/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 01:02:46,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 01:02:46,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 01:02:46,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 01:02:46,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 01:02:46,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 01:02:46,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 01:02:46,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 01:02:46,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 01:02:46,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 01:02:46,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 01:02:46,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 01:02:46,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 01:02:46,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 01:02:46,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 01:02:46,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 01:02:46,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 01:02:46,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 01:02:46,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 01:02:46,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 01:02:46,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 01:02:46,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 01:02:46,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 01:02:46,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 01:02:46,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 01:02:46,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 01:02:46,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 01:02:46,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 01:02:46,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 01:02:46,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 01:02:46,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 01:02:46,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 01:02:46,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 01:02:46,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 01:02:46,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 01:02:46,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 01:02:46,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 01:02:46,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 01:02:46,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 01:02:46,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 01:02:46,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 01:02:46,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 01:02:46,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 01:02:46,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 01:02:46,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 01:02:46,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 01:02:46,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 01:02:46,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 01:02:46,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 01:02:46,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 01:02:46,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 01:02:46,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 01:02:46,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 01:02:46,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 01:02:46,642 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 01:02:46,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 01:02:46,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 01:02:46,643 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 01:02:46,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 01:02:46,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 01:02:46,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:02:46,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 01:02:46,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 01:02:46,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 01:02:46,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 01:02:47,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 01:02:47,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 01:02:47,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 01:02:47,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 01:02:47,120 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 01:02:47,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-24 01:02:47,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f898497c/a7b5ef46ff4a43888a02b2839ded2445/FLAG6a143de17 [2020-10-24 01:02:47,879 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 01:02:47,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-10-24 01:02:47,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f898497c/a7b5ef46ff4a43888a02b2839ded2445/FLAG6a143de17 [2020-10-24 01:02:48,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f898497c/a7b5ef46ff4a43888a02b2839ded2445 [2020-10-24 01:02:48,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 01:02:48,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 01:02:48,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 01:02:48,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 01:02:48,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 01:02:48,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3377e866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48, skipping insertion in model container [2020-10-24 01:02:48,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 01:02:48,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 01:02:48,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:02:48,712 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 01:02:48,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:02:48,873 INFO L208 MainTranslator]: Completed translation [2020-10-24 01:02:48,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48 WrapperNode [2020-10-24 01:02:48,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 01:02:48,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 01:02:48,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 01:02:48,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 01:02:48,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... [2020-10-24 01:02:48,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 01:02:48,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 01:02:48,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 01:02:48,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 01:02:48,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:02:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 01:02:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 01:02:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 01:02:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-24 01:02:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-24 01:02:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-24 01:02:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-24 01:02:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-24 01:02:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-24 01:02:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 01:02:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 01:02:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 01:02:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 01:02:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 01:02:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 01:02:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 01:02:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 01:02:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-24 01:02:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-24 01:02:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-24 01:02:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-24 01:02:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-24 01:02:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-24 01:02:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-24 01:02:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-24 01:02:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-24 01:02:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-24 01:02:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-24 01:02:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-24 01:02:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-24 01:02:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-24 01:02:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-24 01:02:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-24 01:02:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-24 01:02:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-24 01:02:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-24 01:02:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-24 01:02:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-24 01:02:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-24 01:02:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-24 01:02:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-24 01:02:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-24 01:02:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-24 01:02:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-24 01:02:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-24 01:02:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-24 01:02:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-24 01:02:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-24 01:02:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 01:02:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-24 01:02:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-24 01:02:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-24 