/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-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:42:29,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:42:29,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:42:29,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:42:29,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:42:29,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:42:29,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:42:29,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:42:29,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:42:29,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:42:29,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:42:29,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:42:29,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:42:29,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:42:29,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:42:29,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:42:29,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:42:29,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:42:29,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:42:29,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:42:29,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:42:29,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:42:29,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:42:29,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:42:29,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:42:29,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:42:29,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:42:29,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:42:29,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:42:29,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:42:29,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:42:29,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:42:29,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:42:29,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:42:29,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:42:29,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:42:29,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:42:29,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:42:29,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:42:29,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:42:29,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:42:29,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:42:29,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:42:29,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:42:29,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:42:29,837 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:42:29,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:42:29,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:42:29,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:42:29,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:42:29,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:42:29,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:42:29,839 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:42:29,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:42:29,839 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:42:29,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:42:29,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:42:29,840 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:42:29,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:42:29,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:42:29,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:42:29,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:42:29,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:42:29,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:42:29,842 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:42:30,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:42:30,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:42:30,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:42:30,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:42:30,261 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:42:30,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2021-02-21 20:42:30,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245e5a0f8/178580bc9abe4475a14b768dbe006217/FLAGa8b4cf595 [2021-02-21 20:42:31,191 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:42:31,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2021-02-21 20:42:31,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245e5a0f8/178580bc9abe4475a14b768dbe006217/FLAGa8b4cf595 [2021-02-21 20:42:31,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245e5a0f8/178580bc9abe4475a14b768dbe006217 [2021-02-21 20:42:31,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:42:31,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:42:31,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:42:31,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:42:31,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:42:31,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:42:31" (1/1) ... [2021-02-21 20:42:31,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128bdd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:31, skipping insertion in model container [2021-02-21 20:42:31,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:42:31" (1/1) ... [2021-02-21 20:42:31,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:42:31,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:42:32,016 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-02-21 20:42:32,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:42:32,038 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:42:32,126 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-02-21 20:42:32,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:42:32,231 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:42:32,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32 WrapperNode [2021-02-21 20:42:32,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:42:32,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:42:32,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:42:32,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:42:32,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (1/1) ... [2021-02-21 20:42:32,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:42:32,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:42:32,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:42:32,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:42:32,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (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 [2021-02-21 20:42:32,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:42:32,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:42:32,524 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:42:32,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 20:42:32,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 20:42:32,525 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-21 20:42:32,525 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-02-21 20:42:32,525 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-02-21 20:42:32,526 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-02-21 20:42:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:42:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:42:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:42:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 20:42:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 20:42:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:42:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:42:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:42:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 20:42:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 20:42:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 20:42:32,535 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 20:42:32,535 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 20:42:32,535 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 20:42:32,535 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 20:42:32,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 20:42:32,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 20:42:32,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 20:42:32,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 20:42:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 20:42:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 20:42:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 20:42:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 20:42:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 20:42:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 20:42:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 20:42:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 20:42:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 20:42:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 20:42:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 20:42:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 20:42:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 20:42:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 20:42:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 20:42:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 20:42:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 20:42:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 20:42:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 20:42:32,540 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 20:42:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 20:42:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 20:42:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 20:42:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 20:42:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 20:42:32,541 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 20:42:32,542 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 20:42:32,542 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 20:42:32,542 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 20:42:32,542 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 20:42:32,542 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 20:42:32,543 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 20:42:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 20:42:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 20:42:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 20:42:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 20:42:32,544 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 20:42:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 20:42:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 20:42:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 20:42:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 20:42:32,545 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:42:32,546 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:42:32,546 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 20:42:32,546 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:42:32,547 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 