/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 0.2.1-dev-36cd7be [2021-02-23 18:03:30,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:03:30,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:03:31,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:03:31,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:03:31,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:03:31,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:03:31,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:03:31,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:03:31,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:03:31,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:03:31,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:03:31,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:03:31,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:03:31,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:03:31,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:03:31,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:03:31,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:03:31,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:03:31,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:03:31,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:03:31,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:03:31,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:03:31,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:03:31,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:03:31,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:03:31,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:03:31,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:03:31,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:03:31,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:03:31,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:03:31,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:03:31,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:03:31,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:03:31,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:03:31,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:03:31,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:03:31,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:03:31,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:03:31,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:03:31,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:03:31,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:03:31,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:03:31,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:03:31,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:03:31,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:03:31,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:03:31,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:03:31,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:03:31,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:03:31,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:03:31,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:03:31,137 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:03:31,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:03:31,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:03:31,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:03:31,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:03:31,138 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:03:31,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:03:31,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:03:31,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:03:31,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:03:31,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:03:31,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:03:31,140 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:03:31,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:03:31,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:03:31,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:03:31,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:03:31,594 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:03:31,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2021-02-23 18:03:31,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8eeb94d/e912741914ec4f0a9c886ef58c325dd6/FLAGb38b53784 [2021-02-23 18:03:32,434 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:03:32,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2021-02-23 18:03:32,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8eeb94d/e912741914ec4f0a9c886ef58c325dd6/FLAGb38b53784 [2021-02-23 18:03:32,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8eeb94d/e912741914ec4f0a9c886ef58c325dd6 [2021-02-23 18:03:32,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:03:32,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:03:32,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:03:32,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:03:32,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:03:32,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:03:32" (1/1) ... [2021-02-23 18:03:32,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4235f3a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:32, skipping insertion in model container [2021-02-23 18:03:32,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:03:32" (1/1) ... [2021-02-23 18:03:32,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:03:32,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:03:33,165 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-02-23 18:03:33,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:03:33,242 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:03:33,310 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-02-23 18:03:33,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:03:33,409 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:03:33,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33 WrapperNode [2021-02-23 18:03:33,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:03:33,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:03:33,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:03:33,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:03:33,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (1/1) ... [2021-02-23 18:03:33,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:03:33,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:03:33,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:03:33,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:03:33,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (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 [2021-02-23 18:03:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:03:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:03:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:03:33,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 18:03:33,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 18:03:33,686 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-02-23 18:03:33,686 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2021-02-23 18:03:33,686 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-02-23 18:03:33,687 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2021-02-23 18:03:33,687 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2021-02-23 18:03:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2021-02-23 18:03:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2021-02-23 18:03:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-02-23 18:03:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-02-23 18:03:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:03:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:03:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:03:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:03:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:03:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:03:33,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:03:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 18:03:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 18:03:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 18:03:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 18:03:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 18:03:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 18:03:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 18:03:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 18:03:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 18:03:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 18:03:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 18:03:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 18:03:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 18:03:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 18:03:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 18:03:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 18:03:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 18:03:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 18:03:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 18:03:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 18:03:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 