/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-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:42:43,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:42:43,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:42:43,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:42:43,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:42:43,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:42:43,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:42:43,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:42:43,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:42:43,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:42:43,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:42:43,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:42:43,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:42:43,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:42:43,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:42:43,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:42:43,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:42:43,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:42:43,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:42:43,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:42:43,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:42:43,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:42:43,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:42:43,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:42:43,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:42:43,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:42:43,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:42:43,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:42:43,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:42:43,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:42:43,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:42:43,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:42:43,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:42:43,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:42:43,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:42:43,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:42:43,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:42:43,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:42:43,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:42:43,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:42:43,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:42:43,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:42:43,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:42:43,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:42:43,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:42:43,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:42:43,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:42:43,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:42:43,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:42:43,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:42:43,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:42:43,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:42:43,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:42:43,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:42:43,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:42:43,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:42:43,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:42:43,576 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:42:43,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:42:43,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:42:43,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:43,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:42:43,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:42:43,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:42:43,578 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:42:44,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:42:44,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:42:44,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:42:44,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:42:44,033 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:42:44,034 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-04 16:42:44,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd7329305/4b7e45e613aa49e78bb7cddf26d9fac8/FLAGe287c6d8a [2020-09-04 16:42:44,716 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:42:44,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-04 16:42:44,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd7329305/4b7e45e613aa49e78bb7cddf26d9fac8/FLAGe287c6d8a [2020-09-04 16:42:44,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd7329305/4b7e45e613aa49e78bb7cddf26d9fac8 [2020-09-04 16:42:44,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:42:44,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:42:44,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:44,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:42:44,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:42:44,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:44" (1/1) ... [2020-09-04 16:42:44,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb2c9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:44, skipping insertion in model container [2020-09-04 16:42:44,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:44" (1/1) ... [2020-09-04 16:42:45,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:42:45,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:42:45,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:45,553 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:42:45,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:45,669 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:42:45,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45 WrapperNode [2020-09-04 16:42:45,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:45,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:42:45,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:42:45,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:42:45,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... [2020-09-04 16:42:45,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:42:45,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:42:45,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:42:45,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:42:45,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:45,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:42:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:42:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:42:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:42:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 16:42:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-04 16:42:45,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:42:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:42:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:42:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:42:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:42:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:42:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:42:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:42:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:42:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:42:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:42:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:42:45,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:42:45,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:42:45,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:42:45,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:42:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:42:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:42:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:42:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:42:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:42:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:42:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:42:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:42:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:42:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:42:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:42:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:42:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:42:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:42:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:42:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:42:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:42:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:42:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:42:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:42:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:42:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:42:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:42:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:42:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:42:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:42:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:42:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:42:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:42:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:42:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 16:42:45,830 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:42:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:42:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 16:42:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:42:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:42:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:42:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:42:45,841 