/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 0.2.0-7d8eed3 [2020-11-07 05:14:56,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:14:56,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:14:56,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:14:56,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:14:56,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:14:56,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:14:56,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:14:56,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:14:56,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:14:56,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:14:56,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:14:56,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:14:56,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:14:56,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:14:56,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:14:56,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:14:56,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:14:56,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:14:56,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:14:56,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:14:56,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:14:56,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:14:56,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:14:56,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 05:14:56,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 05:14:56,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 05:14:56,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 05:14:56,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 05:14:56,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 05:14:56,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 05:14:56,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 05:14:56,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 05:14:56,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 05:14:56,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 05:14:56,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 05:14:56,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 05:14:56,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 05:14:56,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:14:56,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:14:56,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:14:56,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:14:56,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:14:56,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:14:56,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:14:56,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:14:56,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:14:56,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:14:56,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:14:56,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:14:56,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:14:56,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:14:56,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:14:56,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:14:56,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:14:56,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:14:56,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:14:56,521 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:14:56,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:14:56,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:14:56,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:14:56,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:14:56,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:14:56,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:14:56,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:14:56,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:14:56,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:14:56,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:14:56,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:14:56,995 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:14:56,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-11-07 05:14:57,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc82fdfa9/5064a9d3c70b4678aafea0a15ff6ae2d/FLAGf6bf1ebbc [2020-11-07 05:14:57,755 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:14:57,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-11-07 05:14:57,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc82fdfa9/5064a9d3c70b4678aafea0a15ff6ae2d/FLAGf6bf1ebbc [2020-11-07 05:14:58,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc82fdfa9/5064a9d3c70b4678aafea0a15ff6ae2d [2020-11-07 05:14:58,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:14:58,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:14:58,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:14:58,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:14:58,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:14:58,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e01462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58, skipping insertion in model container [2020-11-07 05:14:58,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:14:58,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:14:58,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:14:58,611 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:14:58,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:14:58,741 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:14:58,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58 WrapperNode [2020-11-07 05:14:58,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:14:58,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:14:58,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:14:58,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:14:58,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... [2020-11-07 05:14:58,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:14:58,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:14:58,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:14:58,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:14:58,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:14:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:14:58,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:14:58,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:14:58,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-07 05:14:58,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-07 05:14:58,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-07 05:14:58,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-07 05:14:58,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-07 05:14:58,940 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-07 05:14:58,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:14:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:14:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:14:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 05:14:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 05:14:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:14:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:14:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:14:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 05:14:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 05:14:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 05:14:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 05:14:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 05:14:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 05:14:58,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 05:14:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 05:14:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 05:14:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 05:14:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-07 05:14:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-07 05:14:58,949 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 05:14:58,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 05:14:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 05:14:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 05:14:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 05:14:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 05:14:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 05:14:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 05:14:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 05:14:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 05:14:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 05:14:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 05:14:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 05:14:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 05:14:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 05:14:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 05:14:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 05:14:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 05:14:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 05:14:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 05:14:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 05:14:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 05:14:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 05:14:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 05:14:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 05:14:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 