/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/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:36:55,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:36:55,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:36:56,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:36:56,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:36:56,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:36:56,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:36:56,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:36:56,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:36:56,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:36:56,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:36:56,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:36:56,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:36:56,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:36:56,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:36:56,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:36:56,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:36:56,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:36:56,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:36:56,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:36:56,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:36:56,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:36:56,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:36:56,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:36:56,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:36:56,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:36:56,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:36:56,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:36:56,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:36:56,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:36:56,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:36:56,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:36:56,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:36:56,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:36:56,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:36:56,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:36:56,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:36:56,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:36:56,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:36:56,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:36:56,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:36:56,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:36:56,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:36:56,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:36:56,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:36:56,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:36:56,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:36:56,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:36:56,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:36:56,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:36:56,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:36:56,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:36:56,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:36:56,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:36:56,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:36:56,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:36:56,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:36:56,184 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:36:56,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:36:56,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:36:56,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:36:56,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:36:56,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:36:56,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:36:56,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:36:56,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:36:56,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:36:56,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:36:56,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:36:56,667 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:36:56,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2021-02-21 20:36:56,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4903442/894476adb0284d93895c7acf012b9241/FLAG353209072 [2021-02-21 20:36:57,615 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:36:57,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2021-02-21 20:36:57,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4903442/894476adb0284d93895c7acf012b9241/FLAG353209072 [2021-02-21 20:36:57,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4903442/894476adb0284d93895c7acf012b9241 [2021-02-21 20:36:57,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:36:57,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:36:57,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:36:57,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:36:57,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:36:57,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:36:57" (1/1) ... [2021-02-21 20:36:57,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c004e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:57, skipping insertion in model container [2021-02-21 20:36:57,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:36:57" (1/1) ... [2021-02-21 20:36:57,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:36:57,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:36:58,107 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2021-02-21 20:36:58,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:36:58,328 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:36:58,345 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2021-02-21 20:36:58,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:36:58,464 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:36:58,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58 WrapperNode [2021-02-21 20:36:58,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:36:58,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:36:58,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:36:58,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:36:58,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (1/1) ... [2021-02-21 20:36:58,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:36:58,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:36:58,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:36:58,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:36:58,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (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 [2021-02-21 20:36:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:36:58,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:36:58,743 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:36:58,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 20:36:58,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 20:36:58,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 20:36:58,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-21 20:36:58,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-21 20:36:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-21 20:36:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2021-02-21 20:36:58,746 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2021-02-21 20:36:58,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:36:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:36:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:36:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 20:36:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 20:36:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:36:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:36:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 20:36:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 20:36:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 20:36:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 20:36:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 20:36:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 20:36:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 20:36:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 20:36:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 20:36:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 20:36:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 20:36:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 20:36:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 20:36:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 20:36:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 20:36:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 20:36:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 20:36:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 20:36:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 20:36:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 20:36:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 20:36:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 20:36:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 