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:42:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:42:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:42:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:42:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:42:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:42:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:42:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 16:42:45,844 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:42:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:42:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:42:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:42:46,161 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 16:42:46,464 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:42:46,464 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 16:42:46,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:46 BoogieIcfgContainer [2020-09-04 16:42:46,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:42:46,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:42:46,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:42:46,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:42:46,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:42:44" (1/3) ... [2020-09-04 16:42:46,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78833ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:46, skipping insertion in model container [2020-09-04 16:42:46,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:45" (2/3) ... [2020-09-04 16:42:46,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78833ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:46, skipping insertion in model container [2020-09-04 16:42:46,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:46" (3/3) ... [2020-09-04 16:42:46,479 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-09-04 16:42:46,490 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:42:46,500 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:42:46,521 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:42:46,544 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:42:46,544 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:42:46,544 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:42:46,545 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:42:46,545 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:42:46,545 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:42:46,545 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:42:46,545 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:42:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-09-04 16:42:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 16:42:46,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:46,581 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] [2020-09-04 16:42:46,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash 136898680, now seen corresponding path program 1 times [2020-09-04 16:42:46,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:46,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578147068] [2020-09-04 16:42:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:46,688 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:46,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:46,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:46,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578147068] [2020-09-04 16:42:46,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:46,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:42:46,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198365000] [2020-09-04 16:42:46,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:42:46,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:42:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:42:46,913 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 4 states. [2020-09-04 16:42:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:47,267 INFO L93 Difference]: Finished difference Result 230 states and 265 transitions. [2020-09-04 16:42:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:42:47,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-04 16:42:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:47,284 INFO L225 Difference]: With dead ends: 230 [2020-09-04 16:42:47,285 INFO L226 Difference]: Without dead ends: 153 [2020-09-04 16:42:47,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:42:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-04 16:42:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2020-09-04 16:42:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-04 16:42:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-09-04 16:42:47,351 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 32 [2020-09-04 16:42:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:47,351 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-09-04 16:42:47,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:42:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-09-04 16:42:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 16:42:47,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:47,354 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] [2020-09-04 16:42:47,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:42:47,355 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash 272796752, now seen corresponding path program 1 times [2020-09-04 16:42:47,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:47,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007996669] [2020-09-04 16:42:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:47,360 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:47,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:47,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007996669] [2020-09-04 16:42:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:47,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:42:47,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625494866] [2020-09-04 16:42:47,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:42:47,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:42:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:42:47,532 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 7 states. [2020-09-04 16:42:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:47,853 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2020-09-04 16:42:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 16:42:47,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-09-04 16:42:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:47,855 INFO L225 Difference]: With dead ends: 172 [2020-09-04 16:42:47,856 INFO L226 Difference]: Without dead ends: 112 [2020-09-04 16:42:47,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:42:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-04 16:42:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-04 16:42:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-04 16:42:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-09-04 16:42:47,873 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 32 [2020-09-04 16:42:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:47,873 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-09-04 16:42:47,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:42:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-09-04 16:42:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 16:42:47,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:47,876 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] [2020-09-04 16:42:47,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:42:47,877 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:47,877 INFO L82 PathProgramCache]: Analyzing trace with hash -54471897, now seen corresponding path program 1 times [2020-09-04 16:42:47,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:47,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956521437] [2020-09-04 16:42:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:47,943 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:48,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:48,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:48,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956521437] [2020-09-04 16:42:48,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:48,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:42:48,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071719039] [2020-09-04 16:42:48,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:42:48,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:42:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:42:48,223 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 9 states. [2020-09-04 16:42:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:48,582 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2020-09-04 16:42:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 16:42:48,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-04 16:42:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:48,584 INFO L225 Difference]: With dead ends: 193 [2020-09-04 16:42:48,584 INFO L226 Difference]: Without dead ends: 133 [2020-09-04 16:42:48,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:42:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-04 16:42:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2020-09-04 16:42:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 16:42:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-09-04 16:42:48,600 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 51 [2020-09-04 16:42:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:48,601 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-09-04 16:42:48,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:42:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-09-04 16:42:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-04 16:42:48,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:48,603 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:48,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:42:48,604 