20:42:32,547 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 20:42:32,547 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 20:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 20:42:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 20:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 20:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 20:42:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 20:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 20:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 20:42:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 20:42:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 20:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 20:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 20:42:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 20:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 20:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 20:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 20:42:32,553 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 20:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 20:42:32,554 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 20:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 20:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 20:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 20:42:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 20:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 20:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 20:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 20:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 20:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 20:42:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 20:42:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 20:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 20:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 20:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 20:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 20:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 20:42:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 20:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 20:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 20:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 20:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 20:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-21 20:42:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-02-21 20:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:42:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-02-21 20:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-02-21 20:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:42:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:42:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:42:33,127 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-21 20:42:33,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:42:33,343 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-21 20:42:33,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:42:33 BoogieIcfgContainer [2021-02-21 20:42:33,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:42:33,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:42:33,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:42:33,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:42:33,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:42:31" (1/3) ... [2021-02-21 20:42:33,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c10745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:42:33, skipping insertion in model container [2021-02-21 20:42:33,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:32" (2/3) ... [2021-02-21 20:42:33,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c10745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:42:33, skipping insertion in model container [2021-02-21 20:42:33,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:42:33" (3/3) ... [2021-02-21 20:42:33,357 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-02-21 20:42:33,364 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:42:33,370 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:42:33,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:42:33,418 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:42:33,419 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:42:33,419 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:42:33,419 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:42:33,419 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:42:33,419 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:42:33,420 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:42:33,420 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:42:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2021-02-21 20:42:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-21 20:42:33,449 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:33,450 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] [2021-02-21 20:42:33,451 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash -280906633, now seen corresponding path program 1 times [2021-02-21 20:42:33,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:33,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326809691] [2021-02-21 20:42:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:33,558 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:42:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-21 20:42:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:33,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326809691] [2021-02-21 20:42:33,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:33,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:42:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476951315] [2021-02-21 20:42:33,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:42:33,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:42:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:42:33,848 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 4 states. [2021-02-21 20:42:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:34,356 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-02-21 20:42:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:42:34,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2021-02-21 20:42:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:34,397 INFO L225 Difference]: With dead ends: 159 [2021-02-21 20:42:34,399 INFO L226 Difference]: Without dead ends: 72 [2021-02-21 20:42:34,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:42:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-21 20:42:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-02-21 20:42:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 20:42:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-02-21 20:42:34,501 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2021-02-21 20:42:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:34,501 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-02-21 20:42:34,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:42:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-02-21 20:42:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 20:42:34,503 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:34,504 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] [2021-02-21 20:42:34,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:42:34,504 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1331532656, now seen corresponding path program 1 times [2021-02-21 20:42:34,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:34,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172313060] [2021-02-21 20:42:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:34,512 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:34,606 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-21 20:42:34,607 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-21 20:42:34,617 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-21 20:42:34,618 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-21 20:42:34,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-21 20:42:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-21 20:42:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:34,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172313060] [2021-02-21 20:42:34,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:34,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:42:34,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244011251] [2021-02-21 20:42:34,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:42:34,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:42:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:42:34,731 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 6 states. [2021-02-21 20:42:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:35,469 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-02-21 20:42:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:42:35,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2021-02-21 20:42:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:35,473 INFO L225 Difference]: With dead ends: 147 [2021-02-21 20:42:35,473 INFO L226 Difference]: Without dead ends: 100 [2021-02-21 20:42:35,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:42:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-21 20:42:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2021-02-21 20:42:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-21 20:42:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-02-21 20:42:35,494 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 37 [2021-02-21 20:42:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:35,495 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-02-21 20:42:35,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:42:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-02-21 20:42:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 20:42:35,496 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:35,497 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] [2021-02-21 20:42:35,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:42:35,497 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2056387251, now seen corresponding path program 1 times [2021-02-21 20:42:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:35,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420677382] [2021-02-21 20:42:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:35,504 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,570 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-21 20:42:35,571 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-21 20:42:35,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-21 20:42:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:35,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:35,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:42:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:35,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420677382] [2021-02-21 20:42:35,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:35,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:42:35,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634993380] [2021-02-21 