05:14:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 05:14:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 05:14:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 05:14:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 05:14:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 05:14:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 05:14:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 05:14:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 05:14:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 05:14:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 05:14:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 05:14:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 05:14:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 05:14:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 05:14:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 05:14:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 05:14:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 05:14:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 05:14:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 05:14:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 05:14:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 05:14:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 05:14:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 05:14:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 05:14:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 05:14:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 05:14:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 05:14:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 05:14:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 05:14:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 05:14:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 05:14:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 05:14:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 05:14:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 05:14:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 05:14:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 05:14:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 05:14:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 05:14:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-07 05:14:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:14:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:14:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:14:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:14:59,406 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-07 05:14:59,730 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:14:59,731 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-07 05:14:59,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:14:59 BoogieIcfgContainer [2020-11-07 05:14:59,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:14:59,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:14:59,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:14:59,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:14:59,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:14:58" (1/3) ... [2020-11-07 05:14:59,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658890b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:14:59, skipping insertion in model container [2020-11-07 05:14:59,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:58" (2/3) ... [2020-11-07 05:14:59,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658890b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:14:59, skipping insertion in model container [2020-11-07 05:14:59,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:14:59" (3/3) ... [2020-11-07 05:14:59,755 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-11-07 05:14:59,775 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:14:59,779 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:14:59,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:14:59,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:14:59,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:14:59,847 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:14:59,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:14:59,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:14:59,848 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:14:59,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:14:59,848 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:14:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-11-07 05:14:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 05:14:59,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:59,887 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] [2020-11-07 05:14:59,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2107792998, now seen corresponding path program 1 times [2020-11-07 05:14:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:59,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773908127] [2020-11-07 05:14:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:00,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:00,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773908127] [2020-11-07 05:15:00,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:15:00,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 05:15:00,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533426230] [2020-11-07 05:15:00,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 05:15:00,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 05:15:00,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 05:15:00,204 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 3 states. [2020-11-07 05:15:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:00,488 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-11-07 05:15:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 05:15:00,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-07 05:15:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:00,499 INFO L225 Difference]: With dead ends: 122 [2020-11-07 05:15:00,499 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 05:15:00,502 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 [2020-11-07 05:15:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 05:15:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-07 05:15:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 05:15:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-11-07 05:15:00,550 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 28 [2020-11-07 05:15:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:00,550 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-11-07 05:15:00,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 05:15:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-11-07 05:15:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 05:15:00,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:00,553 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] [2020-11-07 05:15:00,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:15:00,553 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash 166627174, now seen corresponding path program 1 times [2020-11-07 05:15:00,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:00,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375563637] [2020-11-07 05:15:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:00,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375563637] [2020-11-07 05:15:00,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:15:00,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 05:15:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288312589] [2020-11-07 05:15:00,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:15:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:00,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:15:00,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:15:00,813 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 7 states. [2020-11-07 05:15:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:01,237 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-11-07 05:15:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 05:15:01,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-11-07 05:15:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:01,242 INFO L225 Difference]: With dead ends: 140 [2020-11-07 05:15:01,242 INFO L226 Difference]: Without dead ends: 132 [2020-11-07 05:15:01,243 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 [2020-11-07 05:15:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-07 05:15:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-11-07 05:15:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 05:15:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-11-07 05:15:01,262 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 36 [2020-11-07 05:15:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:01,263 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-11-07 05:15:01,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:15:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-11-07 05:15:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 05:15:01,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:01,265 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] [2020-11-07 05:15:01,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:15:01,265 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:01,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1766737650, now seen corresponding path program 1 times [2020-11-07 05:15:01,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:01,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062509637] [2020-11-07 