 MB). Free memory was 100.9 MB in the beginning and 77.7 MB in the end (delta: 23.2 MB). Peak memory consumption was 118.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:00,040 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 19:07:00,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.56 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 100.9 MB in the beginning and 167.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:00,042 INFO L168 Benchmark]: Boogie Preprocessor took 71.89 ms. Allocated memory is still 202.4 MB. Free memory was 167.7 MB in the beginning and 164.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:00,043 INFO L168 Benchmark]: RCFGBuilder took 657.04 ms. Allocated memory is still 202.4 MB. Free memory was 164.7 MB in the beginning and 114.6 MB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:00,044 INFO L168 Benchmark]: TraceAbstraction took 1623.93 ms. Allocated memory was 202.4 MB in the beginning and 232.8 MB in the end (delta: 30.4 MB). Free memory was 114.6 MB in the beginning and 77.7 MB in the end (delta: 36.9 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:07:00,049 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 632.56 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 100.9 MB in the beginning and 167.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.89 ms. Allocated memory is still 202.4 MB. Free memory was 167.7 MB in the beginning and 164.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 657.04 ms. Allocated memory is still 202.4 MB. Free memory was 164.7 MB in the beginning and 114.6 MB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1623.93 ms. Allocated memory was 202.4 MB in the beginning and 232.8 MB in the end (delta: 30.4 MB). Free memory was 114.6 MB in the beginning and 77.7 MB in the end (delta: 36.9 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...