20:36:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 20:36:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 20:36:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 20:36:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 20:36:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 20:36:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 20:36:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 20:36:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 20:36:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 20:36:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 20:36:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 20:36:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 20:36:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 20:36:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 20:36:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 20:36:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 20:36:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 20:36:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 20:36:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 20:36:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 20:36:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 20:36:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:36:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:36:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 20:36:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:36:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 20:36:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 20:36:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 20:36:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 20:36:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 20:36:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 20:36:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 20:36:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 20:36:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 20:36:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 20:36:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 20:36:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 20:36:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 20:36:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 20:36:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 20:36:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 20:36:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 20:36:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 20:36:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 20:36:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 20:36:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 20:36:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 20:36:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 20:36:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 20:36:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 20:36:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 20:36:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:36:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:36:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:36:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:36:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:36:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:36:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:36:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:36:59,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:36:59,366 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 20:36:59,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:36:59 BoogieIcfgContainer [2021-02-21 20:36:59,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:36:59,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:36:59,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:36:59,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:36:59,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:36:57" (1/3) ... [2021-02-21 20:36:59,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd1661a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:36:59, skipping insertion in model container [2021-02-21 20:36:59,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:58" (2/3) ... [2021-02-21 20:36:59,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd1661a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:36:59, skipping insertion in model container [2021-02-21 20:36:59,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:36:59" (3/3) ... [2021-02-21 20:36:59,379 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2021-02-21 20:36:59,387 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:36:59,393 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:36:59,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:36:59,446 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:36:59,446 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:36:59,446 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:36:59,447 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:36:59,447 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:36:59,447 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:36:59,447 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:36:59,447 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:36:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2021-02-21 20:36:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-21 20:36:59,480 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:59,481 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:36:59,482 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1236516545, now seen corresponding path program 1 times [2021-02-21 20:36:59,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:59,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266294667] [2021-02-21 20:36:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:59,601 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:59,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:59,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:59,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:59,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:59,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:59,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:59,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:59,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:59,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:36:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:00,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:00,034 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:37:00,036 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:37:00,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:00,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:00,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:00,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:00,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:00,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-21 20:37:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:00,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:00,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-02-21 20:37:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:00,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:00,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-21 20:37:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:00,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:00,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:00,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-02-21 20:37:00,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266294667] [2021-02-21 20:37:00,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:00,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:37:00,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019656381] [2021-02-21 20:37:00,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:37:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:37:00,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:37:00,259 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 9 states. [2021-02-21 20:37:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:01,109 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2021-02-21 20:37:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 20:37:01,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2021-02-21 20:37:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:01,123 INFO L225 Difference]: With dead ends: 192 [2021-02-21 20:37:01,123 INFO L226 Difference]: Without dead ends: 96 [2021-02-21 20:37:01,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:37:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-21 20:37:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-02-21 20:37:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-02-21 20:37:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-02-21 20:37:01,192 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 86 [2021-02-21 20:37:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:01,193 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-02-21 