01:02:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-24 01:02:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-24 01:02:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-24 01:02:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-24 01:02:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-24 01:02:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-24 01:02:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-24 01:02:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-24 01:02:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-24 01:02:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-24 01:02:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-24 01:02:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-24 01:02:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-24 01:02:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-24 01:02:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-24 01:02:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-24 01:02:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-24 01:02:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-24 01:02:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-24 01:02:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 01:02:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 01:02:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 01:02:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 01:02:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 01:02:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 01:02:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 01:02:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 01:02:49,444 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-24 01:02:49,655 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 01:02:49,655 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-24 01:02:49,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:02:49 BoogieIcfgContainer [2020-10-24 01:02:49,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 01:02:49,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 01:02:49,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 01:02:49,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 01:02:49,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:02:48" (1/3) ... [2020-10-24 01:02:49,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c28ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:02:49, skipping insertion in model container [2020-10-24 01:02:49,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:02:48" (2/3) ... [2020-10-24 01:02:49,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c28ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:02:49, skipping insertion in model container [2020-10-24 01:02:49,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:02:49" (3/3) ... [2020-10-24 01:02:49,668 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-24 01:02:49,682 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 01:02:49,689 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 01:02:49,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 01:02:49,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 01:02:49,732 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 01:02:49,732 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 01:02:49,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 01:02:49,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 01:02:49,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 01:02:49,733 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 01:02:49,733 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 01:02:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-10-24 01:02:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-24 01:02:49,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:49,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:02:49,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:49,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2107792998, now seen corresponding path program 1 times [2020-10-24 01:02:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:49,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206542360] [2020-10-24 01:02:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:50,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:50,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206542360] [2020-10-24 01:02:50,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:02:50,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 01:02:50,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292323012] [2020-10-24 01:02:50,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 01:02:50,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 01:02:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 01:02:50,161 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 3 states. [2020-10-24 01:02:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:50,479 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-10-24 01:02:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 01:02:50,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-24 01:02:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:50,499 INFO L225 Difference]: With dead ends: 122 [2020-10-24 01:02:50,499 INFO L226 Difference]: Without dead ends: 63 [2020-10-24 01:02:50,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 01:02:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-24 01:02:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-24 01:02:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 01:02:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-24 01:02:50,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 28 [2020-10-24 01:02:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:50,596 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-24 01:02:50,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 01:02:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-24 01:02:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 01:02:50,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:50,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:02:50,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 01:02:50,600 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash 166627174, now seen corresponding path program 1 times [2020-10-24 01:02:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:50,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89377832] [2020-10-24 01:02:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:50,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:50,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89377832] [2020-10-24 01:02:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:02:50,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 01:02:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858288349] [2020-10-24 01:02:50,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:02:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:02:50,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:02:50,854 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 7 states. [2020-10-24 01:02:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:51,223 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-24 01:02:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 01:02:51,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-24 01:02:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:51,228 INFO L225 Difference]: With dead ends: 140 [2020-10-24 01:02:51,228 INFO L226 Difference]: Without dead ends: 132 [2020-10-24 01:02:51,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:02:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-24 01:02:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-10-24 01:02:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-24 01:02:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-24 01:02:51,248 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 36 [2020-10-24 01:02:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:51,249 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-24 01:02:51,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:02:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-24 01:02:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 01:02:51,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:51,251 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:51,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 01:02:51,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1766737650, now seen corresponding path program 1 times [2020-10-24 01:02:51,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:51,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601231177] [2020-10-24 01:02:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:51,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601231177] [2020-10-24 01:02:51,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:02:51,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 01:02:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466550146] [2020-10-24 01:02:51,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:02:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:02:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:02:51,376 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 7 states. [2020-10-24 01:02:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:51,674 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-10-24 01:02:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 01:02:51,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-24 01:02:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:51,677 INFO L225 Difference]: With dead ends: 143 [2020-10-24 01:02:51,678 INFO L226 Difference]: Without dead ends: 122 [2020-10-24 