05:15:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:01,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:01,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062509637] [2020-11-07 05:15:01,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:15:01,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 05:15:01,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020446174] [2020-11-07 05:15:01,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:15:01,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:15:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:15:01,412 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 7 states. [2020-11-07 05:15:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:01,719 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-11-07 05:15:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 05:15:01,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 05:15:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:01,721 INFO L225 Difference]: With dead ends: 143 [2020-11-07 05:15:01,722 INFO L226 Difference]: Without dead ends: 122 [2020-11-07 05:15:01,722 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 [2020-11-07 05:15:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-07 05:15:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-11-07 05:15:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 05:15:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-11-07 05:15:01,734 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 42 [2020-11-07 05:15:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:01,734 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-11-07 05:15:01,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:15:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-11-07 05:15:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 05:15:01,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:01,736 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] [2020-11-07 05:15:01,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:15:01,736 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1585511714, now seen corresponding path program 1 times [2020-11-07 05:15:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:01,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273282094] [2020-11-07 05:15:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:01,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:01,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273282094] [2020-11-07 05:15:01,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:15:01,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 05:15:01,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139153190] [2020-11-07 05:15:01,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:15:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:15:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:15:01,901 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 7 states. [2020-11-07 05:15:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:02,166 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-11-07 05:15:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:15:02,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 05:15:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:02,168 INFO L225 Difference]: With dead ends: 122 [2020-11-07 05:15:02,169 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 05:15:02,171 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 [2020-11-07 05:15:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 05:15:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2020-11-07 05:15:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 05:15:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-11-07 05:15:02,190 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 42 [2020-11-07 05:15:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:02,191 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-11-07 05:15:02,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:15:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-11-07 05:15:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 05:15:02,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:02,195 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] [2020-11-07 05:15:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:15:02,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1457672738, now seen corresponding path program 1 times [2020-11-07 05:15:02,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:02,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279396803] [2020-11-07 05:15:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:02,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:02,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279396803] [2020-11-07 05:15:02,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:02,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 05:15:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903106258] [2020-11-07 05:15:02,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 05:15:02,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 05:15:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:15:02,583 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-11-07 05:15:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:03,440 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2020-11-07 05:15:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 05:15:03,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-11-07 05:15:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:03,444 INFO L225 Difference]: With dead ends: 163 [2020-11-07 05:15:03,444 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 05:15:03,445 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 [2020-11-07 05:15:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 05:15:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 84. [2020-11-07 05:15:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 05:15:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-11-07 05:15:03,461 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 47 [2020-11-07 05:15:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:03,461 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-11-07 05:15:03,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 05:15:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-11-07 05:15:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 05:15:03,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:03,463 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] [2020-11-07 05:15:03,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 05:15:03,463 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash -213825236, now seen corresponding path program 1 times [2020-11-07 05:15:03,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:03,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76803641] [2020-11-07 05:15:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:03,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:03,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76803641] [2020-11-07 05:15:03,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:03,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 05:15:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510680155] [2020-11-07 05:15:03,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 05:15:03,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 05:15:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:15:03,743 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-11-07 05:15:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:04,844 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2020-11-07 05:15:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 05:15:04,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-11-07 05:15:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:04,846 INFO L225 Difference]: With dead ends: 187 [2020-11-07 05:15:04,846 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 05:15:04,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-11-07 05:15:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 05:15:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 106. [2020-11-07 05:15:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 05:15:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-11-07 05:15:04,894 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 47 [2020-11-07 05:15:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:04,895 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-11-07 05:15:04,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 05:15:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-11-07 05:15:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 05:15:04,900 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:04,901 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] [2020-11-07 05:15:04,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 05:15:04,901 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash -816306810, now seen corresponding path program 1 times [2020-11-07 05:15:04,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:04,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938173482] [2020-11-07 05:15:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:05,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:05,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938173482] [2020-11-07 05:15:05,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:05,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 05:15:05,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645115512] [2020-11-07 05:15:05,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 05:15:05,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 