/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-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:39:29,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:39:29,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:39:29,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:39:29,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:39:29,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:39:29,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:39:29,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:39:29,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:39:29,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:39:29,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:39:29,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:39:29,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:39:29,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:39:29,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:39:29,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:39:29,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:39:29,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:39:29,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:39:29,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:39:29,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:39:29,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:39:29,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:39:29,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:39:29,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:39:29,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:39:29,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:39:29,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:39:29,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:39:29,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:39:29,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:39:29,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:39:29,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:39:29,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:39:29,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:39:29,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:39:29,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:39:29,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:39:29,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:39:29,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:39:29,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:39:29,978 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 20:39:29,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:39:29,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:39:29,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:39:29,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:39:29,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:39:29,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:39:29,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:39:29,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:39:29,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:39:29,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:39:29,996 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:39:29,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:39:29,996 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:39:29,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:39:29,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:39:29,997 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:39:29,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:39:29,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:39:29,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:39:29,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:39:29,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:39:29,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:39:29,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:39:30,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:39:30,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:39:30,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:39:30,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:39:30,460 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:39:30,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-10-23 20:39:30,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1af9ec1d/b7bd2bbcea824beabd1b1c32cbb9926b/FLAG9a0082982 [2020-10-23 20:39:31,406 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:39:31,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-10-23 20:39:31,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1af9ec1d/b7bd2bbcea824beabd1b1c32cbb9926b/FLAG9a0082982 [2020-10-23 20:39:31,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1af9ec1d/b7bd2bbcea824beabd1b1c32cbb9926b [2020-10-23 20:39:31,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:39:31,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:39:31,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:39:31,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:39:31,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:39:31,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:39:31" (1/1) ... [2020-10-23 20:39:31,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fd2b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:31, skipping insertion in model container [2020-10-23 20:39:31,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:39:31" (1/1) ... [2020-10-23 20:39:31,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:39:31,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:39:32,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:39:32,172 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:39:32,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:39:32,350 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:39:32,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32 WrapperNode [2020-10-23 20:39:32,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:39:32,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:39:32,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:39:32,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:39:32,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (1/1) ... [2020-10-23 20:39:32,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:39:32,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:39:32,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:39:32,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:39:32,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (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 20:39:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:39:32,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:39:32,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:39:32,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 20:39:32,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 20:39:32,563 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 20:39:32,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:39:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:39:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:39:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:39:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:39:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:39:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:39:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:39:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:39:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:39:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:39:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:39:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:39:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:39:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:39:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:39:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:39:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:39:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:39:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:39:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:39:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:39:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:39:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:39:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 20:39:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 20:39:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:39:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:39:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:39:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:39:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:39:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:39:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:39:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:39:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:39:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:39:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:39:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:39:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:39:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:39:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:39:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:39:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:39:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:39:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:39:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:39:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:39:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:39:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:39:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:39:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:39:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:39:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:39:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:39:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:39:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:39:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:39:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:39:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:39:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:39:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:39:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:39:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:39:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:39:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 20:39:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:39:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:39:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:39:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:39:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:39:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:39:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:39:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:39:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:39:32,583 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:39:32,583 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:39:32,583 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:39:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:39:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:39:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:39:32,585 