01:02:51,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:02:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-24 01:02:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-10-24 01:02:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-24 01:02:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-24 01:02:51,705 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 42 [2020-10-24 01:02:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:51,705 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-24 01:02:51,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:02:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-24 01:02:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 01:02:51,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:51,710 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:51,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 01:02:51,711 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1585511714, now seen corresponding path program 1 times [2020-10-24 01:02:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:51,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712087028] [2020-10-24 01:02:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:51,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712087028] [2020-10-24 01:02:51,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:02:51,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 01:02:51,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907525070] [2020-10-24 01:02:51,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:02:51,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:51,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:02:51,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:02:51,898 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 7 states. [2020-10-24 01:02:52,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:52,137 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-10-24 01:02:52,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 01:02:52,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-24 01:02:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:52,139 INFO L225 Difference]: With dead ends: 122 [2020-10-24 01:02:52,139 INFO L226 Difference]: Without dead ends: 100 [2020-10-24 01:02:52,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:02:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-24 01:02:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2020-10-24 01:02:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-24 01:02:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-24 01:02:52,149 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 42 [2020-10-24 01:02:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:52,149 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-24 01:02:52,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:02:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-24 01:02:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 01:02:52,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:52,151 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:52,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 01:02:52,152 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1457672738, now seen corresponding path program 1 times [2020-10-24 01:02:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:52,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097086067] [2020-10-24 01:02:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:52,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:52,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097086067] [2020-10-24 01:02:52,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:02:52,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 01:02:52,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301621949] [2020-10-24 01:02:52,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 01:02:52,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 01:02:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-24 01:02:52,459 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-10-24 01:02:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:53,389 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2020-10-24 01:02:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 01:02:53,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-24 01:02:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:53,392 INFO L225 Difference]: With dead ends: 163 [2020-10-24 01:02:53,392 INFO L226 Difference]: Without dead ends: 148 [2020-10-24 01:02:53,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-10-24 01:02:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-24 01:02:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 84. [2020-10-24 01:02:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 01:02:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-24 01:02:53,410 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 47 [2020-10-24 01:02:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:53,411 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-24 01:02:53,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 01:02:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-24 01:02:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 01:02:53,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:53,413 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:53,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 01:02:53,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash -213825236, now seen corresponding path program 1 times [2020-10-24 01:02:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:53,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24895941] [2020-10-24 01:02:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:53,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24895941] [2020-10-24 01:02:53,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:02:53,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 01:02:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932072601] [2020-10-24 01:02:53,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 01:02:53,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 01:02:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-24 01:02:53,740 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-10-24 01:02:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:54,971 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2020-10-24 01:02:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 01:02:54,972 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-24 01:02:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:54,975 INFO L225 Difference]: With dead ends: 187 [2020-10-24 01:02:54,975 INFO L226 Difference]: Without dead ends: 179 [2020-10-24 01:02:54,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-10-24 01:02:54,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-24 01:02:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 106. [2020-10-24 01:02:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-24 01:02:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-10-24 01:02:55,008 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 47 [2020-10-24 01:02:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:55,008 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-10-24 01:02:55,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 01:02:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-10-24 01:02:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 01:02:55,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:55,018 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:55,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 01:02:55,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:55,024 INFO L82 PathProgramCache]: Analyzing trace with hash -816306810, now seen corresponding path program 1 times [2020-10-24 01:02:55,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:55,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627692947] [2020-10-24 01:02:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:55,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:55,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627692947] [2020-10-24 01:02:55,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:02:55,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 01:02:55,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235770897] [2020-10-24 01:02:55,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:02:55,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:55,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:02:55,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:02:55,567 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 16 states. [2020-10-24 01:02:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:57,089 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2020-10-24 01:02:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 01:02:57,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-24 01:02:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:57,091 INFO L225 Difference]: With dead ends: 171 [2020-10-24 01:02:57,091 INFO L226 Difference]: Without dead ends: 163 [2020-10-24 01:02:57,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-10-24 01:02:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-24 01:02:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2020-10-24 01:02:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-24 01:02:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-10-24 01:02:57,140 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 53 [2020-10-24 01:02:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:57,140 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-10-24 01:02:57,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:02:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-10-24 