05:15:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:15:05,317 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 16 states. [2020-11-07 05:15:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:06,587 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2020-11-07 05:15:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 05:15:06,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-11-07 05:15:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:06,589 INFO L225 Difference]: With dead ends: 171 [2020-11-07 05:15:06,589 INFO L226 Difference]: Without dead ends: 163 [2020-11-07 05:15:06,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-11-07 05:15:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-07 05:15:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2020-11-07 05:15:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-07 05:15:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-11-07 05:15:06,615 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 53 [2020-11-07 05:15:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:06,616 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-11-07 05:15:06,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 05:15:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-11-07 05:15:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 05:15:06,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:06,618 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] [2020-11-07 05:15:06,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 05:15:06,618 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash 927043156, now seen corresponding path program 1 times [2020-11-07 05:15:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:06,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739640168] [2020-11-07 05:15:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:06,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739640168] [2020-11-07 05:15:06,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:06,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 05:15:06,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347699540] [2020-11-07 05:15:06,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 05:15:06,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:06,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 05:15:06,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:15:06,886 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 15 states. [2020-11-07 05:15:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:07,718 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2020-11-07 05:15:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 05:15:07,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-11-07 05:15:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:07,721 INFO L225 Difference]: With dead ends: 199 [2020-11-07 05:15:07,721 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 05:15:07,723 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 [2020-11-07 05:15:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 05:15:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 112. [2020-11-07 05:15:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-07 05:15:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-11-07 05:15:07,745 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 53 [2020-11-07 05:15:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:07,745 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-11-07 05:15:07,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 05:15:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-11-07 05:15:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 05:15:07,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:07,747 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] [2020-11-07 05:15:07,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 05:15:07,747 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1108269092, now seen corresponding path program 1 times [2020-11-07 05:15:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:07,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676924905] [2020-11-07 05:15:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:08,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:08,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676924905] [2020-11-07 05:15:08,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:08,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 05:15:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501086126] [2020-11-07 05:15:08,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 05:15:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 05:15:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:15:08,128 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 16 states. [2020-11-07 05:15:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:09,349 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-11-07 05:15:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 05:15:09,350 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-11-07 05:15:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:09,352 INFO L225 Difference]: With dead ends: 175 [2020-11-07 05:15:09,352 INFO L226 Difference]: Without dead ends: 167 [2020-11-07 05:15:09,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-11-07 05:15:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-07 05:15:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2020-11-07 05:15:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 05:15:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-11-07 05:15:09,376 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 53 [2020-11-07 05:15:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:09,376 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-11-07 05:15:09,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 05:15:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-11-07 05:15:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 05:15:09,378 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:09,378 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] [2020-11-07 05:15:09,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 05:15:09,378 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash 6311014, now seen corresponding path program 2 times [2020-11-07 05:15:09,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:09,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226365404] [2020-11-07 05:15:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:09,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226365404] [2020-11-07 05:15:09,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:09,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 05:15:09,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713172060] [2020-11-07 05:15:09,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 05:15:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 05:15:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 05:15:09,877 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 22 states. [2020-11-07 05:15:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:11,893 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2020-11-07 05:15:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 05:15:11,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-11-07 05:15:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:11,896 INFO L225 Difference]: With dead ends: 207 [2020-11-07 05:15:11,897 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 05:15:11,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 05:15:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 05:15:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2020-11-07 05:15:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 05:15:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-11-07 05:15:11,926 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 58 [2020-11-07 05:15:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:11,926 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-11-07 05:15:11,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 05:15:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-11-07 05:15:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 05:15:11,929 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:11,929 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] [2020-11-07 05:15:11,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 05:15:11,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash -107072424, now seen corresponding path program 1 times [2020-11-07 05:15:11,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:11,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36843398] [2020-11-07 05:15:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:12,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:12,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36843398] [2020-11-07 05:15:12,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:12,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 05:15:12,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769203945] [2020-11-07 05:15:12,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 05:15:12,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 05:15:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 05:15:12,472 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 22 states. [2020-11-07 05:15:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:14,688 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2020-11-07 05:15:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 05:15:14,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-11-07 05:15:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:14,691 INFO L225 