/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:32:48,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:32:48,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:32:48,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:32:48,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:32:48,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:32:48,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:32:48,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:32:48,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:32:48,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:32:48,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:32:48,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:32:48,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:32:48,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:32:48,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:32:48,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:32:48,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:32:48,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:32:48,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:32:48,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:32:48,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:32:48,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:32:48,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:32:48,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:32:48,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:32:48,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:32:48,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:32:48,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:32:48,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:32:48,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:32:48,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:32:49,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:32:49,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:32:49,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:32:49,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:32:49,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:32:49,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:32:49,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:32:49,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:32:49,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:32:49,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:32:49,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:32:49,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:32:49,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:32:49,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:32:49,035 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:32:49,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:32:49,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:32:49,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:32:49,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:32:49,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:32:49,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:32:49,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:32:49,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:32:49,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:32:49,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:32:49,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:32:49,039 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:32:49,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:32:49,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:32:49,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:32:49,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:32:49,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:32:49,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:32:49,040 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:32:49,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:32:49,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:32:49,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:32:49,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:32:49,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:32:49,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-23 20:32:49,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba44cfaf/cf5b994ec96041d4af9282d5d02bc539/FLAG32a338977 [2020-10-23 20:32:50,262 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:32:50,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-10-23 20:32:50,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba44cfaf/cf5b994ec96041d4af9282d5d02bc539/FLAG32a338977 [2020-10-23 20:32:50,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba44cfaf/cf5b994ec96041d4af9282d5d02bc539 [2020-10-23 20:32:50,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:32:50,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:32:50,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:32:50,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:32:50,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:32:50,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:32:50" (1/1) ... [2020-10-23 20:32:50,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db028ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:50, skipping insertion in model container [2020-10-23 20:32:50,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:32:50" (1/1) ... [2020-10-23 20:32:50,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:32:50,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:32:50,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:32:50,998 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:32:51,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:32:51,134 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:32:51,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51 WrapperNode [2020-10-23 20:32:51,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:32:51,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:32:51,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:32:51,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:32:51,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... [2020-10-23 20:32:51,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:32:51,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:32:51,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:32:51,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:32:51,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:32:51,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:32:51,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:32:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:32:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 20:32:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 20:32:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-23 20:32:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-23 20:32:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-23 20:32:51,273 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 20:32:51,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:32:51,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:32:51,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:32:51,275 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:32:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:32:51,279 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:32:51,279 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:32:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:32:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:32:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:32:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:32:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:32:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:32:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:32:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:32:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:32:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:32:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:32:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:32:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 20:32:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 20:32:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-23 20:32:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-23 20:32:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-23 20:32:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:32:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:32:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:32:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:32:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:32:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:32:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:32:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:32:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:32:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:32:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:32:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:32:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:32:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:32:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:32:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:32:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:32:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:32:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:32:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:32:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:32:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:32:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:32:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:32:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:32:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:32:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:32:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:32:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:32:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:32:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:32:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:32:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:32:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:32:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:32:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:32:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:32:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:32:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:32:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:32:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:32:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:32:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:32:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:32:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:32:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:32:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:32:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:32:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:32:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:32:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:32:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:32:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:32:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 20:32:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:32:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:32:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:32:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:32:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:32:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:32:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:32:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:32:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:32:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:32:51,684 