/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:49:24,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:49:24,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:49:25,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:49:25,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:49:25,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:49:25,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:49:25,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:49:25,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:49:25,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:49:25,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:49:25,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:49:25,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:49:25,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:49:25,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:49:25,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:49:25,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:49:25,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:49:25,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:49:25,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:49:25,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:49:25,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:49:25,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:49:25,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:49:25,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:49:25,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:49:25,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:49:25,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:49:25,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:49:25,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:49:25,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:49:25,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:49:25,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:49:25,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:49:25,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:49:25,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:49:25,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:49:25,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:49:25,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:49:25,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:49:25,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:49:25,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:49:25,150 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:49:25,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:49:25,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:49:25,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:49:25,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:49:25,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:49:25,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:49:25,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:49:25,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:49:25,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:49:25,159 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:49:25,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:49:25,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:49:25,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:49:25,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:49:25,160 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:49:25,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:49:25,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:49:25,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:49:25,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:49:25,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:49:25,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:49:25,161 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:49:25,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:49:25,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:49:25,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:49:25,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:49:25,617 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:49:25,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-11-07 00:49:25,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb2e2107/72271247263c4a29984f95d1f7888259/FLAG886ecf062 [2020-11-07 00:49:26,470 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:49:26,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-11-07 00:49:26,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb2e2107/72271247263c4a29984f95d1f7888259/FLAG886ecf062 [2020-11-07 00:49:26,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb2e2107/72271247263c4a29984f95d1f7888259 [2020-11-07 00:49:26,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:49:26,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:49:26,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:49:26,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:49:26,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:49:26,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:49:26" (1/1) ... [2020-11-07 00:49:26,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbd1d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:26, skipping insertion in model container [2020-11-07 00:49:26,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:49:26" (1/1) ... [2020-11-07 00:49:26,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:49:26,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:49:27,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:49:27,152 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:49:27,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:49:27,372 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:49:27,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27 WrapperNode [2020-11-07 00:49:27,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:49:27,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:49:27,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:49:27,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:49:27,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ... [2020-11-07 00:49:27,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:49:27,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:49:27,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:49:27,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:49:27,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (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 [2020-11-07 00:49:27,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:49:27,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:49:27,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:49:27,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-07 00:49:27,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-07 00:49:27,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-11-07 00:49:27,543 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-11-07 00:49:27,543 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-11-07 00:49:27,543 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-11-07 00:49:27,543 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-11-07 00:49:27,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-11-07 00:49:27,543 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-11-07 00:49:27,544 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-11-07 00:49:27,544 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-11-07 00:49:27,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:49:27,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:49:27,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:49:27,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 00:49:27,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 00:49:27,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:49:27,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:49:27,545 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-07 00:49:27,546 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-07 00:49:27,546 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 00:49:27,546 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 00:49:27,546 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 00:49:27,546 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 00:49:27,546 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 00:49:27,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 00:49:27,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 00:49:27,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 00:49:27,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 00:49:27,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 00:49:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 00:49:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 00:49:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 00:49:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 00:49:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 00:49:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 00:49:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 00:49:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 00:49:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 00:49:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 00:49:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 00:49:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 00:49:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 00:49:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 00:49:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 00:49:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 00:49:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 00:49:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 00:49:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 00:49:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 00:49:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 00:49:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 00:49:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 00:49:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 00:49:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 00:49:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 00:49:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 00:49:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 00:49:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 00:49:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 00:49:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 00:49:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 00:49:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 00:49:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 00:49:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:49:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:49:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 00:49:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:49:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 00:49:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 00:49:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 00:49:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 00:49:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 00:49:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 00:49:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 00:49:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 00:49:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 00:49:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 00:49:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 00:49:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 00:49:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 00:49:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 00:49:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 00:49:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 00:49:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 00:49:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 00:49:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 00:49:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 00:49:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 00:49:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 00:49:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 00:49:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 00:49:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 00:49:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 00:49:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 00:49:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:49:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-11-07 00:49:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-11-07 00:49:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 00:49:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:49:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-11-07 00:49:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:49:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-11-07 00:49:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-11-07 00:49:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:49:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-11-07 00:49:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-11-07 00:49:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-11-07 00:49:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-11-07 00:49:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-11-07 00:49:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:49:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:49:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:49:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:49:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:49:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:49:28,383 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:49:28,383 INFO L298 CfgBuilder]: Removed 33 assume(true) statements. [2020-11-07 00:49:28,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:49:28 BoogieIcfgContainer [2020-11-07 00:49:28,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:49:28,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:49:28,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:49:28,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:49:28,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:49:26" (1/3) ... [2020-11-07 