Difference]: With dead ends: 244 [2020-11-07 05:15:14,692 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 05:15:14,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 05:15:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 05:15:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 156. [2020-11-07 05:15:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 05:15:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-11-07 05:15:14,722 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 58 [2020-11-07 05:15:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:14,722 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-11-07 05:15:14,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 05:15:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-11-07 05:15:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 05:15:14,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:14,723 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] [2020-11-07 05:15:14,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 05:15:14,724 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:14,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1632354514, now seen corresponding path program 2 times [2020-11-07 05:15:14,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:14,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463782993] [2020-11-07 05:15:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:15,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463782993] [2020-11-07 05:15:15,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:15,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 05:15:15,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730066011] [2020-11-07 05:15:15,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 05:15:15,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 05:15:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:15:15,072 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 16 states. [2020-11-07 05:15:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:16,269 INFO L93 Difference]: Finished difference Result 214 states and 230 transitions. [2020-11-07 05:15:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 05:15:16,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-11-07 05:15:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:16,277 INFO L225 Difference]: With dead ends: 214 [2020-11-07 05:15:16,277 INFO L226 Difference]: Without dead ends: 193 [2020-11-07 05:15:16,279 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 [2020-11-07 05:15:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-07 05:15:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2020-11-07 05:15:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 05:15:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-11-07 05:15:16,305 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 59 [2020-11-07 05:15:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:16,305 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-11-07 05:15:16,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 05:15:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-11-07 05:15:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 05:15:16,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:16,306 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] [2020-11-07 05:15:16,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 05:15:16,306 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1451128578, now seen corresponding path program 1 times [2020-11-07 05:15:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:16,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641280161] [2020-11-07 05:15:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:16,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:16,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641280161] [2020-11-07 05:15:16,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:16,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 05:15:16,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820494396] [2020-11-07 05:15:16,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 05:15:16,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 05:15:16,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:15:16,635 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 16 states. [2020-11-07 05:15:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:17,739 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2020-11-07 05:15:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 05:15:17,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-11-07 05:15:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:17,742 INFO L225 Difference]: With dead ends: 193 [2020-11-07 05:15:17,742 INFO L226 Difference]: Without dead ends: 165 [2020-11-07 05:15:17,743 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 [2020-11-07 05:15:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-11-07 05:15:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2020-11-07 05:15:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-07 05:15:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-11-07 05:15:17,769 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 59 [2020-11-07 05:15:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:17,769 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-11-07 05:15:17,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 05:15:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-11-07 05:15:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 05:15:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:17,770 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] [2020-11-07 05:15:17,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 05:15:17,771 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1996705052, now seen corresponding path program 2 times [2020-11-07 05:15:17,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:17,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981152534] [2020-11-07 05:15:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:18,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:18,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981152534] [2020-11-07 05:15:18,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:18,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 05:15:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644644547] [2020-11-07 05:15:18,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 05:15:18,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:18,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 05:15:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:15:18,084 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-11-07 05:15:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:19,266 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-11-07 05:15:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 05:15:19,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-11-07 05:15:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:19,267 INFO L225 Difference]: With dead ends: 187 [2020-11-07 05:15:19,267 INFO L226 Difference]: Without dead ends: 159 [2020-11-07 05:15:19,269 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 [2020-11-07 05:15:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-07 05:15:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2020-11-07 05:15:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-07 05:15:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2020-11-07 05:15:19,293 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 59 [2020-11-07 05:15:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:19,293 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2020-11-07 05:15:19,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 05:15:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2020-11-07 05:15:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:15:19,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:19,295 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] [2020-11-07 05:15:19,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 05:15:19,295 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:19,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1610333710, now seen corresponding path program 3 times [2020-11-07 05:15:19,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:19,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713622912] [2020-11-07 05:15:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:20,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:20,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713622912] [2020-11-07 05:15:20,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:20,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 05:15:20,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23070583] [2020-11-07 05:15:20,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 05:15:20,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 05:15:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-11-07 05:15:20,094 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 24 states. [2020-11-07 05:15:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:23,165 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-11-07 05:15:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 05:15:23,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-11-07 05:15:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:23,168 INFO L225 Difference]: With dead ends: 210 [2020-11-07 05:15:23,168 INFO L226 Difference]: Without dead ends: 195 [2020-11-07 05:15:23,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 05:15:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-07 05:15:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 