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:39:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:39:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:39:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:39:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:39:32,587 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:39:32,587 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:39:32,587 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:39:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:39:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:39:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:39:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:39:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:39:32,589 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:39:32,590 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:39:32,591 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:39:32,591 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:39:32,591 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:39:32,591 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 20:39:32,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:39:32,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:39:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:39:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:39:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:39:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:39:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:39:32,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:39:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:39:32,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:39:32,931 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 20:39:33,441 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:39:33,442 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-23 20:39:33,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:39:33 BoogieIcfgContainer [2020-10-23 20:39:33,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:39:33,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:39:33,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:39:33,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:39:33,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:39:31" (1/3) ... [2020-10-23 20:39:33,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eec530a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:39:33, skipping insertion in model container [2020-10-23 20:39:33,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:39:32" (2/3) ... [2020-10-23 20:39:33,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eec530a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:39:33, skipping insertion in model container [2020-10-23 20:39:33,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:39:33" (3/3) ... [2020-10-23 20:39:33,455 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-10-23 20:39:33,468 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:39:33,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:39:33,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:39:33,517 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:39:33,518 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:39:33,518 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:39:33,518 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:39:33,518 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:39:33,518 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:39:33,518 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:39:33,518 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:39:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states. [2020-10-23 20:39:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 20:39:33,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:33,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:33,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1423555653, now seen corresponding path program 1 times [2020-10-23 20:39:33,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:33,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755144623] [2020-10-23 20:39:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:33,667 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,863 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 20:39:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755144623] [2020-10-23 20:39:33,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:33,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 20:39:33,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916130762] [2020-10-23 20:39:33,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 20:39:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 20:39:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:39:33,896 INFO L87 Difference]: Start difference. First operand 187 states. Second operand 3 states. [2020-10-23 20:39:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:34,340 INFO L93 Difference]: Finished difference Result 354 states and 415 transitions. [2020-10-23 20:39:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 20:39:34,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-10-23 20:39:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:34,355 INFO L225 Difference]: With dead ends: 354 [2020-10-23 20:39:34,355 INFO L226 Difference]: Without dead ends: 172 [2020-10-23 20:39:34,361 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 20:39:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-23 20:39:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-23 20:39:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-23 20:39:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 189 transitions. [2020-10-23 20:39:34,427 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 189 transitions. Word has length 37 [2020-10-23 20:39:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:34,427 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 189 transitions. [2020-10-23 20:39:34,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 20:39:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 189 transitions. [2020-10-23 20:39:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:39:34,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:34,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:34,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:39:34,432 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1825754480, now seen corresponding path program 1 times [2020-10-23 20:39:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:34,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844533492] [2020-10-23 20:39:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:34,440 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,623 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 20:39:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844533492] [2020-10-23 20:39:34,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:34,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 20:39:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587860951] [2020-10-23 20:39:34,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 20:39:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 20:39:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:39:34,630 INFO L87 Difference]: Start difference. First operand 172 states and 189 transitions. Second operand 5 states. [2020-10-23 20:39:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:35,041 INFO L93 Difference]: Finished difference Result 259 states and 285 transitions. [2020-10-23 20:39:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 20:39:35,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-23 20:39:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:35,046 INFO L225 Difference]: With dead ends: 259 [2020-10-23 20:39:35,047 INFO L226 Difference]: Without dead ends: 207 [2020-10-23 20:39:35,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:39:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-23 20:39:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2020-10-23 20:39:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-23 20:39:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-10-23 20:39:35,082 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 47 [2020-10-23 20:39:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:35,082 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-10-23 20:39:35,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 20:39:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-10-23 20:39:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:39:35,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:35,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:35,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:39:35,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1787311828, now seen corresponding path program 1 times [2020-10-23 20:39:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:35,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624567192] [2020-10-23 20:39:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:35,111 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:35,115 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:35,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:35,293 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 20:39:35,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624567192] [2020-10-23 20:39:35,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:39:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519619534] [2020-10-23 20:39:35,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:39:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:39:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:39:35,297 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 7 states. [2020-10-23 20:39:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:36,121 INFO L93 Difference]: Finished difference Result 538 states and 604 transitions. [2020-10-23 20:39:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:39:36,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-23 20:39:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:36,128 INFO L225 Difference]: With dead ends: 538 [2020-10-23 20:39:36,128 INFO L226 Difference]: Without dead ends: 417 [2020-10-23 20:39:36,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:39:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-23 20:39:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 290. [2020-10-23 20:39:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-23 20:39:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 325 transitions. [2020-10-23 20:39:36,209 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 325 transitions. Word has length 60 [2020-10-23 20:39:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:36,212 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 325 transitions. [2020-10-23 20:39:36,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:39:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 325 transitions. [2020-10-23 20:39:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 20:39:36,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:36,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:36,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:39:36,231 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:36,235 INFO L82 PathProgramCache]: Analyzing trace with hash -534721967, now seen corresponding path program 1 times [2020-10-23 20:39:36,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:36,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294584323] [2020-10-23 20:39:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:36,400 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:36,467 