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 20:32:51,849 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:32:51,850 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 20:32:51,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:32:51 BoogieIcfgContainer [2020-10-23 20:32:51,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:32:51,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:32:51,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:32:51,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:32:51,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:32:50" (1/3) ... [2020-10-23 20:32:51,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd8c6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:32:51, skipping insertion in model container [2020-10-23 20:32:51,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:51" (2/3) ... [2020-10-23 20:32:51,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd8c6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:32:51, skipping insertion in model container [2020-10-23 20:32:51,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:32:51" (3/3) ... [2020-10-23 20:32:51,861 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-23 20:32:51,872 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:32:51,878 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:32:51,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:32:51,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:32:51,915 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:32:51,915 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:32:51,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:32:51,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:32:51,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:32:51,916 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:32:51,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:32:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-10-23 20:32:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 20:32:51,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:51,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:51,944 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2107792998, now seen corresponding path program 1 times [2020-10-23 20:32:51,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:51,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439975161] [2020-10-23 20:32:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:52,046 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:52,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:52,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439975161] [2020-10-23 20:32:52,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:52,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 20:32:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301250449] [2020-10-23 20:32:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 20:32:52,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 20:32:52,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:32:52,272 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 3 states. [2020-10-23 20:32:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:52,452 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-10-23 20:32:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 20:32:52,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-23 20:32:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:52,462 INFO L225 Difference]: With dead ends: 122 [2020-10-23 20:32:52,463 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 20:32:52,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:32:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 20:32:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-23 20:32:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 20:32:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-23 20:32:52,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 28 [2020-10-23 20:32:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:52,516 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-23 20:32:52,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 20:32:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-23 20:32:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 20:32:52,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:52,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:52,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:32:52,519 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash 166627174, now seen corresponding path program 1 times [2020-10-23 20:32:52,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:52,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995821381] [2020-10-23 20:32:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:52,527 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:52,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995821381] [2020-10-23 20:32:52,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:52,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:32:52,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712347086] [2020-10-23 20:32:52,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:32:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:32:52,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:32:52,776 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 7 states. [2020-10-23 20:32:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:53,128 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-23 20:32:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:32:53,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-23 20:32:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:53,132 INFO L225 Difference]: With dead ends: 140 [2020-10-23 20:32:53,133 INFO L226 Difference]: Without dead ends: 132 [2020-10-23 20:32:53,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:32:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-23 20:32:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-10-23 20:32:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-23 20:32:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-23 20:32:53,152 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 36 [2020-10-23 20:32:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:53,152 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-23 20:32:53,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:32:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-23 20:32:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:32:53,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:53,155 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:53,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:32:53,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1766737650, now seen corresponding path program 1 times [2020-10-23 20:32:53,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:53,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637021947] [2020-10-23 20:32:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:53,242 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:32:53,247 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:53,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:53,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637021947] [2020-10-23 20:32:53,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:53,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:32:53,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116811340] [2020-10-23 20:32:53,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:32:53,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:32:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:32:53,364 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 7 states. [2020-10-23 20:32:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:53,606 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-10-23 20:32:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:32:53,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 20:32:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:53,608 INFO L225 Difference]: With dead ends: 143 [2020-10-23 20:32:53,608 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 20:32:53,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:32:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 20:32:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-10-23 20:32:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-23 20:32:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-23 20:32:53,621 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 42 [2020-10-23 20:32:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:53,621 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-23 20:32:53,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:32:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-23 20:32:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:32:53,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:53,623 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:53,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:32:53,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1585511714, now seen corresponding path program 1 times [2020-10-23 20:32:53,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:53,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992401061] [2020-10-23 20:32:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:53,695 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:32:53,701 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:53,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:53,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992401061] [2020-10-23 20:32:53,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:53,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:32:53,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868720573] [2020-10-23 20:32:53,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:32:53,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:32:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:32:53,857 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 7 states. [2020-10-23 20:32:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:54,126 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-10-23 20:32:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:32:54,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 20:32:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:54,129 INFO L225 Difference]: With dead ends: 122 [2020-10-23 20:32:54,129 INFO L226 Difference]: Without dead ends: 100 [2020-10-23 20:32:54,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:32:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-23 20:32:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2020-10-23 20:32:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 20:32:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-23 20:32:54,147 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 42 [2020-10-23 20:32:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:54,147 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-23 20:32:54,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:32:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-23 20:32:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:32:54,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:54,151 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:54,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:32:54,152 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1457672738, now seen corresponding