20:42:35,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:42:35,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:42:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:42:35,791 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 7 states. [2021-02-21 20:42:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:36,447 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2021-02-21 20:42:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:42:36,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2021-02-21 20:42:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:36,450 INFO L225 Difference]: With dead ends: 118 [2021-02-21 20:42:36,451 INFO L226 Difference]: Without dead ends: 98 [2021-02-21 20:42:36,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:42:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-21 20:42:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2021-02-21 20:42:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 20:42:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-21 20:42:36,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 39 [2021-02-21 20:42:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:36,473 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-21 20:42:36,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:42:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-21 20:42:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 20:42:36,476 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:36,476 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] [2021-02-21 20:42:36,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:42:36,477 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash 320013449, now seen corresponding path program 1 times [2021-02-21 20:42:36,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:36,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412150762] [2021-02-21 20:42:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:36,514 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:36,518 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:36,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:36,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:36,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:36,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:36,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-21 20:42:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:36,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-02-21 20:42:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:36,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:36,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412150762] [2021-02-21 20:42:36,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:36,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:42:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054914669] [2021-02-21 20:42:36,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:42:36,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:42:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:42:36,717 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 8 states. [2021-02-21 20:42:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:37,722 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2021-02-21 20:42:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:42:37,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2021-02-21 20:42:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:37,730 INFO L225 Difference]: With dead ends: 172 [2021-02-21 20:42:37,731 INFO L226 Difference]: Without dead ends: 121 [2021-02-21 20:42:37,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:42:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-21 20:42:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-02-21 20:42:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-21 20:42:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-02-21 20:42:37,788 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 47 [2021-02-21 20:42:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:37,789 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-02-21 20:42:37,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:42:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-02-21 20:42:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 20:42:37,796 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:37,796 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] [2021-02-21 20:42:37,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:42:37,803 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1313506211, now seen corresponding path program 1 times [2021-02-21 20:42:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:37,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979511034] [2021-02-21 20:42:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:37,828 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:37,836 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:37,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:37,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:37,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:37,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:37,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:37,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:37,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-21 20:42:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:38,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:38,026 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:42:38,028 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:42:38,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:42:38,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:42:38,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:42:38,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-21 20:42:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:38,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:38,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979511034] [2021-02-21 20:42:38,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:38,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:42:38,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209112982] [2021-02-21 20:42:38,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:42:38,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:42:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:42:38,231 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 12 states. [2021-02-21 20:42:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:39,243 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-02-21 20:42:39,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:42:39,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2021-02-21 20:42:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:39,247 INFO L225 Difference]: With dead ends: 105 [2021-02-21 20:42:39,247 INFO L226 Difference]: Without dead ends: 100 [2021-02-21 20:42:39,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:42:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-21 20:42:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-02-21 20:42:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-21 20:42:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2021-02-21 20:42:39,273 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 48 [2021-02-21 20:42:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:39,274 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2021-02-21 20:42:39,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:42:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2021-02-21 20:42:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 20:42:39,275 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:39,276 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 20:42:39,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:42:39,276 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 54294636, now seen corresponding path program 1 times [2021-02-21 20:42:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:39,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766475439] [2021-02-21 20:42:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:39,285 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:39,289 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:39,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:39,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:39,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:39,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:39,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:39,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:39,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:39,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:42:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:39,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:39,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-02-21 20:42:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:39,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:39,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766475439] [2021-02-21 20:42:39,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:39,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:42:39,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158158118] [2021-02-21 20:42:39,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:42:39,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:42:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:42:39,460 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand 9 states. [2021-02-21 20:42:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:40,419 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-02-21 20:42:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:42:40,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-02-21 20:42:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:40,423 INFO L225 Difference]: With dead ends: 147 [2021-02-21 20:42:40,423 INFO L226 Difference]: Without dead ends: 123 [2021-02-21 20:42:40,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:42:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-21 20:42:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2021-02-21 20:42:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-21 20:42:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-02-21 20:42:40,449 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 49 [2021-02-21 20:42:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:40,449 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-02-21 20:42:40,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:42:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-02-21 20:42:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-21 20:42:40,451 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:40,451 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] [2021-02-21 20:42:40,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:42:40,452 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1599784741, now seen corresponding path program 1 times [2021-02-21 20:42:40,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:40,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543689565] [2021-02-21 20:42:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:40,467 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:40,471 