01:02:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 01:02:57,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:57,142 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 01:02:57,143 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash 927043156, now seen corresponding path program 1 times [2020-10-24 01:02:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:57,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588067740] [2020-10-24 01:02:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:57,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:57,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588067740] [2020-10-24 01:02:57,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:02:57,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 01:02:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894714020] [2020-10-24 01:02:57,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 01:02:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 01:02:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-24 01:02:57,416 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 15 states. [2020-10-24 01:02:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:02:58,378 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2020-10-24 01:02:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 01:02:58,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-24 01:02:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:02:58,381 INFO L225 Difference]: With dead ends: 199 [2020-10-24 01:02:58,382 INFO L226 Difference]: Without dead ends: 178 [2020-10-24 01:02:58,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-10-24 01:02:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-24 01:02:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 112. [2020-10-24 01:02:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-24 01:02:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-10-24 01:02:58,419 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 53 [2020-10-24 01:02:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:02:58,420 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-10-24 01:02:58,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 01:02:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-10-24 01:02:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 01:02:58,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:02:58,425 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:02:58,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 01:02:58,425 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:02:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:02:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1108269092, now seen corresponding path program 1 times [2020-10-24 01:02:58,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:02:58,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756569467] [2020-10-24 01:02:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:02:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:02:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:02:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:02:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756569467] [2020-10-24 01:02:58,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:02:58,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 01:02:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543614795] [2020-10-24 01:02:58,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:02:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:02:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:02:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:02:58,896 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 16 states. [2020-10-24 01:03:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:00,280 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-10-24 01:03:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 01:03:00,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-24 01:03:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:00,283 INFO L225 Difference]: With dead ends: 175 [2020-10-24 01:03:00,283 INFO L226 Difference]: Without dead ends: 167 [2020-10-24 01:03:00,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-10-24 01:03:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-24 01:03:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2020-10-24 01:03:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-24 01:03:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-24 01:03:00,309 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 53 [2020-10-24 01:03:00,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:00,311 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-24 01:03:00,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:03:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-24 01:03:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 01:03:00,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:00,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:03:00,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 01:03:00,313 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:00,314 INFO L82 PathProgramCache]: Analyzing trace with hash 6311014, now seen corresponding path program 2 times [2020-10-24 01:03:00,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:00,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861768136] [2020-10-24 01:03:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:00,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:00,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861768136] [2020-10-24 01:03:00,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:00,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 01:03:00,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795910530] [2020-10-24 01:03:00,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 01:03:00,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:00,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 01:03:00,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-24 01:03:00,944 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 22 states. [2020-10-24 01:03:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:03,114 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2020-10-24 01:03:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-24 01:03:03,115 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-24 01:03:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:03,117 INFO L225 Difference]: With dead ends: 207 [2020-10-24 01:03:03,117 INFO L226 Difference]: Without dead ends: 199 [2020-10-24 01:03:03,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 01:03:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-24 01:03:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2020-10-24 01:03:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-24 01:03:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-24 01:03:03,148 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 58 [2020-10-24 01:03:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:03,149 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-24 01:03:03,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 01:03:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-24 01:03:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 01:03:03,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:03,150 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:03:03,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 01:03:03,151 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash -107072424, now seen corresponding path program 1 times [2020-10-24 01:03:03,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:03,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674087981] [2020-10-24 01:03:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:03,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674087981] [2020-10-24 01:03:03,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:03,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 01:03:03,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406109595] [2020-10-24 01:03:03,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 01:03:03,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 01:03:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-24 01:03:03,744 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 22 states. [2020-10-24 01:03:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:06,137 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2020-10-24 01:03:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 01:03:06,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-24 01:03:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:06,140 INFO L225 Difference]: With dead ends: 244 [2020-10-24 01:03:06,140 INFO L226 Difference]: Without dead ends: 236 [2020-10-24 01:03:06,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 01:03:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-24 01:03:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 156. [2020-10-24 01:03:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-24 01:03:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-10-24 01:03:06,166 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 58 [2020-10-24 01:03:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:06,166 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-10-24 01:03:06,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 01:03:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-10-24 01:03:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 01:03:06,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:06,168 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:03:06,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 01:03:06,168 