path program 1 times [2020-10-23 20:32:54,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:54,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933037443] [2020-10-23 20:32:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:54,402 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:32:54,457 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:54,532 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:54,537 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:54,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:54,599 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:54,599 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:32:54,923 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:32:54,936 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:55,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:55,012 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:55,073 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:55,076 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:55,076 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:32:55,145 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:32:55,148 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933037443] [2020-10-23 20:32:55,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:55,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:32:55,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953255694] [2020-10-23 20:32:55,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:32:55,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:32:55,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:32:55,455 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-10-23 20:32:56,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:56,344 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2020-10-23 20:32:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:32:56,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-23 20:32:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:56,346 INFO L225 Difference]: With dead ends: 163 [2020-10-23 20:32:56,346 INFO L226 Difference]: Without dead ends: 148 [2020-10-23 20:32:56,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:32:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-23 20:32:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 84. [2020-10-23 20:32:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 20:32:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-23 20:32:56,363 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 47 [2020-10-23 20:32:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:56,364 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-23 20:32:56,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:32:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-23 20:32:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:32:56,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:56,365 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:56,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:32:56,366 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash -213825236, now seen corresponding path program 1 times [2020-10-23 20:32:56,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:56,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737110920] [2020-10-23 20:32:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:56,579 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:32:56,596 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:56,668 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:56,672 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:56,734 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:56,736 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:56,736 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:32:57,036 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:32:57,058 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:57,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:57,136 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:57,205 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:57,207 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:57,208 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:32:57,284 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:32:57,289 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:57,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:57,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737110920] [2020-10-23 20:32:57,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:57,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:32:57,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027324815] [2020-10-23 20:32:57,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:32:57,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:32:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:32:57,582 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-10-23 20:32:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:58,586 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2020-10-23 20:32:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:32:58,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-23 20:32:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:58,588 INFO L225 Difference]: With dead ends: 187 [2020-10-23 20:32:58,588 INFO L226 Difference]: Without dead ends: 179 [2020-10-23 20:32:58,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:32:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-23 20:32:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 106. [2020-10-23 20:32:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-23 20:32:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-10-23 20:32:58,624 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 47 [2020-10-23 20:32:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:58,624 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-10-23 20:32:58,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:32:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-10-23 20:32:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 20:32:58,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:58,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:58,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:32:58,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash -816306810, now seen corresponding path program 1 times [2020-10-23 20:32:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:58,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540438522] [2020-10-23 20:32:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:58,843 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:32:58,857 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:58,931 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:58,937 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:58,999 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:59,001 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:59,002 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:32:59,321 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:32:59,336 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:59,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:59,427 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:59,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:59,493 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:59,493 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:32:59,555 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:32:59,558 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:59,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:59,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540438522] [2020-10-23 20:32:59,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:59,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:32:59,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037940331] [2020-10-23 20:32:59,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:32:59,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:32:59,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:32:59,982 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 16 states. [2020-10-23 20:33:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:01,219 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2020-10-23 20:33:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:33:01,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-23 20:33:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:01,224 INFO L225 Difference]: With dead ends: 171 [2020-10-23 20:33:01,224 INFO L226 Difference]: Without dead ends: 163 [2020-10-23 20:33:01,225 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 [2020-10-23 20:33:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-23 20:33:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2020-10-23 20:33:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-23 20:33:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-10-23 20:33:01,263 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 53 [2020-10-23 20:33:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:01,264 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-10-23 20:33:01,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:33:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-10-23 20:33:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 20:33:01,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:01,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:01,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:33:01,270 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:01,271 INFO L82 PathProgramCache]: Analyzing trace with hash 927043156, now seen corresponding path program 1 times [2020-10-23 20:33:01,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:01,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94045600] [2020-10-23 20:33:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:01,481 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:01,496 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:01,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:01,568 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:01,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:01,628 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:01,629 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:01,948 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:33:01,964 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:02,045 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:02,050 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:02,114 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:02,116 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:02,116 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:02,210 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:02,214 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:02,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94045600] [2020-10-23 20:33:02,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:02,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:33:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250995006] [2020-10-23 20:33:02,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:33:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:02,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:33:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:33:02,481 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 15 states. [2020-10-23 20:33:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:03,384 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2020-10-23 20:33:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 20:33:03,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-23 20:33:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:03,388 INFO