00:49:28,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13278c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:49:28, skipping insertion in model container [2020-11-07 00:49:28,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (2/3) ... [2020-11-07 00:49:28,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13278c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:49:28, skipping insertion in model container [2020-11-07 00:49:28,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:49:28" (3/3) ... [2020-11-07 00:49:28,396 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-11-07 00:49:28,414 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:49:28,419 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:49:28,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:49:28,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:49:28,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:49:28,461 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:49:28,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:49:28,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:49:28,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:49:28,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:49:28,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:49:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states. [2020-11-07 00:49:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:49:28,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:28,498 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] [2020-11-07 00:49:28,499 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1014782748, now seen corresponding path program 1 times [2020-11-07 00:49:28,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:28,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110219543] [2020-11-07 00:49:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:28,610 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:28,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:49:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110219543] [2020-11-07 00:49:28,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:28,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:49:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338862177] [2020-11-07 00:49:28,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:49:28,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:49:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:49:28,852 INFO L87 Difference]: Start difference. First operand 218 states. Second operand 4 states. [2020-11-07 00:49:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:29,466 INFO L93 Difference]: Finished difference Result 435 states and 587 transitions. [2020-11-07 00:49:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:49:29,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-11-07 00:49:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:29,482 INFO L225 Difference]: With dead ends: 435 [2020-11-07 00:49:29,482 INFO L226 Difference]: Without dead ends: 217 [2020-11-07 00:49:29,489 INFO L677 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 [2020-11-07 00:49:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-11-07 00:49:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2020-11-07 00:49:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-07 00:49:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2020-11-07 00:49:29,584 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 47 [2020-11-07 00:49:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:29,585 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2020-11-07 00:49:29,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:49:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2020-11-07 00:49:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 00:49:29,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:29,593 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:49:29,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:49:29,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1812534921, now seen corresponding path program 1 times [2020-11-07 00:49:29,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:29,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032207614] [2020-11-07 00:49:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:29,619 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:30,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:30,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:49:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:30,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:49:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:30,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:49:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:30,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-07 00:49:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:31,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:49:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:49:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032207614] [2020-11-07 00:49:32,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:32,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 00:49:32,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322107819] [2020-11-07 00:49:32,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 00:49:32,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 00:49:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:49:32,537 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand 34 states. [2020-11-07 00:49:33,093 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:49:33,840 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-11-07 00:49:34,816 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-11-07 00:49:35,501 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 00:49:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:40,536 INFO L93 Difference]: Finished difference Result 271 states and 306 transitions. [2020-11-07 00:49:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 00:49:40,537 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-11-07 00:49:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:40,542 INFO L225 Difference]: With dead ends: 271 [2020-11-07 00:49:40,542 INFO L226 Difference]: Without dead ends: 266 [2020-11-07 00:49:40,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 00:49:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-11-07 00:49:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 211. [2020-11-07 00:49:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-07 00:49:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 233 transitions. [2020-11-07 00:49:40,598 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 233 transitions. Word has length 91 [2020-11-07 00:49:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:40,599 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 233 transitions. [2020-11-07 00:49:40,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 00:49:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 233 transitions. [2020-11-07 00:49:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-07 00:49:40,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:40,602 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:49:40,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:49:40,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2112971725, now seen corresponding path program 1 times [2020-11-07 00:49:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:40,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840864833] [2020-11-07 00:49:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:40,610 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:40,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:40,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:49:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:41,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:49:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:41,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:49:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:41,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-07 00:49:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:42,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:49:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:49:43,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840864833] [2020-11-07 00:49:43,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:43,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 00:49:43,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376468792] [2020-11-07 00:49:43,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 00:49:43,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 00:49:43,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:49:43,162 INFO L87 Difference]: Start difference. First operand 211 states and 233 transitions. Second operand 34 states. [2020-11-07 00:49:44,460 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:49:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:51,720 INFO L93 Difference]: Finished difference Result 281 states and 319 transitions. [2020-11-07 00:49:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 00:49:51,721 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2020-11-07 00:49:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:51,726 INFO L225 Difference]: With dead ends: 281 [2020-11-07 00:49:51,726 INFO L226 Difference]: Without dead ends: 276 [2020-11-07 00:49:51,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=283, Invalid=3499, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 00:49:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-07 00:49:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 211. [2020-11-07 00:49:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-07 00:49:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions. [2020-11-07 00:49:51,778 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 93 [2020-11-07 00:49:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:51,779 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 232 transitions. [2020-11-07 00:49:51,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 00:49:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions. [2020-11-07 00:49:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-07 00:49:51,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:51,781 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-11-07 00:49:51,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:49:51,782 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:51,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:51,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1195292928, now seen corresponding path program 1 times [2020-11-07 00:49:51,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:51,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961146166] [2020-11-07 00:49:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:51,790 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:49:51,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:49:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:49:51,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:49:51,905 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:49:51,905 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:49:51,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:49:51,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:49:51 BoogieIcfgContainer [2020-11-07 00:49:51,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:49:51,930 INFO L168 Benchmark]: Toolchain (without parser) took 25183.89 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 106.1 MB in the beginning and 197.5 MB in the end (delta: -91.4 MB). Peak memory consumption was 86.3 MB. Max. memory is 8.0 GB. [2020-11-07 00:49:51,931 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:49:51,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.40 ms. Allocated memory is still 151.0 MB. Free memory was 105.4 MB in the beginning and 121.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:49:51,933 INFO L168 Benchmark]: Boogie Preprocessor took 83.18 ms. Allocated memory is still 151.0 MB. Free memory was 121.3 MB in the beginning and 117.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:49:51,934 INFO L168 Benchmark]: RCFGBuilder took 928.01 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 103.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:49:51,935 INFO L168 Benchmark]: TraceAbstraction took 23540.45 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 102.9 MB in the beginning and 197.5 MB in the end (delta: -94.6 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:49:51,938 INFO L339 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 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 616.40 ms. Allocated memory is still 151.0 MB. Free memory was 105.4 MB in the beginning and 121.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 83.18 ms. Allocated memory is still 151.0 MB. Free memory was 121.3 MB in the beginning and 117.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 928.01 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 103.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23540.45 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 102.9 MB in the beginning and 197.5 MB in the end (delta: -94.6 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L590] RET chain_node(&list) [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L597] RET chain_node(&list) [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) [L642] CALL check_seq_next(p1, p2) [L626] COND FALSE !(!(beg)) [L627] COND FALSE !(!(end)) [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg [L629] COND TRUE !(beg) [L629] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_to_dll_rev-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 15 procedures, 228 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 544 SDtfs, 1045 SDslu, 3423 SDs, 0 SdLazy, 9015 SolverSat, 327 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 143 StatesRemovedByMinimization, 3 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...