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1632354514, now seen corresponding path program 2 times [2020-10-24 01:03:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:06,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246253992] [2020-10-24 01:03:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:06,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246253992] [2020-10-24 01:03:06,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:06,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 01:03:06,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569701122] [2020-10-24 01:03:06,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:03:06,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:06,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:03:06,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:03:06,517 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 16 states. [2020-10-24 01:03:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:07,779 INFO L93 Difference]: Finished difference Result 214 states and 230 transitions. [2020-10-24 01:03:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 01:03:07,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-24 01:03:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:07,787 INFO L225 Difference]: With dead ends: 214 [2020-10-24 01:03:07,788 INFO L226 Difference]: Without dead ends: 193 [2020-10-24 01:03:07,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-10-24 01:03:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-24 01:03:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2020-10-24 01:03:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 01:03:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-10-24 01:03:07,820 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 59 [2020-10-24 01:03:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:07,820 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-10-24 01:03:07,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:03:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-10-24 01:03:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 01:03:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:07,824 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:03:07,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 01:03:07,824 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1451128578, now seen corresponding path program 1 times [2020-10-24 01:03:07,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:07,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873712031] [2020-10-24 01:03:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:08,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:08,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873712031] [2020-10-24 01:03:08,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:08,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 01:03:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103171781] [2020-10-24 01:03:08,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:03:08,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:03:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:03:08,201 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 16 states. [2020-10-24 01:03:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:09,361 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2020-10-24 01:03:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 01:03:09,362 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-24 01:03:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:09,364 INFO L225 Difference]: With dead ends: 193 [2020-10-24 01:03:09,364 INFO L226 Difference]: Without dead ends: 165 [2020-10-24 01:03:09,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-10-24 01:03:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-24 01:03:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2020-10-24 01:03:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-24 01:03:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-10-24 01:03:09,389 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 59 [2020-10-24 01:03:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:09,389 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-10-24 01:03:09,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:03:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-10-24 01:03:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 01:03:09,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:09,390 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:03:09,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 01:03:09,391 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1996705052, now seen corresponding path program 2 times [2020-10-24 01:03:09,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:09,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523939714] [2020-10-24 01:03:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:09,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523939714] [2020-10-24 01:03:09,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:09,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 01:03:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250622962] [2020-10-24 01:03:09,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:03:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:03:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:03:09,770 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-10-24 01:03:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:10,987 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-10-24 01:03:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 01:03:10,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-24 01:03:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:10,990 INFO L225 Difference]: With dead ends: 187 [2020-10-24 01:03:10,990 INFO L226 Difference]: Without dead ends: 159 [2020-10-24 01:03:10,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-10-24 01:03:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-24 01:03:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2020-10-24 01:03:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-24 01:03:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2020-10-24 01:03:11,022 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 59 [2020-10-24 01:03:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:11,023 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2020-10-24 01:03:11,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:03:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2020-10-24 01:03:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:03:11,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:11,024 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:03:11,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 01:03:11,025 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1610333710, now seen corresponding path program 3 times [2020-10-24 01:03:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:11,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575913226] [2020-10-24 01:03:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:11,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575913226] [2020-10-24 01:03:11,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:11,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 01:03:11,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075872482] [2020-10-24 01:03:11,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 01:03:11,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:11,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 01:03:11,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-24 01:03:11,845 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 24 states. [2020-10-24 01:03:13,301 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-24 01:03:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:15,042 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-10-24 01:03:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 01:03:15,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-10-24 01:03:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:15,045 INFO L225 Difference]: With dead ends: 210 [2020-10-24 01:03:15,045 INFO L226 Difference]: Without dead ends: 195 [2020-10-24 01:03:15,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 01:03:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-24 01:03:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 146. [2020-10-24 01:03:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-24 01:03:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2020-10-24 01:03:15,080 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 64 [2020-10-24 01:03:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:15,081 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2020-10-24 01:03:15,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 01:03:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2020-10-24 01:03:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:03:15,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:15,082 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:03:15,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 01:03:15,082 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1791559646, now seen corresponding path program 1 times [2020-10-24 01:03:15,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:15,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705126648] [2020-10-24 01:03:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:15,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:15,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705126648] [2020-10-24 01:03:15,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:15,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 