L225 Difference]: With dead ends: 199 [2020-10-23 20:33:03,389 INFO L226 Difference]: Without dead ends: 178 [2020-10-23 20:33:03,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-10-23 20:33:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-23 20:33:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 112. [2020-10-23 20:33:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-23 20:33:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-10-23 20:33:03,422 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 53 [2020-10-23 20:33:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:03,422 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-10-23 20:33:03,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:33:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-10-23 20:33:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 20:33:03,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:03,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:03,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:33:03,424 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1108269092, now seen corresponding path program 1 times [2020-10-23 20:33:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:03,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584754520] [2020-10-23 20:33:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:03,644 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:03,657 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:03,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:03,740 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:03,797 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:03,798 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:03,799 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:04,054 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:33:04,068 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:04,141 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:04,151 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:04,208 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:04,210 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:04,210 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:04,291 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:04,295 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:04,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584754520] [2020-10-23 20:33:04,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:04,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:33:04,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695585626] [2020-10-23 20:33:04,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:33:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:33:04,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:33:04,641 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 16 states. [2020-10-23 20:33:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:05,883 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-10-23 20:33:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:33:05,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-23 20:33:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:05,885 INFO L225 Difference]: With dead ends: 175 [2020-10-23 20:33:05,885 INFO L226 Difference]: Without dead ends: 167 [2020-10-23 20:33:05,887 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 [2020-10-23 20:33:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-23 20:33:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2020-10-23 20:33:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 20:33:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-23 20:33:05,911 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 53 [2020-10-23 20:33:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:05,913 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-23 20:33:05,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:33:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-23 20:33:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 20:33:05,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:05,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:05,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:33:05,914 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash 6311014, now seen corresponding path program 2 times [2020-10-23 20:33:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:05,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173892910] [2020-10-23 20:33:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:06,134 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:06,145 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:06,220 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:06,225 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:06,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:06,293 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:06,293 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:06,468 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:33:06,487 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:06,493 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:06,791 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:06,791 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:06,793 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-10-23 20:33:06,793 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:33:07,056 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:07,254 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:07,269 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:07,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:07,338 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:07,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:07,396 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:07,396 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:07,570 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:33:07,583 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:07,588 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:07,869 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:07,870 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:07,872 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-10-23 20:33:07,872 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:33:08,125 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:08,331 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:08,347 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:08,418 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:08,423 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:08,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:08,492 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:08,492 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:08,755 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:08,768 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:08,843 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:08,848 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:08,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:08,917 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:08,917 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:33:09,190 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:09,201 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:09,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:09,282 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:09,351 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:09,352 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:09,352 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:33:09,620 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:09,631 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:09,711 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:09,715 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:09,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:09,772 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:09,772 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:10,028 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-23 20:33:10,041 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,106 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:10,107 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:33:10,378 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-23 20:33:10,389 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:10,459 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:33:10,726 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:10,747 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:10,826 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:10,889 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:10,890 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:10,952 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:10,954 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:11,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:11,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173892910] [2020-10-23 20:33:11,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:11,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:33:11,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784492240] [2020-10-23 20:33:11,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:33:11,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:33:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:33:11,520 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 22 states. [2020-10-23 20:33:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:13,597 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2020-10-23 20:33:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-23 20:33:13,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-23 20:33:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:13,599 INFO L225 Difference]: With dead ends: 207 [2020-10-23 20:33:13,600 INFO L226 Difference]: Without dead ends: 199 [2020-10-23 20:33:13,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 20:33:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-23 20:33:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2020-10-23 20:33:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 20:33:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-23 20:33:13,627 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 58 [2020-10-23 20:33:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:13,628 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-23 20:33:13,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:33:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-23 20:33:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 20:33:13,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:13,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:13,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:33:13,629 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash -107072424, now seen corresponding path program 1 times [2020-10-23 20:33:13,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:13,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425005616] [2020-10-23 20:33:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:13,835 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:13,843 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:13,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:13,914 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:13,971 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:13,972 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:13,973 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:14,243 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:14,252 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:14,318 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:14,323 