18:03:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 18:03:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 18:03:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 18:03:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 18:03:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 18:03:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 18:03:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 18:03:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 18:03:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 18:03:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 18:03:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 18:03:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 18:03:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 18:03:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 18:03:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 18:03:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 18:03:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 18:03:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 18:03:33,701 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 18:03:33,701 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 18:03:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 18:03:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 18:03:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 18:03:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 18:03:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 18:03:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 18:03:33,703 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 18:03:33,703 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 18:03:33,703 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 18:03:33,703 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 18:03:33,703 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 18:03:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 18:03:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 18:03:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 18:03:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 18:03:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 18:03:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 18:03:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 18:03:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 18:03:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 18:03:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 18:03:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:03:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 18:03:33,708 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 18:03:33,708 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 18:03:33,708 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 18:03:33,708 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 18:03:33,709 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 18:03:33,709 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 18:03:33,709 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 18:03:33,710 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 18:03:33,710 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 18:03:33,710 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 18:03:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 18:03:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 18:03:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 18:03:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 18:03:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 18:03:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 18:03:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 18:03:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 18:03:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 18:03:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 18:03:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 18:03:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 18:03:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 18:03:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 18:03:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 18:03:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 18:03:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 18:03:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 18:03:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 18:03:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 18:03:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 18:03:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 18:03:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 18:03:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 18:03:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 18:03:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 18:03:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 18:03:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:03:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-02-23 18:03:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2021-02-23 18:03:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 18:03:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 18:03:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-02-23 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2021-02-23 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-02-23 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2021-02-23 18:03:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2021-02-23 18:03:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2021-02-23 18:03:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-02-23 18:03:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-02-23 18:03:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:03:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:03:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:03:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:03:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:03:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:03:34,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:03:34,692 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2021-02-23 18:03:34,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:03:34 BoogieIcfgContainer [2021-02-23 18:03:34,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:03:34,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:03:34,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:03:34,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:03:34,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:03:32" (1/3) ... [2021-02-23 18:03:34,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a75ee14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:03:34, skipping insertion in model container [2021-02-23 18:03:34,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:33" (2/3) ... [2021-02-23 18:03:34,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a75ee14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:03:34, skipping insertion in model container [2021-02-23 18:03:34,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:03:34" (3/3) ... [2021-02-23 18:03:34,705 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-02-23 18:03:34,713 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:03:34,720 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:03:34,743 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:03:34,800 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:03:34,800 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:03:34,800 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:03:34,800 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:03:34,801 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:03:34,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:03:34,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:03:34,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:03:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states. [2021-02-23 18:03:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 18:03:34,861 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:34,862 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] [2021-02-23 18:03:34,863 INFO L428 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1428598154, now seen corresponding path program 1 times [2021-02-23 18:03:34,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:34,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713894950] [2021-02-23 18:03:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:34,974 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:35,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:35,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:35,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:35,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:35,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:35,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:35,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 18:03:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:35,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:35,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:35,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:35,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:35,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713894950] [2021-02-23 