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:36,471 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:36,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:36,641 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 20:39:36,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294584323] [2020-10-23 20:39:36,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:36,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:39:36,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810271251] [2020-10-23 20:39:36,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:39:36,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:39:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:39:36,646 INFO L87 Difference]: Start difference. First operand 290 states and 325 transitions. Second operand 7 states. [2020-10-23 20:39:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:37,251 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2020-10-23 20:39:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:39:37,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-23 20:39:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:37,258 INFO L225 Difference]: With dead ends: 367 [2020-10-23 20:39:37,258 INFO L226 Difference]: Without dead ends: 359 [2020-10-23 20:39:37,260 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 20:39:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-23 20:39:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 303. [2020-10-23 20:39:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-23 20:39:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 341 transitions. [2020-10-23 20:39:37,302 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 341 transitions. Word has length 62 [2020-10-23 20:39:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:37,303 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 341 transitions. [2020-10-23 20:39:37,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:39:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 341 transitions. [2020-10-23 20:39:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 20:39:37,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:37,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:37,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:39:37,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash 846185769, now seen corresponding path program 1 times [2020-10-23 20:39:37,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:37,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144316807] [2020-10-23 20:39:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:37,482 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:37,558 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:37,562 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,692 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 20:39:37,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144316807] [2020-10-23 20:39:37,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:37,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:39:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618699374] [2020-10-23 20:39:37,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:39:37,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:39:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:39:37,696 INFO L87 Difference]: Start difference. First operand 303 states and 341 transitions. Second operand 7 states. [2020-10-23 20:39:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:38,274 INFO L93 Difference]: Finished difference Result 370 states and 412 transitions. [2020-10-23 20:39:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:39:38,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-23 20:39:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:38,281 INFO L225 Difference]: With dead ends: 370 [2020-10-23 20:39:38,281 INFO L226 Difference]: Without dead ends: 353 [2020-10-23 20:39:38,282 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 20:39:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-23 20:39:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 300. [2020-10-23 20:39:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-23 20:39:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 337 transitions. [2020-10-23 20:39:38,327 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 337 transitions. Word has length 68 [2020-10-23 20:39:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:38,332 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 337 transitions. [2020-10-23 20:39:38,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:39:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 337 transitions. [2020-10-23 20:39:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 20:39:38,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:38,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:38,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:39:38,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash 664959833, now seen corresponding path program 1 times [2020-10-23 20:39:38,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:38,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099250621] [2020-10-23 20:39:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:38,492 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:38,599 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:38,608 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,726 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 20:39:38,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099250621] [2020-10-23 20:39:38,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:38,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:39:38,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864951461] [2020-10-23 20:39:38,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:39:38,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:38,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:39:38,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:39:38,728 INFO L87 Difference]: Start difference. First operand 300 states and 337 transitions. Second operand 7 states. [2020-10-23 20:39:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:39,332 INFO L93 Difference]: Finished difference Result 353 states and 393 transitions. [2020-10-23 20:39:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:39:39,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-23 20:39:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:39,339 INFO L225 Difference]: With dead ends: 353 [2020-10-23 20:39:39,339 INFO L226 Difference]: Without dead ends: 327 [2020-10-23 20:39:39,340 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 20:39:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-23 20:39:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 295. [2020-10-23 20:39:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-23 20:39:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 331 transitions. [2020-10-23 20:39:39,393 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 331 transitions. Word has length 68 [2020-10-23 20:39:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:39,393 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 331 transitions. [2020-10-23 20:39:39,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:39:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 331 transitions. [2020-10-23 20:39:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 20:39:39,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:39,397 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, 1, 1, 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 20:39:39,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:39:39,398 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:39,399 INFO L82 PathProgramCache]: Analyzing trace with hash 41938962, now seen corresponding path program 1 times [2020-10-23 20:39:39,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:39,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303361238] [2020-10-23 20:39:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:39,554 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:39,857 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:39,923 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 20:39:39,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:40,007 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 20:39:40,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:40,076 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 20:39:40,077 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:40,377 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:39:40,400 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 20:39:40,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:40,492 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 20:39:40,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:40,576 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 20:39:40,577 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:40,657 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:40,661 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:40,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:41,020 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 20:39:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303361238] [2020-10-23 20:39:41,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:41,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:39:41,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820178851] [2020-10-23 20:39:41,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:39:41,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:39:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:39:41,028 INFO L87 Difference]: Start difference. First operand 295 states and 331 transitions. Second operand 15 states. [2020-10-23 20:39:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:42,384 INFO L93 Difference]: Finished difference Result 390 states and 433 transitions. [2020-10-23 20:39:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:39:42,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-23 20:39:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:42,390 INFO L225 Difference]: With dead ends: 390 [2020-10-23 20:39:42,390 INFO L226 Difference]: Without dead ends: 375 [2020-10-23 20:39:42,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:39:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-23 20:39:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 311. [2020-10-23 20:39:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-23 20:39:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 348 transitions. [2020-10-23 20:39:42,461 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 348 transitions. Word has length 73 [2020-10-23 20:39:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:42,461 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 348 transitions. [2020-10-23 20:39:42,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:39:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 348 transitions. [2020-10-23 20:39:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 20:39:42,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:42,466 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, 1, 1, 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 20:39:42,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:39:42,466 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1285786464, now seen corresponding path program 1 times [2020-10-23 20:39:42,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:42,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415074902] [2020-10-23 