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:40,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:40,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:40,511 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-21 20:42:40,512 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-21 20:42:40,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:40,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:40,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:40,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-21 20:42:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:40,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:40,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:40,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:40,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:40,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-21 20:42:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:40,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:40,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:40,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543689565] [2021-02-21 20:42:40,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:40,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:42:40,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975507877] [2021-02-21 20:42:40,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:42:40,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:42:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:42:40,663 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 9 states. [2021-02-21 20:42:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:41,406 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2021-02-21 20:42:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:42:41,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2021-02-21 20:42:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:41,408 INFO L225 Difference]: With dead ends: 147 [2021-02-21 20:42:41,408 INFO L226 Difference]: Without dead ends: 123 [2021-02-21 20:42:41,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:42:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-21 20:42:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2021-02-21 20:42:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-21 20:42:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-02-21 20:42:41,436 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 55 [2021-02-21 20:42:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:41,436 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-02-21 20:42:41,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:42:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-02-21 20:42:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 20:42:41,438 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:41,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:41,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:42:41,439 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash -513492670, now seen corresponding path program 2 times [2021-02-21 20:42:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:41,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353740564] [2021-02-21 20:42:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:41,452 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:41,455 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:41,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:41,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:41,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:41,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:41,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-21 20:42:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-21 20:42:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:41,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353740564] [2021-02-21 20:42:41,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:41,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:42:41,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418859134] [2021-02-21 20:42:41,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:42:41,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:42:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:42:41,681 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 10 states. [2021-02-21 20:42:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:42,969 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2021-02-21 20:42:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 20:42:42,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2021-02-21 20:42:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:42,972 INFO L225 Difference]: With dead ends: 227 [2021-02-21 20:42:42,972 INFO L226 Difference]: Without dead ends: 157 [2021-02-21 20:42:42,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-02-21 20:42:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-21 20:42:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-02-21 20:42:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-02-21 20:42:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2021-02-21 20:42:43,000 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 57 [2021-02-21 20:42:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:43,000 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2021-02-21 20:42:43,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:42:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2021-02-21 20:42:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-21 20:42:43,002 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:43,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:43,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:42:43,003 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2081168667, now seen corresponding path program 2 times [2021-02-21 20:42:43,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:43,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770976654] [2021-02-21 20:42:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:43,028 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:43,031 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:43,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:43,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:43,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:43,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:43,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:43,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:43,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:43,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:43,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:43,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-21 20:42:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:43,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:43,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:43,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-21 20:42:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:43,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:43,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:43,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770976654] [2021-02-21 20:42:43,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:43,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:42:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283217697] [2021-02-21 20:42:43,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:42:43,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:42:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:42:43,238 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand 11 states. [2021-02-21 20:42:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:44,518 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-02-21 20:42:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 20:42:44,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2021-02-21 20:42:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:44,521 INFO L225 Difference]: With dead ends: 147 [2021-02-21 20:42:44,521 INFO L226 Difference]: Without dead ends: 117 [2021-02-21 20:42:44,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-02-21 20:42:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-21 20:42:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2021-02-21 20:42:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-02-21 20:42:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-02-21 20:42:44,543 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 59 [2021-02-21 20:42:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:44,544 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-02-21 20:42:44,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:42:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-02-21 20:42:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-21 20:42:44,545 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:44,545 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 20:42:44,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:42:44,546 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:44,546 INFO L82 PathProgramCache]: Analyzing trace with hash 438940879, now seen corresponding path program 2 times [2021-02-21 20:42:44,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:44,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549751578] [2021-02-21 20:42:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:44,566 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:44,569 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:44,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:44,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:42:44,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:42:44,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:44,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:44,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-21 20:42:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:44,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:44,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:44,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:44,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:44,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:44,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:42:44,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:42:44,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:42:44,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-21 20:42:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:44,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:44,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:44,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:44,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:44,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549751578] [2021-02-21 20:42:45,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:45,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 20:42:45,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083161978] [2021-02-21 20:42:45,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 20:42:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 20:42:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:42:45,015 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 17 states. [2021-02-21 