/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:09:58,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:09:58,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:09:58,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:09:58,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:09:58,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:09:58,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:09:58,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:09:58,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:09:58,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:09:58,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:09:58,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:09:58,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:09:58,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:09:58,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:09:58,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:09:58,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:09:58,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:09:58,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:09:58,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:09:58,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:09:58,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:09:58,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:09:58,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:09:58,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:09:58,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:09:58,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:09:58,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:09:58,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:09:58,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:09:58,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:09:58,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:09:58,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:09:58,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:09:58,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:09:58,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:09:58,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:09:58,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:09:58,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:09:58,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:09:58,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:09:58,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:09:58,621 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:09:58,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:09:58,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:09:58,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:09:58,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:09:58,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:09:58,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:09:58,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:09:58,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:09:58,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:09:58,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:09:58,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:09:58,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:09:58,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:09:58,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:09:58,626 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:09:58,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:09:58,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:09:58,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:09:58,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:09:58,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:09:58,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:09:58,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:09:58,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:09:59,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:09:59,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:09:59,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:09:59,029 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:09:59,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2021-02-23 18:09:59,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c841b4483/1054c20bef784a63bee905946cb9c7e5/FLAG27adcffd0 [2021-02-23 18:09:59,879 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:09:59,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2021-02-23 18:09:59,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c841b4483/1054c20bef784a63bee905946cb9c7e5/FLAG27adcffd0 [2021-02-23 18:10:00,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c841b4483/1054c20bef784a63bee905946cb9c7e5 [2021-02-23 18:10:00,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:10:00,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:10:00,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:10:00,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:10:00,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:10:00,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef67864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00, skipping insertion in model container [2021-02-23 18:10:00,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:10:00,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:10:00,626 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-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-02-23 18:10:00,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:10:00,643 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:10:00,692 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-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-02-23 18:10:00,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:10:00,763 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:10:00,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00 WrapperNode [2021-02-23 18:10:00,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:10:00,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:10:00,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:10:00,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:10:00,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (1/1) ... [2021-02-23 18:10:00,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:10:00,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:10:00,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:10:00,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:10:00,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (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 [2021-02-23 18:10:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:10:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:10:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:10:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 18:10:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 18:10:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 18:10:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:10:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:10:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:10:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:10:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:10:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:10:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:10:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:10:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 18:10:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 18:10:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 18:10:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 18:10:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 18:10:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 18:10:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 18:10:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 18:10:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 18:10:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 18:10:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 18:10:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 18:10:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 18:10:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 18:10:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 18:10:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 18:10:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 18:10:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 18:10:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 18:10:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 18:10:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 18:10:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 18:10:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 18:10:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 18:10:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 18:10:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 18:10:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 18:10:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 18:10:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 18:10:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 18:10:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 18:10:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 18:10:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 18:10:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 18:10:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 18:10:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 18:10:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 18:10:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 18:10:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 18:10:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:10:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 18:10:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 18:10:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 18:10:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 18:10:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 18:10:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 18:10:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 18:10:01,024 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 18:10:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 18:10:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 18:10:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 18:10:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 18:10:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 18:10:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 18:10:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 18:10:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 18:10:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:10:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:10:01,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:10:01,469 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 18:10:01,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:10:01,933 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-23 18:10:01,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:01 BoogieIcfgContainer [2021-02-23 18:10:01,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:10:01,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:10:01,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:10:01,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:10:01,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:10:00" (1/3) ... [2021-02-23 18:10:01,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb92ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:01, skipping insertion in model container [2021-02-23 18:10:01,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:00" (2/3) ... [2021-02-23 18:10:01,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb92ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:01, skipping insertion in model container [2021-02-23 18:10:01,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:01" (3/3) ... [2021-02-23 18:10:01,945 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2021-02-23 18:10:01,952 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:10:01,958 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:10:01,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:10:02,004 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:10:02,005 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:10:02,005 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:10:02,005 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:10:02,005 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:10:02,005 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:10:02,006 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:10:02,006 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:10:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states. [2021-02-23 18:10:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 18:10:02,040 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:02,041 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] [2021-02-23 18:10:02,041 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash 119990243, now seen corresponding path program 1 times [2021-02-23 18:10:02,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:02,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681321045] [2021-02-23 18:10:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:02,146 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:02,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:02,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:02,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:02,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:02,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:02,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:02,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:02,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681321045] [2021-02-23 18:10:02,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:02,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:10:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311131413] [2021-02-23 18:10:02,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:10:02,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:10:02,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:10:02,424 INFO L87 Difference]: Start difference. First operand 182 states. Second operand 3 states. [2021-02-23 18:10:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:02,846 INFO L93 Difference]: Finished difference Result 347 states and 405 transitions. [2021-02-23 18:10:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:10:02,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-23 18:10:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:02,859 INFO L225 Difference]: With dead ends: 347 [2021-02-23 18:10:02,860 INFO L226 Difference]: Without dead ends: 170 [2021-02-23 18:10:02,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:10:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-23 18:10:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-02-23 18:10:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-02-23 18:10:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2021-02-23 18:10:02,926 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 35 [2021-02-23 18:10:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:02,927 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2021-02-23 18:10:02,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:10:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2021-02-23 18:10:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 18:10:02,930 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:02,930 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] [2021-02-23 18:10:02,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:10:02,931 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash 391291352, now seen corresponding path program 1 times [2021-02-23 18:10:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:02,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477014115] [2021-02-23 18:10:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:02,937 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:03,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:03,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:03,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:03,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:03,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:03,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477014115] [2021-02-23 18:10:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:03,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:10:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252078564] [2021-02-23 18:10:03,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:10:03,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:03,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:10:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:10:03,155 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand 5 states. [2021-02-23 18:10:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:03,553 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2021-02-23 18:10:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:10:03,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-02-23 18:10:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:03,558 INFO L225 Difference]: With dead ends: 255 [2021-02-23 18:10:03,558 INFO L226 Difference]: Without dead ends: 205 [2021-02-23 18:10:03,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:10:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-23 18:10:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-02-23 18:10:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-02-23 18:10:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 226 transitions. [2021-02-23 18:10:03,589 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 226 transitions. Word has length 45 [2021-02-23 18:10:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:03,590 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 226 transitions. [2021-02-23 18:10:03,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:10:03,590 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 226 transitions. [2021-02-23 18:10:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 18:10:03,593 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:03,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:03,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:10:03,594 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash -148109217, now seen corresponding path program 1 times [2021-02-23 18:10:03,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:03,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797228589] [2021-02-23 18:10:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:03,616 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:03,620 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:03,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:03,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:10:03,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:03,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:03,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:03,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:10:03,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:03,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:03,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:03,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:03,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797228589] [2021-02-23 18:10:03,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:03,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:03,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643354048] [2021-02-23 18:10:03,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:03,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:03,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:03,857 INFO L87 Difference]: Start difference. First operand 204 states and 226 transitions. Second operand 7 states. [2021-02-23 18:10:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:04,533 INFO L93 Difference]: Finished difference Result 534 states and 600 transitions. [2021-02-23 18:10:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:10:04,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2021-02-23 18:10:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:04,537 INFO L225 Difference]: With dead ends: 534 [2021-02-23 18:10:04,537 INFO L226 Difference]: Without dead ends: 415 [2021-02-23 18:10:04,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-02-23 18:10:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 288. [2021-02-23 18:10:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2021-02-23 18:10:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 323 transitions. [2021-02-23 18:10:04,588 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 323 transitions. Word has length 58 [2021-02-23 18:10:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:04,589 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 323 transitions. [2021-02-23 18:10:04,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 323 transitions. [2021-02-23 18:10:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 18:10:04,591 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:04,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:04,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:10:04,592 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1210876604, now seen corresponding path program 1 times [2021-02-23 18:10:04,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:04,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208708202] [2021-02-23 18:10:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:04,626 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:04,630 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:04,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:04,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:04,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:04,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:04,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:04,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:04,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:04,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:04,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208708202] [2021-02-23 18:10:04,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:04,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500963809] [2021-02-23 18:10:04,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:04,775 INFO L87 Difference]: Start difference. First operand 288 states and 323 transitions. Second operand 7 states. [2021-02-23 18:10:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:05,255 INFO L93 Difference]: Finished difference Result 365 states and 405 transitions. [2021-02-23 18:10:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 18:10:05,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2021-02-23 18:10:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:05,258 INFO L225 Difference]: With dead ends: 365 [2021-02-23 18:10:05,259 INFO L226 Difference]: Without dead ends: 359 [2021-02-23 