20:39:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:42,615 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:42,909 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:39:42,929 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 20:39:43,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:43,017 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 20:39:43,082 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:43,084 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 20:39:43,085 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:43,362 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:43,375 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 20:39:43,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:43,449 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 20:39:43,504 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:43,505 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 20:39:43,506 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:43,574 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:43,594 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:43,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:43,956 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 20:39:43,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415074902] [2020-10-23 20:39:43,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:43,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:39:43,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230590467] [2020-10-23 20:39:43,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:39:43,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:43,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:39:43,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:39:43,959 INFO L87 Difference]: Start difference. First operand 311 states and 348 transitions. Second operand 15 states. [2020-10-23 20:39:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:45,365 INFO L93 Difference]: Finished difference Result 414 states and 460 transitions. [2020-10-23 20:39:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:39:45,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-23 20:39:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:45,368 INFO L225 Difference]: With dead ends: 414 [2020-10-23 20:39:45,368 INFO L226 Difference]: Without dead ends: 406 [2020-10-23 20:39:45,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:39:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-23 20:39:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 333. [2020-10-23 20:39:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-23 20:39:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 373 transitions. [2020-10-23 20:39:45,407 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 373 transitions. Word has length 73 [2020-10-23 20:39:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:45,408 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 373 transitions. [2020-10-23 20:39:45,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:39:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 373 transitions. [2020-10-23 20:39:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 20:39:45,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:45,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:45,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:39:45,410 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash -287011750, now seen corresponding path program 1 times [2020-10-23 20:39:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:45,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163311356] [2020-10-23 20:39:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:45,547 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:45,812 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:45,836 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 20:39:45,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:45,922 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 20:39:45,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:45,989 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 20:39:45,989 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:46,340 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:39:46,371 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 20:39:46,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:46,465 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 20:39:46,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:46,561 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 20:39:46,562 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:46,682 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:46,685 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:47,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:47,263 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 20:39:47,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163311356] [2020-10-23 20:39:47,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:47,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:39:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385143231] [2020-10-23 20:39:47,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:39:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:39:47,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:39:47,266 INFO L87 Difference]: Start difference. First operand 333 states and 373 transitions. Second operand 17 states. [2020-10-23 20:39:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:49,172 INFO L93 Difference]: Finished difference Result 398 states and 443 transitions. [2020-10-23 20:39:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:39:49,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-23 20:39:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:49,176 INFO L225 Difference]: With dead ends: 398 [2020-10-23 20:39:49,177 INFO L226 Difference]: Without dead ends: 390 [2020-10-23 20:39:49,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:39:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-23 20:39:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 337. [2020-10-23 20:39:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-23 20:39:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 377 transitions. [2020-10-23 20:39:49,244 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 377 transitions. Word has length 79 [2020-10-23 20:39:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:49,244 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 377 transitions. [2020-10-23 20:39:49,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:39:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 377 transitions. [2020-10-23 20:39:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 20:39:49,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:49,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:49,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:39:49,247 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1637564152, now seen corresponding path program 1 times [2020-10-23 20:39:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:49,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116805387] [2020-10-23 20:39:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:49,414 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:49,719 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:39:49,742 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 20:39:49,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:49,825 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 20:39:49,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:49,890 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 20:39:49,890 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:50,160 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:50,179 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 20:39:50,251 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:50,265 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 20:39:50,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:50,333 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 20:39:50,334 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:50,405 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:50,408 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:50,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:50,950 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 20:39:50,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116805387] [2020-10-23 20:39:50,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:39:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960851536] [2020-10-23 20:39:50,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:39:50,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:39:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:39:50,958 INFO L87 Difference]: Start difference. First operand 337 states and 377 transitions. Second operand 17 states. [2020-10-23 20:39:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:52,930 INFO L93 Difference]: Finished difference Result 412 states and 457 transitions. [2020-10-23 20:39:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:39:52,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-23 20:39:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:52,935 INFO L225 Difference]: With dead ends: 412 [2020-10-23 20:39:52,935 INFO L226 Difference]: Without dead ends: 404 [2020-10-23 20:39:52,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:39:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-23 20:39:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 346. [2020-10-23 20:39:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-23 20:39:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 387 transitions. [2020-10-23 20:39:52,977 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 387 transitions. Word has length 79 [2020-10-23 20:39:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:52,977 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 387 transitions. [2020-10-23 20:39:52,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:39:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 387 transitions. [2020-10-23 20:39:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 20:39:52,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:52,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:52,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:39:52,980 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1456338216, now seen corresponding path program 1 times [2020-10-23 20:39:52,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:52,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650448072] [2020-10-23 20:39:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:53,125 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:53,387 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:39:53,408 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 20:39:53,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:53,489 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 20:39:53,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:53,560 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 20:39:53,561 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:53,854 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:53,864 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 20:39:53,936 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:53,941 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 20:39:54,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:54,006 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 20:39:54,006 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:54,114 