20:37:01,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:37:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-02-21 20:37:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-21 20:37:01,197 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:01,198 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:37:01,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:37:01,198 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1097503254, now seen corresponding path program 1 times [2021-02-21 20:37:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496015990] [2021-02-21 20:37:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:01,207 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:37:01,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,387 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:37:01,388 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:37:01,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:01,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:01,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:01,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:01,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:01,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:37:01,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:01,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-02-21 20:37:01,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496015990] [2021-02-21 20:37:01,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:01,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:37:01,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38658156] [2021-02-21 20:37:01,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:37:01,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:01,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:37:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:37:01,506 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 10 states. [2021-02-21 20:37:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:02,296 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2021-02-21 20:37:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:37:02,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2021-02-21 20:37:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:02,301 INFO L225 Difference]: With dead ends: 117 [2021-02-21 20:37:02,301 INFO L226 Difference]: Without dead ends: 94 [2021-02-21 20:37:02,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:37:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-21 20:37:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-02-21 20:37:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-02-21 20:37:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-02-21 20:37:02,331 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 93 [2021-02-21 20:37:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:02,331 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-02-21 20:37:02,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:37:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-02-21 20:37:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-21 20:37:02,333 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:02,334 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:37:02,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:37:02,334 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1922674771, now seen corresponding path program 1 times [2021-02-21 20:37:02,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:02,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532993894] [2021-02-21 20:37:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:02,341 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:37:02,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:02,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:02,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:02,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:02,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:02,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:02,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:02,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 20:37:02,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-02-21 20:37:02,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-02-21 20:37:02,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-02-21 20:37:02,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:02,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-21 20:37:02,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532993894] [2021-02-21 20:37:02,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:02,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:37:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333188992] [2021-02-21 20:37:02,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:37:02,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:37:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:37:02,892 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 14 states. [2021-02-21 20:37:03,628 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-21 20:37:03,781 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-21 20:37:03,944 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-21 20:37:04,080 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-21 20:37:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:04,450 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-02-21 20:37:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-21 20:37:04,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2021-02-21 20:37:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:04,460 INFO L225 Difference]: With dead ends: 104 [2021-02-21 20:37:04,460 INFO L226 Difference]: Without dead ends: 91 [2021-02-21 20:37:04,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-02-21 20:37:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-21 20:37:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-02-21 20:37:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-21 20:37:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-02-21 20:37:04,517 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 95 [2021-02-21 20:37:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:04,518 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-02-21 20:37:04,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:37:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-02-21 20:37:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-02-21 20:37:04,523 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:04,523 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-02-21 20:37:04,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:37:04,524 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:04,526 INFO L82 PathProgramCache]: Analyzing trace with hash -150000509, now seen corresponding path program 1 times [2021-02-21 20:37:04,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:04,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103594535] [2021-02-21 20:37:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:04,534 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:37:04,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:04,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,779 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:37:04,780 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:37:04,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:04,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:04,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:04,875 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-21 20:37:04,876 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-21 20:37:04,891 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-21 20:37:04,892 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-21 20:37:04,909 WARN L141 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size [2021-02-21 20:37:04,910 WARN L147 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size 16 [2021-02-21 20:37:04,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:04,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:04,951 WARN L141 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size [2021-02-21 20:37:04,952 WARN L147 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size 16 [2021-02-21 20:37:04,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:04,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:04,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:05,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:05,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:37:05,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:05,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-21 20:37:05,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103594535] [2021-02-21 20:37:05,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:05,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-21 20:37:05,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162492485] [2021-02-21 20:37:05,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-21 20:37:05,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:05,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-21 20:37:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:37:05,106 