01:03:15,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548720116] [2020-10-24 01:03:15,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 01:03:15,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 01:03:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-24 01:03:15,654 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand 22 states. [2020-10-24 01:03:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:17,793 INFO L93 Difference]: Finished difference Result 222 states and 238 transitions. [2020-10-24 01:03:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 01:03:17,793 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-24 01:03:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:17,795 INFO L225 Difference]: With dead ends: 222 [2020-10-24 01:03:17,796 INFO L226 Difference]: Without dead ends: 205 [2020-10-24 01:03:17,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 01:03:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-24 01:03:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-10-24 01:03:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-24 01:03:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-10-24 01:03:17,825 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 64 [2020-10-24 01:03:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:17,825 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-10-24 01:03:17,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 01:03:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-10-24 01:03:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:03:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:17,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:03:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 01:03:17,827 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2022992000, now seen corresponding path program 1 times [2020-10-24 01:03:17,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:17,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476842259] [2020-10-24 01:03:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:18,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:03:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:03:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:03:18,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476842259] [2020-10-24 01:03:18,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:03:18,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 01:03:18,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037718793] [2020-10-24 01:03:18,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 01:03:18,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:03:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 01:03:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-24 01:03:18,501 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 20 states. [2020-10-24 01:03:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:03:20,152 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2020-10-24 01:03:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 01:03:20,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-24 01:03:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:03:20,155 INFO L225 Difference]: With dead ends: 227 [2020-10-24 01:03:20,156 INFO L226 Difference]: Without dead ends: 206 [2020-10-24 01:03:20,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 01:03:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-24 01:03:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2020-10-24 01:03:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-24 01:03:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-24 01:03:20,197 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 64 [2020-10-24 01:03:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:03:20,198 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-24 01:03:20,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 01:03:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-24 01:03:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:03:20,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:03:20,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:03:20,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 01:03:20,199 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:03:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:03:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2090749360, now seen corresponding path program 1 times [2020-10-24 01:03:20,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:03:20,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416821785] [2020-10-24 01:03:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:03:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:03:20,220 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:03:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:03:20,239 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:03:20,283 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 01:03:20,284 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 01:03:20,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 01:03:20,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:03:20 BoogieIcfgContainer [2020-10-24 01:03:20,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 01:03:20,346 INFO L168 Benchmark]: Toolchain (without parser) took 32191.05 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 132.0 MB in the beginning and 289.6 MB in the end (delta: -157.6 MB). Peak memory consumption was 68.8 MB. Max. memory is 8.0 GB. [2020-10-24 01:03:20,347 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:03:20,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.43 ms. Allocated memory is still 151.0 MB. Free memory was 131.5 MB in the beginning and 123.8 MB in the end (delta: 7.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-24 01:03:20,348 INFO L168 Benchmark]: Boogie Preprocessor took 65.55 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 121.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-24 01:03:20,349 INFO L168 Benchmark]: RCFGBuilder took 716.80 ms. Allocated memory is still 151.0 MB. Free memory was 121.0 MB in the beginning and 127.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 44.3 MB. Max. memory is 8.0 GB. [2020-10-24 01:03:20,350 INFO L168 Benchmark]: TraceAbstraction took 30684.13 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.9 MB in the beginning and 289.6 MB in the end (delta: -162.7 MB). Peak memory consumption was 63.8 MB. Max. memory is 8.0 GB. [2020-10-24 01:03:20,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 707.43 ms. Allocated memory is still 151.0 MB. Free memory was 131.5 MB in the beginning and 123.8 MB in the end (delta: 7.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.55 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 121.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 716.80 ms. Allocated memory is still 151.0 MB. Free memory was 121.0 MB in the beginning and 127.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 44.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30684.13 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.9 MB in the beginning and 289.6 MB in the end (delta: -162.7 MB). Peak memory consumption was 63.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L533] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L534] List t; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L535] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L536] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L537] p->h = 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L538] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L539] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L540] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L541] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L541] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L543] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L544] p->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L545] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L546] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L547] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L548] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-3:0}, t={-3:0}] [L548] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, p->n={-3:0}, t={-3:0}] [L543] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, t={-3:0}] [L550] p->h = 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, t={-3:0}] [L551] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-3:0}] [L552] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L552] COND FALSE !(p->h == 2) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] COND TRUE p->h == 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L555] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-3:0}] [L555] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-3:0}] [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L554] COND FALSE !(p->h == 1) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] COND TRUE p->h != 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L557] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 101 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.5s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 22.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1082 SDtfs, 4338 SDslu, 8617 SDs, 0 SdLazy, 8252 SolverSat, 776 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 16.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 790 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 950 NumberOfCodeBlocks, 950 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 869 ConstructedInterpolants, 0 QuantifiedInterpolants, 437269 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 28/109 InterpolantCoveringCapability, 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...