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:39:54,118 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:54,440 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 20:39:54,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650448072] [2020-10-23 20:39:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:39:54,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819818848] [2020-10-23 20:39:54,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:39:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:54,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:39:54,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:39:54,443 INFO L87 Difference]: Start difference. First operand 346 states and 387 transitions. Second operand 15 states. [2020-10-23 20:39:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:55,800 INFO L93 Difference]: Finished difference Result 429 states and 476 transitions. [2020-10-23 20:39:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 20:39:55,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-10-23 20:39:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:55,805 INFO L225 Difference]: With dead ends: 429 [2020-10-23 20:39:55,805 INFO L226 Difference]: Without dead ends: 408 [2020-10-23 20:39:55,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-10-23 20:39:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-23 20:39:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 346. [2020-10-23 20:39:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-23 20:39:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 386 transitions. [2020-10-23 20:39:55,859 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 386 transitions. Word has length 79 [2020-10-23 20:39:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:55,859 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 386 transitions. [2020-10-23 20:39:55,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:39:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 386 transitions. [2020-10-23 20:39:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 20:39:55,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:55,861 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, 1, 1, 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 20:39:55,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:39:55,861 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2023053233, now seen corresponding path program 2 times [2020-10-23 20:39:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:55,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560350251] [2020-10-23 20:39:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:55,981 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 20:39:55,996 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 20:39:56,258 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:39:56,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:56,260 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 20:39:56,261 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:39:56,506 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:39:56,650 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:39:56,904 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:56,921 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 20:39:56,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:56,995 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 20:39:57,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:57,058 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 20:39:57,059 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:57,332 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:57,341 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 20:39:57,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:57,420 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 20:39:57,485 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:57,487 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 20:39:57,487 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:57,769 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:39:57,786 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 20:39:57,872 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:57,878 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 20:39:57,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:57,942 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 20:39:57,942 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:58,217 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-23 20:39:58,227 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 20:39:58,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:58,299 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 20:39:58,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:39:58,571 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-23 20:39:58,585 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 20:39:58,656 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:58,656 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 20:39:58,657 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:39:58,943 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:58,951 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 20:39:59,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:59,041 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 20:39:59,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:59,111 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 20:39:59,111 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:39:59,427 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:39:59,447 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 20:39:59,517 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:59,523 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 20:39:59,596 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:59,598 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 20:39:59,598 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:39:59,886 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:39:59,902 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 20:39:59,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:39:59,986 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 20:40:00,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:00,056 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 20:40:00,056 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:40:00,227 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:40:00,240 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 20:40:00,253 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 20:40:00,546 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:00,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:00,548 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 20:40:00,548 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:40:00,821 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:01,028 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:01,047 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 20:40:01,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:01,125 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 20:40:01,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:01,194 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 20:40:01,194 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:01,257 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:01,260 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:01,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:01,845 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 20:40:01,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560350251] [2020-10-23 20:40:01,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:01,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:40:01,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334920896] [2020-10-23 20:40:01,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:40:01,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:01,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:40:01,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:40:01,848 INFO L87 Difference]: Start difference. First operand 346 states and 386 transitions. Second operand 22 states. [2020-10-23 20:40:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:04,566 INFO L93 Difference]: Finished difference Result 434 states and 481 transitions. [2020-10-23 20:40:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-23 20:40:04,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-10-23 20:40:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:04,570 INFO L225 Difference]: With dead ends: 434 [2020-10-23 20:40:04,570 INFO L226 Difference]: Without dead ends: 426 [2020-10-23 20:40:04,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 20:40:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-23 20:40:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 371. [2020-10-23 20:40:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-23 20:40:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 413 transitions. [2020-10-23 20:40:04,619 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 413 transitions. Word has length 84 [2020-10-23 20:40:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:04,619 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 413 transitions. [2020-10-23 20:40:04,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:40:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 413 transitions. [2020-10-23 20:40:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 20:40:04,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:04,621 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, 1, 1, 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 20:40:04,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:40:04,622 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1909669795, now seen corresponding path program 1 times [2020-10-23 20:40:04,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:04,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073893653] [2020-10-23 20:40:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:04,762 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:05,013 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:05,021 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 20:40:05,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:05,104 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 20:40:05,168 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:05,169 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 20:40:05,170 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:05,434 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:05,455 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 20:40:05,528 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:05,532 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 20:40:05,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:05,595 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 20:40:05,595 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:05,873 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:40:05,885 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 20:40:05,953 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:05,957 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 20:40:06,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:06,020 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 20:40:06,020 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:06,290 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:06,301 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 