20:42:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:46,688 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-02-21 20:42:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 20:42:46,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2021-02-21 20:42:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:46,691 INFO L225 Difference]: With dead ends: 131 [2021-02-21 20:42:46,691 INFO L226 Difference]: Without dead ends: 126 [2021-02-21 20:42:46,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 20:42:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-21 20:42:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2021-02-21 20:42:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-21 20:42:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-02-21 20:42:46,714 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 64 [2021-02-21 20:42:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:46,714 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-02-21 20:42:46,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 20:42:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-02-21 20:42:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-21 20:42:46,715 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:46,715 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 20:42:46,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:42:46,716 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1876118818, now seen corresponding path program 1 times [2021-02-21 20:42:46,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:46,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391291268] [2021-02-21 20:42:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:46,725 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:46,728 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:46,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:46,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:46,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:46,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:46,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:46,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:46,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:46,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:42:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:46,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:46,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:46,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:46,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:46,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-21 20:42:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:46,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:46,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391291268] [2021-02-21 20:42:46,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:46,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:42:46,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257171534] [2021-02-21 20:42:46,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:42:46,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:42:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:42:46,964 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 11 states. [2021-02-21 20:42:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:48,030 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2021-02-21 20:42:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 20:42:48,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-21 20:42:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:48,033 INFO L225 Difference]: With dead ends: 168 [2021-02-21 20:42:48,034 INFO L226 Difference]: Without dead ends: 137 [2021-02-21 20:42:48,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:42:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-21 20:42:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2021-02-21 20:42:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-21 20:42:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-02-21 20:42:48,069 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 65 [2021-02-21 20:42:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:48,070 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-02-21 20:42:48,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:42:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-02-21 20:42:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-21 20:42:48,073 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:48,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-02-21 20:42:48,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 20:42:48,073 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:48,074 INFO L82 PathProgramCache]: Analyzing trace with hash -797078925, now seen corresponding path program 3 times [2021-02-21 20:42:48,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:48,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955886309] [2021-02-21 20:42:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:48,093 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:48,096 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:48,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:48,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:48,133 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-21 20:42:48,134 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-21 20:42:48,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:48,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:48,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:48,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-21 20:42:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:48,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:48,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:48,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:48,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:48,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:48,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:48,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-21 20:42:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:48,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:48,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:48,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955886309] [2021-02-21 20:42:48,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:48,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:42:48,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495539341] [2021-02-21 20:42:48,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:42:48,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:42:48,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:42:48,332 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 11 states. [2021-02-21 20:42:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:49,135 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-02-21 20:42:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 20:42:49,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2021-02-21 20:42:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:49,140 INFO L225 Difference]: With dead ends: 172 [2021-02-21 20:42:49,141 INFO L226 Difference]: Without dead ends: 141 [2021-02-21 20:42:49,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:42:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-21 20:42:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2021-02-21 20:42:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-02-21 20:42:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2021-02-21 20:42:49,169 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 71 [2021-02-21 20:42:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:49,170 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2021-02-21 20:42:49,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:42:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2021-02-21 20:42:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-21 20:42:49,171 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:49,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:49,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 20:42:49,172 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash 958008151, now seen corresponding path program 2 times [2021-02-21 20:42:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:49,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280730502] [2021-02-21 20:42:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:49,196 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:49,199 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:49,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:49,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:49,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:49,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:49,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:49,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-21 20:42:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:49,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:49,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:49,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-02-21 20:42:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:49,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:49,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:49,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280730502] [2021-02-21 20:42:49,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:49,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 20:42:49,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873144534] [2021-02-21 20:42:49,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 20:42:49,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:49,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 20:42:49,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:42:49,462 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand 13 states. [2021-02-21 20:42:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:50,923 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-02-21 20:42:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-21 20:42:50,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2021-02-21 20:42:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:50,925 INFO L225 Difference]: With dead ends: 170 [2021-02-21 20:42:50,926 INFO L226 Difference]: Without dead ends: 133 [2021-02-21 20:42:50,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-02-21 20:42:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-21 20:42:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-02-21 20:42:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-02-21 20:42:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2021-02-21 20:42:50,950 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 75 [2021-02-21 20:42:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:50,951 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2021-02-21 20:42:50,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 20:42:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2021-02-21 20:42:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-21 20:42:50,952 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:50,952 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-21 