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 18 states. [2021-02-21 20:37:06,669 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-21 20:37:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:07,356 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-02-21 20:37:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-21 20:37:07,357 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2021-02-21 20:37:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:07,359 INFO L225 Difference]: With dead ends: 142 [2021-02-21 20:37:07,360 INFO L226 Difference]: Without dead ends: 119 [2021-02-21 20:37:07,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2021-02-21 20:37:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-21 20:37:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2021-02-21 20:37:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-21 20:37:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-02-21 20:37:07,389 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 103 [2021-02-21 20:37:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:07,389 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-02-21 20:37:07,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-21 20:37:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-02-21 20:37:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-02-21 20:37:07,392 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:07,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-02-21 20:37:07,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:37:07,392 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1905603578, now seen corresponding path program 1 times [2021-02-21 20:37:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:07,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110019371] [2021-02-21 20:37:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:07,398 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:07,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:37:07,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 20:37:07,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:07,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:37:07,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:07,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:37:07,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:37:07,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:07,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:07,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:07,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:07,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:07,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:07,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:07,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:07,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:37:07,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:37:07,824 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-21 20:37:07,825 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-21 20:37:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:07,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:37:07,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:07,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 20:37:07,950 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-21 20:37:07,951 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-21 20:37:07,987 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-21 20:37:07,988 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-21 20:37:08,027 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-21 20:37:08,028 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-21 20:37:08,030 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size [2021-02-21 20:37:08,031 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size 33 [2021-02-21 20:37:08,072 WARN L141 QuantifierPusher]: treesize reduction 9, result has 84.2 percent of original size [2021-02-21 20:37:08,074 WARN L147 QuantifierPusher]: treesize reduction 9, result has 84.2 percent of original size 48 [2021-02-21 20:37:08,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:08,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:08,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:08,144 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-21 20:37:08,145 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-21 20:37:08,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:08,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 20:37:08,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:08,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 20:37:08,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:08,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-21 20:37:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-21 20:37:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110019371] [2021-02-21 20:37:08,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:08,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-02-21 20:37:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445193801] [2021-02-21 20:37:08,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-21 20:37:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:08,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-21 20:37:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-02-21 20:37:08,364 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2021-02-21 20:37:10,084 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-21 20:37:10,233 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-02-21 20:37:10,385 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-21 20:37:10,681 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-02-21 20:37:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:11,081 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-02-21 20:37:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-21 20:37:11,082 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 105 [2021-02-21 20:37:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:11,084 INFO L225 Difference]: With dead ends: 123 [2021-02-21 20:37:11,084 INFO L226 Difference]: Without dead ends: 110 [2021-02-21 20:37:11,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=247, Invalid=2203, Unknown=0, NotChecked=0, Total=2450 [2021-02-21 20:37:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-21 20:37:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2021-02-21 20:37:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-21 20:37:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-02-21 20:37:11,114 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 105 [2021-02-21 20:37:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:11,115 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-02-21 20:37:11,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-21 20:37:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-02-21 20:37:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-02-21 20:37:11,117 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:11,117 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-02-21 20:37:11,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:37:11,118 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1705131996, now seen corresponding path program 2 times [2021-02-21 20:37:11,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:11,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521343923] [2021-02-21 20:37:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:11,123 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:37:11,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:37:11,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-21 20:37:11,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,326 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:37:11,327 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:37:11,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:11,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:11,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:11,406 WARN L141 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-02-21 20:37:11,406 WARN L147 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size 12 [2021-02-21 20:37:11,425 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-21 20:37:11,426 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-21 20:37:11,447 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-21 20:37:11,448 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-21 20:37:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:37:11,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 20:37:11,550 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-21 20:37:11,551 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-21 20:37:11,588 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-21 20:37:11,592 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-21 20:37:11,625 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-21 20:37:11,626 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-21 20:37:11,627 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size [2021-02-21 20:37:11,627 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size 33 [2021-02-21 20:37:11,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 