20:40:06,370 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:06,375 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 20:40:06,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:06,439 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 20:40:06,440 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:06,526 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:06,528 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:07,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:07,205 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 20:40:07,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073893653] [2020-10-23 20:40:07,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:07,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:40:07,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096604340] [2020-10-23 20:40:07,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:40:07,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:07,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:40:07,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:40:07,208 INFO L87 Difference]: Start difference. First operand 371 states and 413 transitions. Second operand 22 states. [2020-10-23 20:40:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:09,906 INFO L93 Difference]: Finished difference Result 471 states and 522 transitions. [2020-10-23 20:40:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 20:40:09,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-10-23 20:40:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:09,909 INFO L225 Difference]: With dead ends: 471 [2020-10-23 20:40:09,909 INFO L226 Difference]: Without dead ends: 463 [2020-10-23 20:40:09,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 20:40:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-10-23 20:40:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 383. [2020-10-23 20:40:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-23 20:40:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 426 transitions. [2020-10-23 20:40:09,961 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 426 transitions. Word has length 84 [2020-10-23 20:40:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:09,962 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 426 transitions. [2020-10-23 20:40:09,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:40:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 426 transitions. [2020-10-23 20:40:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 20:40:09,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:09,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:09,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:40:09,964 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 938613874, now seen corresponding path program 1 times [2020-10-23 20:40:09,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:09,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032843404] [2020-10-23 20:40:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:10,135 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:10,386 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:10,396 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 20:40:10,463 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:10,466 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 20:40:10,528 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:10,530 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 20:40:10,530 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:10,821 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:10,833 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 20:40:10,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:10,910 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 20:40:10,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:10,973 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 20:40:10,973 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:11,089 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:11,093 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:11,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:11,583 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 20:40:11,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032843404] [2020-10-23 20:40:11,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:11,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:40:11,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849089104] [2020-10-23 20:40:11,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:40:11,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:11,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:40:11,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:40:11,585 INFO L87 Difference]: Start difference. First operand 383 states and 426 transitions. Second operand 17 states. [2020-10-23 20:40:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:13,410 INFO L93 Difference]: Finished difference Result 441 states and 489 transitions. [2020-10-23 20:40:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:40:13,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-10-23 20:40:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:13,413 INFO L225 Difference]: With dead ends: 441 [2020-10-23 20:40:13,413 INFO L226 Difference]: Without dead ends: 424 [2020-10-23 20:40:13,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:40:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-23 20:40:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 385. [2020-10-23 20:40:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-23 20:40:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 428 transitions. [2020-10-23 20:40:13,466 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 428 transitions. Word has length 85 [2020-10-23 20:40:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:13,466 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 428 transitions. [2020-10-23 20:40:13,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:40:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 428 transitions. [2020-10-23 20:40:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 20:40:13,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:13,469 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, 1, 1, 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 20:40:13,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:40:13,469 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash 757387938, now seen corresponding path program 2 times [2020-10-23 20:40:13,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:13,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356184847] [2020-10-23 20:40:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:13,607 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:13,868 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:13,876 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 20:40:13,945 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:13,949 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 20:40:14,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:14,016 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 20:40:14,017 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:14,289 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:14,301 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 20:40:14,374 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:14,378 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 20:40:14,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:14,444 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 20:40:14,445 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:14,678 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:14,681 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:15,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:15,212 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 20:40:15,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356184847] [2020-10-23 20:40:15,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:15,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:40:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077904729] [2020-10-23 20:40:15,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:40:15,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:40:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:40:15,216 INFO L87 Difference]: Start difference. First operand 385 states and 428 transitions. Second operand 17 states. [2020-10-23 20:40:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:16,918 INFO L93 Difference]: Finished difference Result 424 states and 470 transitions. [2020-10-23 20:40:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:40:16,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-10-23 20:40:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:16,921 INFO L225 Difference]: With dead ends: 424 [2020-10-23 20:40:16,921 INFO L226 Difference]: Without dead ends: 392 [2020-10-23 20:40:16,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:40:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-23 20:40:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 374. [2020-10-23 20:40:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-23 20:40:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 416 transitions. [2020-10-23 20:40:16,980 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 416 transitions. Word has length 85 [2020-10-23 20:40:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:16,981 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 416 transitions. [2020-10-23 20:40:16,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:40:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 416 transitions. [2020-10-23 20:40:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 20:40:16,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:16,983 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, 1, 1, 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 20:40:16,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:40:16,983 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash 91480208, now seen corresponding path program 2 times [2020-10-23 20:40:16,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:16,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402592173] [2020-10-23 20:40:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:17,142 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:17,485 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:40:17,499 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 20:40:17,568 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:17,574 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 20:40:17,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:17,638 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 20:40:17,638 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:17,922 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:17,930 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 20:40:17,999 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:18,004 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 20:40:18,064 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:18,065 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 20:40:18,065 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:18,161 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:18,165 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:18,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:18,627 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 20:40:18,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402592173] [2020-10-23 