20:42:50,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 20:42:50,952 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash 44033053, now seen corresponding path program 4 times [2021-02-21 20:42:50,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:50,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919939930] [2021-02-21 20:42:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:50,976 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:50,979 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:51,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:51,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:51,029 WARN L141 QuantifierPusher]: treesize reduction 8, result has 71.4 percent of original size [2021-02-21 20:42:51,031 WARN L147 QuantifierPusher]: treesize reduction 8, result has 71.4 percent of original size 20 [2021-02-21 20:42:51,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:51,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:51,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:51,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-21 20:42:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:51,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:51,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-02-21 20:42:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:51,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:51,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:51,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:51,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:51,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:51,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:51,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:51,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:51,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919939930] [2021-02-21 20:42:51,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:51,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:42:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181683743] [2021-02-21 20:42:51,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:42:51,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:42:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:42:51,318 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 12 states. [2021-02-21 20:42:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:52,707 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2021-02-21 20:42:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:42:52,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2021-02-21 20:42:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:52,710 INFO L225 Difference]: With dead ends: 139 [2021-02-21 20:42:52,710 INFO L226 Difference]: Without dead ends: 134 [2021-02-21 20:42:52,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-21 20:42:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-21 20:42:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2021-02-21 20:42:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-02-21 20:42:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2021-02-21 20:42:52,738 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 80 [2021-02-21 20:42:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:52,738 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2021-02-21 20:42:52,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:42:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2021-02-21 20:42:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-02-21 20:42:52,740 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:52,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-02-21 20:42:52,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 20:42:52,740 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:52,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2027611180, now seen corresponding path program 3 times [2021-02-21 20:42:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:52,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609389256] [2021-02-21 20:42:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:52,748 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:52,750 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:52,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:52,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:52,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:52,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:52,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:52,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:52,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:52,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-21 20:42:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:52,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:52,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:52,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:52,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:52,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:52,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:52,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:52,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-21 20:42:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:53,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:53,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:53,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609389256] [2021-02-21 20:42:53,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:53,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 20:42:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611957249] [2021-02-21 20:42:53,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 20:42:53,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 20:42:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:42:53,013 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand 13 states. [2021-02-21 20:42:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:54,297 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2021-02-21 20:42:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 20:42:54,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2021-02-21 20:42:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:54,300 INFO L225 Difference]: With dead ends: 188 [2021-02-21 20:42:54,300 INFO L226 Difference]: Without dead ends: 150 [2021-02-21 20:42:54,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-02-21 20:42:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-02-21 20:42:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-02-21 20:42:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-02-21 20:42:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2021-02-21 20:42:54,338 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 81 [2021-02-21 20:42:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:54,338 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2021-02-21 20:42:54,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 20:42:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2021-02-21 20:42:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-21 20:42:54,339 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:54,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:54,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 20:42:54,340 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1793054875, now seen corresponding path program 5 times [2021-02-21 20:42:54,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:54,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982813180] [2021-02-21 20:42:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:54,366 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:54,370 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:42:54,409 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:42:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:42:54,435 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:42:54,491 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:42:54,491 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:42:54,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 20:42:54,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:42:54 BoogieIcfgContainer [2021-02-21 20:42:54,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:42:54,528 INFO L168 Benchmark]: Toolchain (without parser) took 23128.13 ms. Allocated memory was 164.6 MB in the beginning and 286.3 MB in the end (delta: 121.6 MB). Free memory was 139.9 MB in the beginning and 137.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 125.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:54,528 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 164.6 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:42:54,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 818.23 ms. Allocated memory is still 164.6 MB. Free memory was 138.7 MB in the beginning and 146.9 MB in the end (delta: -8.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:54,533 INFO L168 Benchmark]: Boogie Preprocessor took 138.93 ms. Allocated memory is still 164.6 MB. Free memory was 146.9 MB in the beginning and 144.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:54,533 INFO L168 Benchmark]: RCFGBuilder took 969.93 ms. Allocated memory is still 164.6 MB. Free memory was 144.4 MB in the beginning and 99.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:54,533 INFO L168 Benchmark]: TraceAbstraction took 21178.57 ms. Allocated memory was 164.6 MB in the beginning and 286.3 MB in the end (delta: 121.6 MB). Free memory was 99.3 MB in the beginning and 137.8 MB in the end (delta: -38.4 MB). Peak memory consumption was 84.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:54,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 164.6 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 818.23 ms. Allocated memory is still 164.6 MB. Free memory was 138.7 MB in the beginning and 146.9 MB in the end (delta: -8.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 138.93 ms. Allocated memory is still 164.6 MB. Free memory was 146.9 MB in the beginning and 144.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 969.93 ms. Allocated memory is still 164.6 MB. Free memory was 144.4 MB in the beginning and 99.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21178.57 ms. Allocated memory was 164.6 MB in the beginning and 286.3 MB in the end (delta: 121.6 MB). Free memory was 99.3 MB in the beginning and 137.8 MB in the end (delta: -38.4 MB). Peak memory consumption was 84.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L603] int len = 2; [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) [L575] SLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND FALSE !(len > 0) [L585] return head; [L607] RET, EXPR sll_create(len + 1) [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) [L588] int len = 0; [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) [L593] return len; [L608] RET, EXPR sll_length(s) [L608] COND TRUE len != sll_length(s) [L613] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.0s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1003 SDtfs, 2208 SDslu, 2677 SDs, 0 SdLazy, 5277 SolverSat, 359 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 353 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 360 StatesRemovedByMinimization, 15 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...