20:37:11,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:11,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:11,782 WARN L141 QuantifierPusher]: treesize reduction 10, result has 66.7 percent of original size [2021-02-21 20:37:11,785 WARN L147 QuantifierPusher]: treesize reduction 10, result has 66.7 percent of original size 20 [2021-02-21 20:37:11,843 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-02-21 20:37:11,844 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size 20 [2021-02-21 20:37:11,890 WARN L141 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size [2021-02-21 20:37:11,891 WARN L147 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size 37 [2021-02-21 20:37:11,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:11,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-21 20:37:12,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:12,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-21 20:37:12,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:12,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 20:37:12,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:12,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-21 20:37:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-21 20:37:12,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521343923] [2021-02-21 20:37:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:12,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-02-21 20:37:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825704268] [2021-02-21 20:37:12,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-21 20:37:12,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-21 20:37:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-02-21 20:37:12,193 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 27 states. [2021-02-21 20:37:14,385 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-21 20:37:15,268 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-21 20:37:15,451 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-21 20:37:15,706 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-21 20:37:15,895 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-02-21 20:37:16,070 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-21 20:37:16,258 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-02-21 20:37:16,522 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-21 20:37:16,702 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-21 20:37:16,869 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-21 20:37:17,035 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-21 20:37:17,389 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-21 20:37:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:17,520 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2021-02-21 20:37:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-21 20:37:17,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2021-02-21 20:37:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:17,522 INFO L225 Difference]: With dead ends: 164 [2021-02-21 20:37:17,522 INFO L226 Difference]: Without dead ends: 141 [2021-02-21 20:37:17,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=591, Invalid=3569, Unknown=0, NotChecked=0, Total=4160 [2021-02-21 20:37:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-21 20:37:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-02-21 20:37:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-02-21 20:37:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2021-02-21 20:37:17,554 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 113 [2021-02-21 20:37:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:17,555 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2021-02-21 20:37:17,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-21 20:37:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2021-02-21 20:37:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-02-21 20:37:17,557 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:17,557 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-21 20:37:17,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:37:17,557 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1534694113, now seen corresponding path program 2 times [2021-02-21 20:37:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:17,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992412896] [2021-02-21 20:37:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:17,562 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:17,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:37:17,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 20:37:17,735 WARN L141 QuantifierPusher]: treesize reduction 4, result has 92.6 percent of original size [2021-02-21 20:37:17,736 WARN L147 QuantifierPusher]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-02-21 20:37:17,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:17,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:17,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:17,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:17,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:17,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:17,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:17,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:37:17,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:37:17,894 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-21 20:37:17,895 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-21 20:37:17,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:17,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:17,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:37:18,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-21 20:37:18,032 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-21 20:37:18,032 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-21 20:37:18,061 WARN L141 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size [2021-02-21 20:37:18,061 WARN L147 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size 28 [2021-02-21 20:37:18,092 WARN L141 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size [2021-02-21 20:37:18,093 WARN L147 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size 28 [2021-02-21 20:37:18,095 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size [2021-02-21 20:37:18,096 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size 38 [2021-02-21 20:37:18,133 WARN L141 QuantifierPusher]: treesize reduction 9, result has 85.5 percent of original size [2021-02-21 20:37:18,135 WARN L147 QuantifierPusher]: treesize reduction 9, result has 85.5 percent of original size 53 [2021-02-21 20:37:18,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:18,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 20:37:18,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-21 20:37:18,289 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size [2021-02-21 20:37:18,290 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24 [2021-02-21 20:37:18,337 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size [2021-02-21 20:37:18,338 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size 39 [2021-02-21 20:37:18,392 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size [2021-02-21 20:37:18,393 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size 39 [2021-02-21 20:37:18,394 WARN L141 QuantifierPusher]: treesize reduction 5, result has 90.7 percent of original size [2021-02-21 20:37:18,395 WARN L147 QuantifierPusher]: treesize reduction 5, result has 90.7 percent of original size 49 [2021-02-21 20:37:18,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-02-21 20:37:18,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:18,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:18,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:18,649 WARN L141 QuantifierPusher]: treesize reduction 10, result has 69.7 percent of original size [2021-02-21 20:37:18,650 WARN L147 QuantifierPusher]: treesize reduction 10, result has 69.7 percent of original size 23 [2021-02-21 20:37:18,720 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.0 percent of original size [2021-02-21 20:37:18,735 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.0 percent of original size 30 [2021-02-21 20:37:18,815 WARN L141 QuantifierPusher]: treesize reduction 18, result has 66.0 percent of original size [2021-02-21 20:37:18,819 WARN L147 QuantifierPusher]: treesize reduction 18, result has 66.0 percent of original size 35 [2021-02-21 20:37:18,885 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size [2021-02-21 20:37:18,886 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size 31 [2021-02-21 20:37:18,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:18,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 20:37:19,019 WARN L141 QuantifierPusher]: treesize reduction 45, result has 69.6 percent of original size [2021-02-21 20:37:19,020 WARN L147 QuantifierPusher]: treesize reduction 45, result has 69.6 percent of original size 103 [2021-02-21 20:37:19,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:19,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-21 20:37:19,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:19,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-02-21 