20:40:18,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:18,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:40:18,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322379286] [2020-10-23 20:40:18,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:40:18,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:40:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:40:18,629 INFO L87 Difference]: Start difference. First operand 374 states and 416 transitions. Second operand 17 states. [2020-10-23 20:40:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:20,429 INFO L93 Difference]: Finished difference Result 414 states and 458 transitions. [2020-10-23 20:40:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:40:20,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-10-23 20:40:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:20,433 INFO L225 Difference]: With dead ends: 414 [2020-10-23 20:40:20,433 INFO L226 Difference]: Without dead ends: 386 [2020-10-23 20:40:20,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:40:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-23 20:40:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 362. [2020-10-23 20:40:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-23 20:40:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 403 transitions. [2020-10-23 20:40:20,471 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 403 transitions. Word has length 85 [2020-10-23 20:40:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:20,471 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 403 transitions. [2020-10-23 20:40:20,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:40:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 403 transitions. [2020-10-23 20:40:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:40:20,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:20,473 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, 1, 1, 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 20:40:20,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:40:20,473 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1222429321, now seen corresponding path program 1 times [2020-10-23 20:40:20,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:20,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512187540] [2020-10-23 20:40:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:20,591 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:40:20,601 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 20:40:20,607 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 20:40:20,862 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:20,863 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:20,864 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 20:40:20,864 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:40:21,099 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:21,315 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:21,325 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 20:40:21,393 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:21,397 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 20:40:21,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:21,459 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 20:40:21,459 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:21,744 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:21,753 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 20:40:21,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:21,831 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 20:40:21,898 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:21,899 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 20:40:21,899 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:22,163 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-23 20:40:22,178 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 20:40:22,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:22,278 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 20:40:22,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:40:22,379 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-23 20:40:22,633 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-23 20:40:22,644 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 20:40:22,729 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:22,730 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 20:40:22,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:40:23,052 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:23,067 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 20:40:23,134 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:23,139 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 20:40:23,197 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:23,198 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 20:40:23,199 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:23,430 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:23,692 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:23,709 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 20:40:23,782 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:23,788 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 20:40:23,854 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:23,855 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 20:40:23,856 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:24,137 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:24,151 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 20:40:24,236 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:24,240 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 20:40:24,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:24,322 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 20:40:24,322 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:40:24,603 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:24,612 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 20:40:24,694 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:24,699 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 20:40:24,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:24,762 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 20:40:24,762 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:25,037 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:25,046 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 20:40:25,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:25,136 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 20:40:25,210 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:25,211 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 20:40:25,212 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:40:25,397 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:40:25,411 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 20:40:25,417 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 20:40:25,654 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:25,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:25,656 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 20:40:25,656 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:40:25,920 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:25,924 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:25,927 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:26,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:26,515 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 20:40:26,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512187540] [2020-10-23 20:40:26,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:26,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:40:26,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081962843] [2020-10-23 20:40:26,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:40:26,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:26,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:40:26,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:40:26,518 INFO L87 Difference]: Start difference. First operand 362 states and 403 transitions. Second operand 22 states. [2020-10-23 20:40:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:29,134 INFO L93 Difference]: Finished difference Result 440 states and 487 transitions. [2020-10-23 20:40:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-23 20:40:29,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-23 20:40:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:29,138 INFO L225 Difference]: With dead ends: 440 [2020-10-23 20:40:29,138 INFO L226 Difference]: Without dead ends: 423 [2020-10-23 20:40:29,139 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 20:40:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-23 20:40:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 378. [2020-10-23 20:40:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-23 20:40:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 420 transitions. [2020-10-23 20:40:29,193 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 420 transitions. Word has length 90 [2020-10-23 20:40:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:29,194 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 420 transitions. [2020-10-23 20:40:29,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:40:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 420 transitions. [2020-10-23 20:40:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:40:29,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:29,196 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, 1, 1, 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 20:40:29,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:40:29,196 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1041203385, now seen corresponding path program 3 times [2020-10-23 20:40:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:29,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138245435] [2020-10-23 20:40:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:29,345 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:40:29,362 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 20:40:29,369 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 20:40:29,680 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:29,682 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:29,683 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 20:40:29,683 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:40:29,962 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:30,188 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:30,205 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 20:40:30,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:30,281 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 20:40:30,349 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:30,351 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 20:40:30,351 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:30,635 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:30,647 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 20:40:30,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:30,726 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 20:40:30,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:30,797 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 20:40:30,798 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:31,067 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-23 20:40:31,076 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 20:40:31,168 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:31,170 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 