18:03:35,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:35,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:03:35,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265614775] [2021-02-23 18:03:35,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:03:35,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:03:35,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:03:35,323 INFO L87 Difference]: Start difference. First operand 213 states. Second operand 4 states. [2021-02-23 18:03:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:36,003 INFO L93 Difference]: Finished difference Result 428 states and 577 transitions. [2021-02-23 18:03:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:03:36,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2021-02-23 18:03:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:36,019 INFO L225 Difference]: With dead ends: 428 [2021-02-23 18:03:36,019 INFO L226 Difference]: Without dead ends: 215 [2021-02-23 18:03:36,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:03:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-23 18:03:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 192. [2021-02-23 18:03:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-02-23 18:03:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 212 transitions. [2021-02-23 18:03:36,101 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 212 transitions. Word has length 45 [2021-02-23 18:03:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:36,102 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 212 transitions. [2021-02-23 18:03:36,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:03:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 212 transitions. [2021-02-23 18:03:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 18:03:36,106 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:36,107 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] [2021-02-23 18:03:36,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:03:36,107 INFO L428 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash -505106365, now seen corresponding path program 1 times [2021-02-23 18:03:36,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:36,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127500948] [2021-02-23 18:03:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:36,115 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:36,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:36,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:03:36,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:03:36,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:36,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:36,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:36,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:36,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:36,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:36,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 18:03:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:36,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:03:36,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:03:36,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:03:36,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 18:03:36,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-02-23 18:03:36,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 18:03:36,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:03:36,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:03:36,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:36,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 18:03:37,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:03:37,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 18:03:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:37,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:03:37,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:03:37,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:03:37,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:37,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 18:03:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:37,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:37,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:37,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:37,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-02-23 18:03:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:37,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:03:37,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-02-23 18:03:37,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-02-23 18:03:37,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-02-23 18:03:37,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:37,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 950 [2021-02-23 18:03:38,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:38,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 950 [2021-02-23 18:03:38,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 18:03:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:38,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:38,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:03:38,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:38,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:03:38,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:38,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:03:38,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:38,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:03:38,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:38,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-02-23 18:03:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 18:03:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127500948] [2021-02-23 18:03:38,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:38,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-02-23 18:03:38,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395202645] [2021-02-23 18:03:38,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-23 18:03:38,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-23 18:03:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 18:03:38,658 INFO L87 Difference]: Start difference. First operand 192 states and 212 transitions. Second operand 35 states. [2021-02-23 18:03:39,786 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-23 18:03:41,028 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-23 18:03:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:44,988 INFO L93 Difference]: Finished difference Result 267 states and 302 transitions. [2021-02-23 18:03:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-23 18:03:44,989 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 89 [2021-02-23 18:03:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:44,993 INFO L225 Difference]: With dead ends: 267 [2021-02-23 18:03:44,993 INFO L226 Difference]: Without dead ends: 264 [2021-02-23 18:03:44,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=258, Invalid=3048, Unknown=0, NotChecked=0, Total=3306 [2021-02-23 18:03:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-23 18:03:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 209. [2021-02-23 18:03:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-02-23 18:03:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-02-23 18:03:45,043 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 89 [2021-02-23 18:03:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:45,044 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-02-23 18:03:45,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-02-23 18:03:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-02-23 18:03:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 18:03:45,046 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:45,046 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] [2021-02-23 18:03:45,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:03:45,047 INFO L428 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:45,047 INFO L82 PathProgramCache]: Analyzing trace with hash -75653267, now seen corresponding path program 1 times [2021-02-23 18:03:45,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:45,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5290917] [2021-02-23 18:03:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:45,071 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:45,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:45,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:03:45,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:03:45,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:45,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:45,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:45,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:45,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:45,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:45,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 18:03:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:45,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:03:45,378 WARN L141 QuantifierPusher]: treesize reduction 7, result has 72.0 percent of original size [2021-02-23 18:03:45,379 WARN L147 QuantifierPusher]: treesize reduction 7, result has 72.0 percent of original size 18 [2021-02-23 18:03:45,409 WARN L141 QuantifierPusher]: treesize reduction 7, result has 74.1 percent of original size [2021-02-23 18:03:45,410 WARN L147 QuantifierPusher]: treesize reduction 7, result has 74.1 percent of original size 20 [2021-02-23 18:03:45,442 WARN L141 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size [2021-02-23 18:03:45,443 WARN L147 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size 37 [2021-02-23 18:03:45,498 WARN L141 QuantifierPusher]: treesize reduction 7, result has 82.5 percent of original size [2021-02-23 18:03:45,499 WARN L147 QuantifierPusher]: treesize reduction 7, result has 82.5 percent of original size 33 [2021-02-23 18:03:45,552 WARN L141 QuantifierPusher]: treesize reduction 4, result has 87.1 percent of original size [2021-02-23 18:03:45,553 WARN L147 QuantifierPusher]: treesize reduction 4, result has 87.1 percent of original size 27 [2021-02-23 18:03:45,593 WARN L141 QuantifierPusher]: treesize reduction 4, result has 88.6 percent of original size [2021-02-23 18:03:45,594 WARN L147 QuantifierPusher]: treesize reduction 4, result has 88.6 percent of original size 31 [2021-02-23 18:03:45,633 WARN L141 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size [2021-02-23 18:03:45,634 WARN L147 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size 23 [2021-02-23 18:03:45,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:03:45,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:03:45,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 18:03:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:45,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:03:45,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:03:45,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:03:45,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:45,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 18:03:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:45,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:45,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:45,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:45,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:45,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-02-23 18:03:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:46,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:03:46,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-02-23 18:03:46,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-02-23 18:03:46,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:03:46,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 914 [2021-02-23 18:03:46,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 914 [2021-02-23 18:03:46,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 18:03:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:46,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:46,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:03:47,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:47,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 18:03:47,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:47,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:03:47,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:47,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:03:47,189 WARN L141 QuantifierPusher]: treesize reduction 96, result has 65.8 percent of original size [2021-02-23 18:03:47,190 WARN L147 QuantifierPusher]: treesize reduction 96, result has 65.8 percent of original size 185 [2021-02-23 18:03:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 18:03:47,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5290917] [2021-02-23 18:03:47,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:47,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-02-23 18:03:47,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403726580] [2021-02-23 18:03:47,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-23 18:03:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-23 18:03:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 18:03:47,475 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand 36 states. [2021-02-23 18:03:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:55,469 INFO L93 Difference]: Finished difference Result 277 states and 315 transitions. [2021-02-23 18:03:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-23 18:03:55,470 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 91 [2021-02-23 18:03:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:55,474 INFO L225 Difference]: With dead ends: 277 [2021-02-23 18:03:55,474 INFO L226 Difference]: Without dead ends: 274 [2021-02-23 18:03:55,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=299, Invalid=3733, Unknown=0, NotChecked=0, Total=4032 [2021-02-23 18:03:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-02-23 18:03:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 209. [2021-02-23 18:03:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-02-23 18:03:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2021-02-23 18:03:55,518 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 91 [2021-02-23 18:03:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:55,518 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2021-02-23 18:03:55,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-02-23 18:03:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2021-02-23 18:03:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-23 18:03:55,520 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:55,521 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] [2021-02-23 18:03:55,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:03:55,521 INFO L428 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:55,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1638781318, now seen corresponding path program 1 times [2021-02-23 18:03:55,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:55,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33771809] [2021-02-23 18:03:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:55,528 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:03:55,566 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:03:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:03:55,605 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:03:55,651 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:03:55,652 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:03:55,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:03:55,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:03:55 BoogieIcfgContainer [2021-02-23 18:03:55,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:03:55,677 INFO L168 Benchmark]: Toolchain (without parser) took 22991.94 ms. Allocated memory was 175.1 MB in the beginning and 413.1 MB in the end (delta: 238.0 MB). Free memory was 150.8 MB in the beginning and 150.1 MB in the end (delta: 749.1 kB). Peak memory consumption was 239.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:55,677 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 175.1 MB. Free memory is still 148.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:03:55,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.35 ms. Allocated memory is still 175.1 MB. Free memory was 149.6 MB in the beginning and 125.3 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:55,678 INFO L168 Benchmark]: Boogie Preprocessor took 130.12 ms. Allocated memory is still 175.1 MB. Free memory was 125.1 MB in the beginning and 157.0 MB in the end (delta: -31.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:55,679 INFO L168 Benchmark]: RCFGBuilder took 1152.18 ms. Allocated memory is still 175.1 MB. Free memory was 157.0 MB in the beginning and 86.3 MB in the end (delta: 70.7 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:55,680 INFO L168 Benchmark]: TraceAbstraction took 20979.58 ms. Allocated memory was 175.1 MB in the beginning and 413.1 MB in the end (delta: 238.0 MB). Free memory was 85.8 MB in the beginning and 150.1 MB in the end (delta: -64.3 MB). Peak memory consumption was 174.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:55,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 175.1 MB. Free memory is still 148.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 714.35 ms. Allocated memory is still 175.1 MB. Free memory was 149.6 MB in the beginning and 125.3 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 130.12 ms. Allocated memory is still 175.1 MB. Free memory was 125.1 MB in the beginning and 157.0 MB in the end (delta: -31.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1152.18 ms. Allocated memory is still 175.1 MB. Free memory was 157.0 MB in the beginning and 86.3 MB in the end (delta: 70.7 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20979.58 ms. Allocated memory was 175.1 MB in the beginning and 413.1 MB in the end (delta: 238.0 MB). Free memory was 85.8 MB in the beginning and 150.1 MB in the end (delta: -64.3 MB). Peak memory consumption was 174.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 15 procedures, 228 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 541 SDtfs, 979 SDslu, 3509 SDs, 0 SdLazy, 8860 SolverSat, 296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred 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...