20:37:19,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:19,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-02-21 20:37:19,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:19,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 20:37:19,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:19,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 20:37:19,728 WARN L141 QuantifierPusher]: treesize reduction 5, result has 91.4 percent of original size [2021-02-21 20:37:19,729 WARN L147 QuantifierPusher]: treesize reduction 5, result has 91.4 percent of original size 53 [2021-02-21 20:37:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 20:37:19,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992412896] [2021-02-21 20:37:19,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:19,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-02-21 20:37:19,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139344724] [2021-02-21 20:37:19,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-21 20:37:19,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-21 20:37:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-02-21 20:37:19,899 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 37 states. [2021-02-21 20:37:21,188 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-02-21 20:37:22,791 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-02-21 20:37:23,010 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-21 20:37:23,233 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-02-21 20:37:23,497 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2021-02-21 20:37:23,767 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-02-21 20:37:24,039 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-02-21 20:37:24,325 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2021-02-21 20:37:24,586 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-02-21 20:37:24,816 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-02-21 20:37:25,034 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2021-02-21 20:37:25,282 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-02-21 20:37:25,515 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-02-21 20:37:25,834 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-21 20:37:26,188 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2021-02-21 20:37:26,459 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-02-21 20:37:26,717 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-02-21 20:37:27,033 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-02-21 20:37:27,357 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-02-21 20:37:27,689 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-02-21 20:37:27,957 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-02-21 20:37:28,276 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-02-21 20:37:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:28,610 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2021-02-21 20:37:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-21 20:37:28,611 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 115 [2021-02-21 20:37:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:28,612 INFO L225 Difference]: With dead ends: 145 [2021-02-21 20:37:28,612 INFO L226 Difference]: Without dead ends: 132 [2021-02-21 20:37:28,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=703, Invalid=5149, Unknown=0, NotChecked=0, Total=5852 [2021-02-21 20:37:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-21 20:37:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 116. [2021-02-21 20:37:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-02-21 20:37:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2021-02-21 20:37:28,655 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 115 [2021-02-21 20:37:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:28,656 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2021-02-21 20:37:28,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-02-21 20:37:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2021-02-21 20:37:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-02-21 20:37:28,658 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:28,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:37:28,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:37:28,659 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1254377483, now seen corresponding path program 3 times [2021-02-21 20:37:28,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:28,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443962572] [2021-02-21 20:37:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:28,664 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:28,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:28,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:37:28,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:37:28,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-02-21 20:37:28,796 WARN L141 QuantifierPusher]: treesize reduction 29, result has 56.7 percent of original size [2021-02-21 20:37:28,797 WARN L147 QuantifierPusher]: treesize reduction 29, result has 56.7 percent of original size 38 [2021-02-21 20:37:28,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:28,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:37:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:28,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:28,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:37:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:28,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:28,894 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:37:28,894 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:37:28,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:28,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:37:28,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:37:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:28,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:37:28,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:28,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:37:28,984 WARN L141 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-02-21 20:37:28,985 WARN L147 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size 12 [2021-02-21 20:37:29,006 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-21 20:37:29,007 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-21 20:37:29,033 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-21 20:37:29,034 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-21 20:37:29,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 20:37:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:29,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:37:29,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 20:37:29,150 WARN L141 QuantifierPusher]: treesize reduction 5, result has 84.4 percent of original size [2021-02-21 20:37:29,151 WARN L147 QuantifierPusher]: treesize reduction 5, result has 84.4 percent of original size 27 [2021-02-21 20:37:29,186 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size [2021-02-21 20:37:29,187 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size 32 [2021-02-21 20:37:29,227 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size [2021-02-21 20:37:29,229 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size 32 [2021-02-21 20:37:29,231 WARN L141 QuantifierPusher]: treesize reduction 5, result has 89.4 percent of original size [2021-02-21 20:37:29,232 WARN L147 QuantifierPusher]: treesize reduction 5, result has 89.4 percent of original size 42 [2021-02-21 20:37:29,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-02-21 20:37:29,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:37:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:29,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:37:29,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 20:37:29,454 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.8 percent of original size [2021-02-21 20:37:29,455 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.8 percent of original size 21 [2021-02-21 20:37:29,493 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size [2021-02-21 20:37:29,494 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size 31 [2021-02-21 20:37:29,538 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size [2021-02-21 20:37:29,539 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size 31 [2021-02-21 20:37:29,540 WARN L141 QuantifierPusher]: treesize reduction 5, result has 89.1 percent of original size [2021-02-21 20:37:29,541 WARN L147 QuantifierPusher]: treesize reduction 5, result has 89.1 percent of original size 41 [2021-02-21 20:37:29,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-02-21 20:37:29,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 20:37:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:37:29,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:37:29,723 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-21 20:37:29,723 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-21 20:37:29,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 20:37:29,811 WARN L141 QuantifierPusher]: treesize reduction 50, result has 36.7 percent of original size [2021-02-21 20:37:29,812 WARN L147 QuantifierPusher]: treesize reduction 50, result has 36.7 percent of original size 29 [2021-02-21 20:37:29,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:29,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 20:37:29,920 WARN L141 QuantifierPusher]: treesize reduction 16, result has 80.2 percent of original size [2021-02-21 20:37:29,921 WARN L147 QuantifierPusher]: treesize reduction 16, result has 80.2 percent of original size 65 [2021-02-21 20:37:30,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:30,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 20:37:30,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:30,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 20:37:30,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:30,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 20:37:30,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:37:30,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 20:37:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 20:37:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443962572] [2021-02-21 20:37:30,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:37:30,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-02-21 20:37:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539825107] [2021-02-21 20:37:30,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-21 20:37:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:37:30,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-21 20:37:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2021-02-21 20:37:30,428 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 36 states. [2021-02-21 20:37:32,197 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-02-21 20:37:33,040 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-02-21 20:37:33,920 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-21 20:37:34,369 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-21 20:37:34,605 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-02-21 20:37:34,934 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-02-21 20:37:35,168 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-21 20:37:35,385 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-21 20:37:35,626 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-02-21 20:37:35,956 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-02-21 20:37:36,196 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-21 20:37:36,412 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-21 20:37:36,654 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-21 20:37:36,987 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-21 20:37:37,209 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-02-21 20:37:37,408 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-21 20:37:37,635 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-02-21 20:37:38,094 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-21 20:37:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:37:38,246 INFO L93 Difference]: Finished difference Result 177 states and 183 transitions. [2021-02-21 20:37:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-21 20:37:38,247 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 123 [2021-02-21 20:37:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:37:38,249 INFO L225 Difference]: With dead ends: 177 [2021-02-21 20:37:38,249 INFO L226 Difference]: Without dead ends: 154 [2021-02-21 20:37:38,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=845, Invalid=5635, Unknown=0, NotChecked=0, Total=6480 [2021-02-21 20:37:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-21 20:37:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2021-02-21 20:37:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-21 20:37:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-02-21 20:37:38,289 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 123 [2021-02-21 20:37:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:37:38,290 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-02-21 20:37:38,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-02-21 20:37:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-02-21 20:37:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-02-21 20:37:38,291 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:37:38,291 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:37:38,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:37:38,292 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:37:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:37:38,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1940013816, now seen corresponding path program 3 times [2021-02-21 20:37:38,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:37:38,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310674566] [2021-02-21 20:37:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:37:38,297 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:37:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:37:38,340 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:37:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:37:38,394 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:37:38,466 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:37:38,467 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:37:38,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:37:38,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:37:38 BoogieIcfgContainer [2021-02-21 20:37:38,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:37:38,495 INFO L168 Benchmark]: Toolchain (without parser) took 40637.20 ms. Allocated memory was 158.3 MB in the beginning and 335.5 MB in the end (delta: 177.2 MB). Free memory was 132.6 MB in the beginning and 308.8 MB in the end (delta: -176.2 MB). Peak memory consumption was 199.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:37:38,496 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 132.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:37:38,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 592.55 ms. Allocated memory is still 158.3 MB. Free memory was 131.5 MB in the beginning and 109.4 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:37:38,496 INFO L168 Benchmark]: Boogie Preprocessor took 138.63 ms. Allocated memory is still 158.3 MB. Free memory was 109.4 MB in the beginning and 139.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:37:38,496 INFO L168 Benchmark]: RCFGBuilder took 763.32 ms. Allocated memory is still 158.3 MB. Free memory was 139.0 MB in the beginning and 92.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:37:38,497 INFO L168 Benchmark]: TraceAbstraction took 39123.46 ms. Allocated memory was 158.3 MB in the beginning and 335.5 MB in the end (delta: 177.2 MB). Free memory was 92.3 MB in the beginning and 308.8 MB in the end (delta: -216.5 MB). Peak memory consumption was 156.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:37:38,498 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 158.3 MB. Free memory is still 132.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 592.55 ms. Allocated memory is still 158.3 MB. Free memory was 131.5 MB in the beginning and 109.4 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 138.63 ms. Allocated memory is still 158.3 MB. Free memory was 109.4 MB in the beginning and 139.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 763.32 ms. Allocated memory is still 158.3 MB. Free memory was 139.0 MB in the beginning and 92.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 39123.46 ms. Allocated memory was 158.3 MB in the beginning and 335.5 MB in the end (delta: 177.2 MB). Free memory was 92.3 MB in the beginning and 308.8 MB in the end (delta: -216.5 MB). Peak memory consumption was 156.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L533] mlist *head; [L554] int i; [L555] mlist *mylist, *temp; [L556] CALL insert_list(mylist,2) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) [L550] head = l [L551] return 0; [L556] RET insert_list(mylist,2) [L557] CALL insert_list(mylist,5) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L557] RET insert_list(mylist,5) [L558] CALL insert_list(mylist,1) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L558] RET insert_list(mylist,1) [L559] CALL insert_list(mylist,3) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L559] RET insert_list(mylist,3) [L560] CALL, EXPR search_list(head,2) [L535] l = head [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; [L560] RET, EXPR search_list(head,2) [L560] temp = search_list(head,2) [L561] EXPR temp->key [L561] CALL __VERIFIER_assert(temp->key==1) [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 108 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.0s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 30.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 535 SDtfs, 2246 SDslu, 2679 SDs, 0 SdLazy, 9298 SolverSat, 533 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 508 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 25.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 150 StatesRemovedByMinimization, 8 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...