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:14,380 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:14,382 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:14,382 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:14,640 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:33:14,653 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:14,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:14,722 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:14,781 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:14,781 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:14,782 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:15,053 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:15,068 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:15,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:15,137 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:15,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:15,194 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:15,195 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:15,258 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:15,261 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:15,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:15,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425005616] [2020-10-23 20:33:15,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:15,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:33:15,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351751546] [2020-10-23 20:33:15,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:33:15,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:15,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:33:15,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:33:15,754 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 22 states. [2020-10-23 20:33:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:17,868 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2020-10-23 20:33:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 20:33:17,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-23 20:33:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:17,871 INFO L225 Difference]: With dead ends: 244 [2020-10-23 20:33:17,872 INFO L226 Difference]: Without dead ends: 236 [2020-10-23 20:33:17,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 20:33:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-23 20:33:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 156. [2020-10-23 20:33:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-23 20:33:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-10-23 20:33:17,898 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 58 [2020-10-23 20:33:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:17,898 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-10-23 20:33:17,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:33:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-10-23 20:33:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:33:17,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:17,900 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:17,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:33:17,900 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1632354514, now seen corresponding path program 2 times [2020-10-23 20:33:17,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:17,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022912409] [2020-10-23 20:33:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:18,113 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:18,125 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:18,197 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:18,202 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:18,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:18,259 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:18,259 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:18,687 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:18,710 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:18,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:18,781 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:18,838 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:18,839 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:18,840 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:18,904 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:18,907 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:19,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:19,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022912409] [2020-10-23 20:33:19,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:19,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:33:19,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228260778] [2020-10-23 20:33:19,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:33:19,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:19,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:33:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:33:19,276 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 16 states. [2020-10-23 20:33:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:20,486 INFO L93 Difference]: Finished difference Result 214 states and 230 transitions. [2020-10-23 20:33:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:33:20,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-23 20:33:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:20,488 INFO L225 Difference]: With dead ends: 214 [2020-10-23 20:33:20,489 INFO L226 Difference]: Without dead ends: 193 [2020-10-23 20:33:20,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:33:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-23 20:33:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2020-10-23 20:33:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-23 20:33:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-10-23 20:33:20,519 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 59 [2020-10-23 20:33:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:20,519 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-10-23 20:33:20,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:33:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-10-23 20:33:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:33:20,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:20,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:20,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:33:20,520 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1451128578, now seen corresponding path program 1 times [2020-10-23 20:33:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473683663] [2020-10-23 20:33:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:20,722 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:20,733 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:20,801 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:20,811 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:20,869 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:20,871 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:20,871 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:21,200 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:21,213 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:21,279 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:21,284 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:21,344 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:21,345 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:21,346 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:21,439 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:21,443 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:21,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:21,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473683663] [2020-10-23 20:33:21,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:21,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:33:21,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611204082] [2020-10-23 20:33:21,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:33:21,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:33:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:33:21,788 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 16 states. [2020-10-23 20:33:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:22,917 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2020-10-23 20:33:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:33:22,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-23 20:33:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:22,920 INFO L225 Difference]: With dead ends: 193 [2020-10-23 20:33:22,920 INFO L226 Difference]: Without dead ends: 165 [2020-10-23 20:33:22,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-10-23 20:33:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-23 20:33:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2020-10-23 20:33:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-23 20:33:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-10-23 20:33:22,943 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 59 [2020-10-23 20:33:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:22,943 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-10-23 20:33:22,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:33:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-10-23 20:33:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:33:22,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:22,944 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:22,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:33:22,944 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1996705052, now seen corresponding path program 2 times [2020-10-23 20:33:22,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:22,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927413805] [2020-10-23 20:33:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:23,225 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:23,231 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:23,301 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:23,317 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:23,379 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:23,380 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:23,380 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:23,667 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:33:23,682 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:23,752 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:23,763 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:23,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:23,824 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:23,825 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:23,961 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:23,966 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:24,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927413805] [2020-10-23 20:33:24,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:24,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:33:24,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025296994] [2020-10-23 20:33:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:33:24,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:33:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:33:24,348 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-10-23 20:33:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:25,563 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-10-23 20:33:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:33:25,564 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-23 