146. [2020-11-07 05:15:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-07 05:15:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2020-11-07 05:15:23,198 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 64 [2020-11-07 05:15:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:23,198 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2020-11-07 05:15:23,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 05:15:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2020-11-07 05:15:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:15:23,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:23,199 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] [2020-11-07 05:15:23,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 05:15:23,200 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1791559646, now seen corresponding path program 1 times [2020-11-07 05:15:23,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:23,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014848131] [2020-11-07 05:15:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:23,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:23,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014848131] [2020-11-07 05:15:23,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:23,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 05:15:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546096009] [2020-11-07 05:15:23,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 05:15:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 05:15:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 05:15:23,704 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand 22 states. [2020-11-07 05:15:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:25,783 INFO L93 Difference]: Finished difference Result 222 states and 238 transitions. [2020-11-07 05:15:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 05:15:25,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-11-07 05:15:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:25,785 INFO L225 Difference]: With dead ends: 222 [2020-11-07 05:15:25,785 INFO L226 Difference]: Without dead ends: 205 [2020-11-07 05:15:25,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 05:15:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-07 05:15:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-11-07 05:15:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 05:15:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-11-07 05:15:25,816 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 64 [2020-11-07 05:15:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:25,816 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-11-07 05:15:25,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 05:15:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-11-07 05:15:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:15:25,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:25,817 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] [2020-11-07 05:15:25,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 05:15:25,818 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:25,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2022992000, now seen corresponding path program 1 times [2020-11-07 05:15:25,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:25,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237150684] [2020-11-07 05:15:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237150684] [2020-11-07 05:15:26,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:15:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 05:15:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984332366] [2020-11-07 05:15:26,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 05:15:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 05:15:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-11-07 05:15:26,271 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 20 states. [2020-11-07 05:15:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:27,987 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2020-11-07 05:15:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 05:15:27,987 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-11-07 05:15:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:27,989 INFO L225 Difference]: With dead ends: 227 [2020-11-07 05:15:27,989 INFO L226 Difference]: Without dead ends: 206 [2020-11-07 05:15:27,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 05:15:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-07 05:15:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2020-11-07 05:15:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 05:15:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-11-07 05:15:28,021 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 64 [2020-11-07 05:15:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:28,022 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-11-07 05:15:28,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 05:15:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-11-07 05:15:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:15:28,023 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:28,023 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] [2020-11-07 05:15:28,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 05:15:28,023 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2090749360, now seen corresponding path program 1 times [2020-11-07 05:15:28,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:28,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969860146] [2020-11-07 05:15:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:15:28,039 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:15:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:15:28,054 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:15:28,092 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:15:28,092 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:15:28,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 05:15:28,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:15:28 BoogieIcfgContainer [2020-11-07 05:15:28,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:15:28,173 INFO L168 Benchmark]: Toolchain (without parser) took 30085.06 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.7 MB in the beginning and 228.5 MB in the end (delta: -102.7 MB). Peak memory consumption was 62.2 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:28,173 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:15:28,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.99 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 103.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:28,174 INFO L168 Benchmark]: Boogie Preprocessor took 105.29 ms. Allocated memory is still 151.0 MB. Free memory was 103.3 MB in the beginning and 100.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:28,175 INFO L168 Benchmark]: RCFGBuilder took 884.77 ms. Allocated memory is still 151.0 MB. Free memory was 100.6 MB in the beginning and 90.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:28,178 INFO L168 Benchmark]: TraceAbstraction took 28430.26 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 89.7 MB in the beginning and 228.5 MB in the end (delta: -138.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:28,181 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 650.99 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 103.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 105.29 ms. Allocated memory is still 151.0 MB. Free memory was 103.3 MB in the beginning and 100.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 884.77 ms. Allocated memory is still 151.0 MB. Free memory was 100.6 MB in the beginning and 90.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28430.26 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 89.7 MB in the beginning and 228.5 MB in the end (delta: -138.8 MB). Peak memory consumption was 24.8 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))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L546] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L547] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L548] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->n={-3:0}, t={-3:0}] [L548] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, 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))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-3:0}, t={-3:0}] [L550] p->h = 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-3:0}, t={-3:0}] [L551] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, t={-3:0}] [L552] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L552] COND FALSE !(p->h == 2) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] COND TRUE p->h == 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L555] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->n={-2:0}, t={-3:0}] [L555] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->n={-2:0}, t={-3:0}] [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L554] COND FALSE !(p->h == 1) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] COND TRUE p->h != 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, 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: 28.2s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 21.2s, 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, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 15.7s 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: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 790 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s 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...