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash -586426640, now seen corresponding path program 2 times [2020-09-04 16:42:48,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:48,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510903322] [2020-09-04 16:42:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:48,639 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:48,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:48,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:48,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510903322] [2020-09-04 16:42:48,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:48,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:42:48,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109326541] [2020-09-04 16:42:48,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:42:48,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:48,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:42:48,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:42:48,808 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 7 states. [2020-09-04 16:42:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:49,079 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2020-09-04 16:42:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:42:49,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-09-04 16:42:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:49,081 INFO L225 Difference]: With dead ends: 195 [2020-09-04 16:42:49,082 INFO L226 Difference]: Without dead ends: 114 [2020-09-04 16:42:49,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:42:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-04 16:42:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-09-04 16:42:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 16:42:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-09-04 16:42:49,097 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 70 [2020-09-04 16:42:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:49,098 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-09-04 16:42:49,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:42:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-09-04 16:42:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-04 16:42:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:49,101 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:49,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:42:49,101 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1356086606, now seen corresponding path program 1 times [2020-09-04 16:42:49,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:49,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342137806] [2020-09-04 16:42:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:49,129 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:49,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342137806] [2020-09-04 16:42:49,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:49,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 16:42:49,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050445376] [2020-09-04 16:42:49,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 16:42:49,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 16:42:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:42:49,416 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 11 states. [2020-09-04 16:42:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:49,777 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2020-09-04 16:42:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 16:42:49,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-09-04 16:42:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:49,780 INFO L225 Difference]: With dead ends: 214 [2020-09-04 16:42:49,780 INFO L226 Difference]: Without dead ends: 154 [2020-09-04 16:42:49,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-04 16:42:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-04 16:42:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2020-09-04 16:42:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-04 16:42:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2020-09-04 16:42:49,798 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 71 [2020-09-04 16:42:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:49,799 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2020-09-04 16:42:49,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 16:42:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2020-09-04 16:42:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 16:42:49,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:49,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-09-04 16:42:49,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:42:49,803 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1395228995, now seen corresponding path program 2 times [2020-09-04 16:42:49,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:49,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244029830] [2020-09-04 16:42:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:49,850 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:50,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244029830] [2020-09-04 16:42:50,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:50,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 16:42:50,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535917680] [2020-09-04 16:42:50,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 16:42:50,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 16:42:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-04 16:42:50,244 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand 13 states. [2020-09-04 16:42:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:50,667 INFO L93 Difference]: Finished difference Result 235 states and 255 transitions. [2020-09-04 16:42:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 16:42:50,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-09-04 16:42:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:50,670 INFO L225 Difference]: With dead ends: 235 [2020-09-04 16:42:50,670 INFO L226 Difference]: Without dead ends: 175 [2020-09-04 16:42:50,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-09-04 16:42:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-04 16:42:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2020-09-04 16:42:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-04 16:42:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2020-09-04 16:42:50,705 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 91 [2020-09-04 16:42:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:50,705 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2020-09-04 16:42:50,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 16:42:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2020-09-04 16:42:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-04 16:42:50,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:50,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:50,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:42:50,717 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash 274581320, now seen corresponding path program 3 times [2020-09-04 16:42:50,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:50,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499301574] [2020-09-04 16:42:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:50,758 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:51,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499301574] [2020-09-04 16:42:51,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:51,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:42:51,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318859876] [2020-09-04 16:42:51,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:42:51,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:42:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:42:51,161 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand 15 states. [2020-09-04 16:42:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:51,632 INFO L93 Difference]: Finished difference Result 256 states and 277 transitions. [2020-09-04 16:42:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:42:51,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 111 [2020-09-04 16:42:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:51,634 INFO L225 Difference]: With dead ends: 256 [2020-09-04 16:42:51,634 INFO L226 Difference]: Without dead ends: 196 [2020-09-04 16:42:51,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-09-04 16:42:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-04 16:42:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2020-09-04 16:42:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 16:42:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2020-09-04 16:42:51,655 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 111 [2020-09-04 16:42:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:51,656 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2020-09-04 16:42:51,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:42:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2020-09-04 16:42:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 16:42:51,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:51,664 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:51,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:42:51,665 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1182686291, now seen corresponding path program 4 times [2020-09-04 16:42:51,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:51,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336199595] [2020-09-04 16:42:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:51,734 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:52,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336199595] [2020-09-04 