20:33:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:25,565 INFO L225 Difference]: With dead ends: 187 [2020-10-23 20:33:25,565 INFO L226 Difference]: Without dead ends: 159 [2020-10-23 20:33:25,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-10-23 20:33:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-23 20:33:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2020-10-23 20:33:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-23 20:33:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2020-10-23 20:33:25,590 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 59 [2020-10-23 20:33:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:25,591 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2020-10-23 20:33:25,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:33:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2020-10-23 20:33:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 20:33:25,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:25,592 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:25,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:33:25,592 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1610333710, now seen corresponding path program 3 times [2020-10-23 20:33:25,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:25,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600376603] [2020-10-23 20:33:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:25,702 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:33:25,712 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:25,718 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:25,947 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:25,947 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:25,949 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-10-23 20:33:25,949 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:33:26,207 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:26,320 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:33:26,328 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:26,332 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:26,586 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:26,586 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:26,587 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-10-23 20:33:26,588 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:33:26,812 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:27,023 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:27,032 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:27,108 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:27,112 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:27,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:27,175 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:27,175 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:27,450 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:27,462 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:27,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:27,546 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:27,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:27,626 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:27,626 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:33:27,921 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:27,934 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:28,013 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,079 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:28,080 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,080 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:33:28,361 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:28,381 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:28,462 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:28,531 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,531 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:28,820 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:28,834 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,912 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:28,918 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,982 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:28,983 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:28,983 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:29,262 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:29,274 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:29,337 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:29,343 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:29,403 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:29,403 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:29,404 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:29,645 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-23 20:33:29,653 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:29,720 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:29,721 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:29,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:33:29,974 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-23 20:33:29,991 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:30,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:30,058 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:30,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:33:30,341 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:30,348 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:30,426 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:30,431 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:30,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:30,491 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:30,492 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:30,557 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:30,560 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:31,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600376603] [2020-10-23 20:33:31,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:31,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:33:31,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874837620] [2020-10-23 20:33:31,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:33:31,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:33:31,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:33:31,415 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 24 states. [2020-10-23 20:33:32,844 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-23 20:33:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:34,531 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-10-23 20:33:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 20:33:34,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-10-23 20:33:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:34,534 INFO L225 Difference]: With dead ends: 210 [2020-10-23 20:33:34,534 INFO L226 Difference]: Without dead ends: 195 [2020-10-23 20:33:34,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 20:33:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-23 20:33:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 146. [2020-10-23 20:33:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-23 20:33:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2020-10-23 20:33:34,559 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 64 [2020-10-23 20:33:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:34,560 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2020-10-23 20:33:34,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:33:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2020-10-23 20:33:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 20:33:34,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:34,561 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:34,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:33:34,561 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1791559646, now seen corresponding path program 1 times [2020-10-23 20:33:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:34,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368393935] [2020-10-23 20:33:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:34,672 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:33:34,680 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:34,687 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:34,916 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:34,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:34,918 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-10-23 20:33:34,918 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:33:35,141 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:35,250 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:33:35,259 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:35,265 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:35,522 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:35,522 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:35,523 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-10-23 20:33:35,524 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:33:35,785 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:33:35,992 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:35,999 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,071 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:36,075 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,133 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:36,134 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,135 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:36,423 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:36,439 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:36,521 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,593 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:36,594 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,594 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:33:36,856 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:36,864 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:36,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:36,947 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:37,015 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,015 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:33:37,290 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:37,297 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:37,372 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,433 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:37,434 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,434 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:37,725 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:37,732 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:37,807 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,869 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:37,870 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:37,871 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:38,133 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:38,142 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:38,223 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,282 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:38,283 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,283 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:38,555 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-23 20:33:38,560 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:38,626 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:33:38,888 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-23 20:33:38,900 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,969 