20:40:31,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:40:31,460 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-23 20:40:31,468 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 20:40:31,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:31,543 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 20:40:31,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:153 [2020-10-23 20:40:31,844 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:31,854 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 20:40:31,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:31,935 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 20:40:31,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:31,997 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 20:40:31,998 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:32,214 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:32,477 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:32,485 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 20:40:32,557 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:32,561 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 20:40:32,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:32,629 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 20:40:32,629 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:32,906 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:32,922 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 20:40:33,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:33,006 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 20:40:33,077 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:33,078 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 20:40:33,078 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:40:33,361 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:33,373 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 20:40:33,444 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:33,453 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 20:40:33,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:33,517 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 20:40:33,517 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:33,797 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:33,808 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 20:40:33,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:33,894 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 20:40:33,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:33,971 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 20:40:33,972 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124 [2020-10-23 20:40:34,191 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-23 20:40:34,206 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 20:40:34,214 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 20:40:34,492 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:34,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:34,493 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 20:40:34,494 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:313, output treesize:315 [2020-10-23 20:40:34,763 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-23 20:40:34,766 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:34,769 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:35,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:35,814 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 20:40:35,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138245435] [2020-10-23 20:40:35,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:35,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-10-23 20:40:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161722125] [2020-10-23 20:40:35,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 20:40:35,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 20:40:35,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:40:35,817 INFO L87 Difference]: Start difference. First operand 378 states and 420 transitions. Second operand 25 states. [2020-10-23 20:40:37,226 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-23 20:40:37,907 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-23 20:40:38,077 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-23 20:40:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:39,623 INFO L93 Difference]: Finished difference Result 441 states and 488 transitions. [2020-10-23 20:40:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-23 20:40:39,624 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 90 [2020-10-23 20:40:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:39,627 INFO L225 Difference]: With dead ends: 441 [2020-10-23 20:40:39,628 INFO L226 Difference]: Without dead ends: 426 [2020-10-23 20:40:39,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=490, Invalid=2590, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 20:40:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-23 20:40:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 387. [2020-10-23 20:40:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-23 20:40:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 429 transitions. [2020-10-23 20:40:39,675 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 429 transitions. Word has length 90 [2020-10-23 20:40:39,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:39,675 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 429 transitions. [2020-10-23 20:40:39,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 20:40:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 429 transitions. [2020-10-23 20:40:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:40:39,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:39,677 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, 1, 1, 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 20:40:39,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:40:39,677 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:39,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1635087611, now seen corresponding path program 1 times [2020-10-23 20:40:39,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:39,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267946883] [2020-10-23 20:40:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:39,852 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-23 20:40:40,110 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:40,123 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 20:40:40,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:40,198 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 20:40:40,274 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:40,275 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 20:40:40,275 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:40,588 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-23 20:40:40,604 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 20:40:40,695 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:40,701 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 20:40:40,771 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:40,773 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 20:40:40,773 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:41,105 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-23 20:40:41,115 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 20:40:41,184 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:41,189 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 20:40:41,252 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:41,253 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 20:40:41,253 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:41,525 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-23 20:40:41,532 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 20:40:41,601 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:41,607 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 20:40:41,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:40:41,676 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 20:40:41,677 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-10-23 20:40:41,757 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:41,760 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:40:41,781 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:40:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:40:41,804 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:40:41,857 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:40:41,858 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:40:41,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:40:41,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:40:41 BoogieIcfgContainer [2020-10-23 20:40:41,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:40:41,884 INFO L168 Benchmark]: Toolchain (without parser) took 70238.44 ms. Allocated memory was 156.2 MB in the beginning and 390.1 MB in the end (delta: 233.8 MB). Free memory was 138.1 MB in the beginning and 206.9 MB in the end (delta: -68.8 MB). Peak memory consumption was 164.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:40:41,885 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:40:41,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.21 ms. Allocated memory is still 156.2 MB. Free memory was 137.5 MB in the beginning and 127.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:40:41,885 INFO L168 Benchmark]: Boogie Preprocessor took 120.25 ms. Allocated memory is still 156.2 MB. Free memory was 127.5 MB in the beginning and 124.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:40:41,886 INFO L168 Benchmark]: RCFGBuilder took 971.40 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 124.1 MB in the beginning and 138.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:40:41,886 INFO L168 Benchmark]: TraceAbstraction took 68435.79 ms. Allocated memory was 187.7 MB in the beginning and 390.1 MB in the end (delta: 202.4 MB). Free memory was 138.2 MB in the beginning and 206.9 MB in the end (delta: -68.7 MB). Peak memory consumption was 133.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:40:41,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 698.21 ms. Allocated memory is still 156.2 MB. Free memory was 137.5 MB in the beginning and 127.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 120.25 ms. Allocated memory is still 156.2 MB. Free memory was 127.5 MB in the beginning and 124.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 971.40 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 124.1 MB in the beginning and 138.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68435.79 ms. Allocated memory was 187.7 MB in the beginning and 390.1 MB in the end (delta: 202.4 MB). Free memory was 138.2 MB in the beginning and 206.9 MB in the end (delta: -68.7 MB). Peak memory consumption was 133.7 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: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L620] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_and_tree_cnstr-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 68.3s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 28.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3345 SDtfs, 5932 SDslu, 27385 SDs, 0 SdLazy, 12467 SolverSat, 783 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 548 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 484 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 16.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=387occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 879 StatesRemovedByMinimization, 17 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...