16:42:52,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:52,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:52,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151334409] [2020-09-04 16:42:52,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:52,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:52,286 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand 17 states. [2020-09-04 16:42:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:53,114 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-09-04 16:42:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 16:42:53,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-09-04 16:42:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:53,117 INFO L225 Difference]: With dead ends: 308 [2020-09-04 16:42:53,117 INFO L226 Difference]: Without dead ends: 253 [2020-09-04 16:42:53,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:42:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-04 16:42:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 183. [2020-09-04 16:42:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-04 16:42:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 197 transitions. [2020-09-04 16:42:53,152 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 197 transitions. Word has length 131 [2020-09-04 16:42:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:53,152 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 197 transitions. [2020-09-04 16:42:53,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 197 transitions. [2020-09-04 16:42:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-04 16:42:53,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:53,154 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:53,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:42:53,155 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1200683152, now seen corresponding path program 1 times [2020-09-04 16:42:53,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:53,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646571718] [2020-09-04 16:42:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:53,200 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:53,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:53,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646571718] [2020-09-04 16:42:53,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:53,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 16:42:53,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815904721] [2020-09-04 16:42:53,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 16:42:53,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:53,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 16:42:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:42:53,773 INFO L87 Difference]: Start difference. First operand 183 states and 197 transitions. Second operand 18 states. [2020-09-04 16:42:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:55,034 INFO L93 Difference]: Finished difference Result 286 states and 310 transitions. [2020-09-04 16:42:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 16:42:55,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2020-09-04 16:42:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:55,037 INFO L225 Difference]: With dead ends: 286 [2020-09-04 16:42:55,037 INFO L226 Difference]: Without dead ends: 231 [2020-09-04 16:42:55,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 16:42:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-04 16:42:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 187. [2020-09-04 16:42:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-04 16:42:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 201 transitions. [2020-09-04 16:42:55,065 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 201 transitions. Word has length 133 [2020-09-04 16:42:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:55,068 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 201 transitions. [2020-09-04 16:42:55,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 16:42:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 201 transitions. [2020-09-04 16:42:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-04 16:42:55,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:55,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:55,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:42:55,070 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2062394754, now seen corresponding path program 1 times [2020-09-04 16:42:55,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:55,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035935938] [2020-09-04 16:42:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:55,103 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:55,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:55,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:42:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:55,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035935938] [2020-09-04 16:42:55,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:55,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:55,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572911364] [2020-09-04 16:42:55,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:55,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:55,683 INFO L87 Difference]: Start difference. First operand 187 states and 201 transitions. Second operand 17 states. [2020-09-04 16:42:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:56,790 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2020-09-04 16:42:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 16:42:56,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2020-09-04 16:42:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:56,792 INFO L225 Difference]: With dead ends: 281 [2020-09-04 16:42:56,792 INFO L226 Difference]: Without dead ends: 253 [2020-09-04 16:42:56,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:42:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-04 16:42:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2020-09-04 16:42:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-04 16:42:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-09-04 16:42:56,817 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 135 [2020-09-04 16:42:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:56,818 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-09-04 16:42:56,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-09-04 16:42:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-04 16:42:56,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:56,820 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:56,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:42:56,820 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash -414346707, now seen corresponding path program 1 times [2020-09-04 16:42:56,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:56,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103792462] [2020-09-04 16:42:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:56,842 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:42:56,941 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:42:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:42:57,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:42:57,157 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:42:57,158 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:42:57,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:42:57,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:42:57 BoogieIcfgContainer [2020-09-04 16:42:57,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:42:57,233 INFO L168 Benchmark]: Toolchain (without parser) took 12242.22 ms. Allocated memory was 145.8 MB in the beginning and 352.3 MB in the end (delta: 206.6 MB). Free memory was 100.3 MB in the beginning and 155.6 MB in the end (delta: -55.3 MB). Peak memory consumption was 151.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:57,233 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 145.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 16:42:57,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.78 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 170.0 MB in the end (delta: -69.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:57,239 INFO L168 Benchmark]: Boogie Preprocessor took 71.52 ms. Allocated memory is still 203.9 MB. Free memory was 170.0 MB in the beginning and 166.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:57,239 INFO L168 Benchmark]: RCFGBuilder took 727.04 ms. Allocated memory is still 203.9 MB. Free memory was 166.7 MB in the beginning and 116.1 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:57,247 INFO L168 Benchmark]: TraceAbstraction took 10754.58 ms. Allocated memory was 203.9 MB in the beginning and 352.3 MB in the end (delta: 148.4 MB). Free memory was 115.5 MB in the beginning and 155.6 MB in the end (delta: -40.1 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:57,255 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 145.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.78 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 170.0 MB in the end (delta: -69.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.52 ms. Allocated memory is still 203.9 MB. Free memory was 170.0 MB in the beginning and 166.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 727.04 ms. Allocated memory is still 203.9 MB. Free memory was 166.7 MB in the beginning and 116.1 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10754.58 ms. Allocated memory was 203.9 MB in the beginning and 352.3 MB in the end (delta: 148.4 MB). Free memory was 115.5 MB in the beginning and 155.6 MB in the end (delta: -40.1 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 112 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.6s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 920 SDtfs, 1505 SDslu, 6243 SDs, 0 SdLazy, 3420 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 328 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...