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:38,969 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:38,970 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:33:39,272 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:39,279 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:39,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:39,351 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:39,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:39,411 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:39,411 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:39,470 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:39,473 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368393935] [2020-10-23 20:33:40,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:40,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:33:40,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8430573] [2020-10-23 20:33:40,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:33:40,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:33:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:33:40,133 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand 22 states. [2020-10-23 20:33:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:42,242 INFO L93 Difference]: Finished difference Result 222 states and 238 transitions. [2020-10-23 20:33:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-23 20:33:42,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-23 20:33:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:42,244 INFO L225 Difference]: With dead ends: 222 [2020-10-23 20:33:42,244 INFO L226 Difference]: Without dead ends: 205 [2020-10-23 20:33:42,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 20:33:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-23 20:33:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-10-23 20:33:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-23 20:33:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-10-23 20:33:42,275 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 64 [2020-10-23 20:33:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:42,275 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-10-23 20:33:42,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:33:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-10-23 20:33:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 20:33:42,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:42,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:42,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:33:42,277 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2022992000, now seen corresponding path program 1 times [2020-10-23 20:33:42,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:42,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065660186] [2020-10-23 20:33:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:42,480 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:42,498 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:42,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:42,575 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:42,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:42,633 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:42,633 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:42,908 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:42,915 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:42,982 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:42,987 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:43,050 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,050 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:43,336 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:33:43,351 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:43,442 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:43,504 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,505 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:43,807 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:43,813 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:43,884 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:43,943 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:43,943 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:44,003 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:44,005 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:44,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:33:44,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065660186] [2020-10-23 20:33:44,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:44,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 20:33:44,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134789645] [2020-10-23 20:33:44,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 20:33:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 20:33:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:33:44,463 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 20 states. [2020-10-23 20:33:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:46,128 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2020-10-23 20:33:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 20:33:46,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-23 20:33:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:46,131 INFO L225 Difference]: With dead ends: 227 [2020-10-23 20:33:46,131 INFO L226 Difference]: Without dead ends: 206 [2020-10-23 20:33:46,132 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 [2020-10-23 20:33:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-23 20:33:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2020-10-23 20:33:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-23 20:33:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-23 20:33:46,163 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 64 [2020-10-23 20:33:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:46,163 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-23 20:33:46,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 20:33:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-23 20:33:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 20:33:46,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:46,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:46,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:33:46,165 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2090749360, now seen corresponding path program 1 times [2020-10-23 20:33:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:46,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414607478] [2020-10-23 20:33:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:46,375 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:46,388 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:46,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:46,463 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:46,524 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:46,525 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:46,525 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:46,804 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:33:46,816 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:46,884 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:46,887 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:46,946 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:46,947 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:46,947 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:47,220 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:33:47,231 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:47,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:47,302 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:47,357 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:47,358 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:47,358 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:47,620 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:33:47,628 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:47,697 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:47,701 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:47,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:33:47,762 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:33:47,762 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:33:47,849 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:33:47,852 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:33:47,864 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:33:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:33:47,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:33:47,933 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:33:47,933 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:33:47,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:33:47,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:33:47 BoogieIcfgContainer [2020-10-23 20:33:47,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:33:47,959 INFO L168 Benchmark]: Toolchain (without parser) took 57375.60 ms. Allocated memory was 151.0 MB in the beginning and 357.6 MB in the end (delta: 206.6 MB). Free memory was 126.1 MB in the beginning and 230.6 MB in the end (delta: -104.5 MB). Peak memory consumption was 103.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:33:47,959 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.0 MB in the end (delta: 279.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:33:47,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 542.58 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 103.8 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:33:47,962 INFO L168 Benchmark]: Boogie Preprocessor took 59.70 ms. Allocated memory is still 151.0 MB. Free memory was 103.8 MB in the beginning and 101.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:33:47,964 INFO L168 Benchmark]: RCFGBuilder took 655.71 ms. Allocated memory is still 151.0 MB. Free memory was 101.0 MB in the beginning and 105.9 MB in the end (delta: -4.9 MB). Peak memory consumption was 24.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:33:47,964 INFO L168 Benchmark]: TraceAbstraction took 56104.50 ms. Allocated memory was 151.0 MB in the beginning and 357.6 MB in the end (delta: 206.6 MB). Free memory was 105.4 MB in the beginning and 230.6 MB in the end (delta: -125.3 MB). Peak memory consumption was 81.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:33:47,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.0 MB in the end (delta: 279.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 542.58 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 103.8 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.70 ms. Allocated memory is still 151.0 MB. Free memory was 103.8 MB in the beginning and 101.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 655.71 ms. Allocated memory is still 151.0 MB. Free memory was 101.0 MB in the beginning and 105.9 MB in the end (delta: -4.9 MB). Peak memory consumption was 24.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 56104.50 ms. Allocated memory was 151.0 MB in the beginning and 357.6 MB in the end (delta: 206.6 MB). Free memory was 105.4 MB in the beginning and 230.6 MB in the end (delta: -125.3 MB). Peak memory consumption was 81.3 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)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [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: 56.0s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 21.0s, 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, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 15.8s 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: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...