18:10:05,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:10:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-02-23 18:10:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 301. [2021-02-23 18:10:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-02-23 18:10:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 339 transitions. [2021-02-23 18:10:05,294 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 339 transitions. Word has length 60 [2021-02-23 18:10:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:05,295 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 339 transitions. [2021-02-23 18:10:05,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 339 transitions. [2021-02-23 18:10:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-23 18:10:05,297 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:05,297 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:05,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:10:05,298 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:05,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1932040588, now seen corresponding path program 1 times [2021-02-23 18:10:05,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:05,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890617575] [2021-02-23 18:10:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:05,319 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:05,323 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:05,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:05,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:05,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:05,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:05,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:05,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:05,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:05,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:05,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:05,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890617575] [2021-02-23 18:10:05,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:05,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433694047] [2021-02-23 18:10:05,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:05,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:05,482 INFO L87 Difference]: Start difference. First operand 301 states and 339 transitions. Second operand 7 states. [2021-02-23 18:10:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:06,003 INFO L93 Difference]: Finished difference Result 368 states and 408 transitions. [2021-02-23 18:10:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 18:10:06,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2021-02-23 18:10:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:06,007 INFO L225 Difference]: With dead ends: 368 [2021-02-23 18:10:06,007 INFO L226 Difference]: Without dead ends: 353 [2021-02-23 18:10:06,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:10:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-02-23 18:10:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 298. [2021-02-23 18:10:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2021-02-23 18:10:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2021-02-23 18:10:06,048 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 66 [2021-02-23 18:10:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:06,051 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2021-02-23 18:10:06,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2021-02-23 18:10:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-23 18:10:06,056 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:06,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:06,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:10:06,056 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash -895358812, now seen corresponding path program 1 times [2021-02-23 18:10:06,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:06,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800859240] [2021-02-23 18:10:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:06,080 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:06,084 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:06,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:06,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:06,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:06,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:06,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:06,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:06,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:06,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:06,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800859240] [2021-02-23 18:10:06,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:06,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:06,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300833957] [2021-02-23 18:10:06,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:06,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:06,269 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand 7 states. [2021-02-23 18:10:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:06,744 INFO L93 Difference]: Finished difference Result 350 states and 389 transitions. [2021-02-23 18:10:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:10:06,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2021-02-23 18:10:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:06,746 INFO L225 Difference]: With dead ends: 350 [2021-02-23 18:10:06,746 INFO L226 Difference]: Without dead ends: 326 [2021-02-23 18:10:06,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:10:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-02-23 18:10:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 293. [2021-02-23 18:10:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2021-02-23 18:10:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 329 transitions. [2021-02-23 18:10:06,781 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 329 transitions. Word has length 66 [2021-02-23 18:10:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:06,781 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 329 transitions. [2021-02-23 18:10:06,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 329 transitions. [2021-02-23 18:10:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 18:10:06,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:06,784 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:06,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:10:06,784 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1730428090, now seen corresponding path program 1 times [2021-02-23 18:10:06,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:06,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54414229] [2021-02-23 18:10:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:06,805 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:06,809 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:06,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:06,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:06,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:06,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:06,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:06,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:10:06,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:06,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:10:07,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 18:10:07,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:07,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:07,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:07,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:07,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:07,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:07,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:07,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:07,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54414229] [2021-02-23 18:10:07,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:07,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 18:10:07,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534267335] [2021-02-23 18:10:07,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 18:10:07,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 18:10:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:10:07,185 INFO L87 Difference]: Start difference. First operand 293 states and 329 transitions. Second operand 15 states. [2021-02-23 18:10:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:08,278 INFO L93 Difference]: Finished difference Result 375 states and 415 transitions. [2021-02-23 18:10:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 18:10:08,279 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-02-23 18:10:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:08,281 INFO L225 Difference]: With dead ends: 375 [2021-02-23 18:10:08,282 INFO L226 Difference]: Without dead ends: 362 [2021-02-23 18:10:08,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-02-23 18:10:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-23 18:10:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 309. [2021-02-23 18:10:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2021-02-23 18:10:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 346 transitions. [2021-02-23 18:10:08,337 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 346 transitions. Word has length 71 [2021-02-23 18:10:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:08,337 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 346 transitions. [2021-02-23 18:10:08,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 18:10:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 346 transitions. [2021-02-23 18:10:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 18:10:08,339 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:08,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:08,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:10:08,340 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -864922744, now seen corresponding path program 1 times [2021-02-23 18:10:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:08,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464974750] [2021-02-23 18:10:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:08,355 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:08,358 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:08,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:08,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:08,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:08,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:08,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:08,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:10:08,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:10:08,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 18:10:08,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:08,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:08,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:08,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:08,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:08,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:08,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:08,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:08,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464974750] [2021-02-23 18:10:08,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:08,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 18:10:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693113830] [2021-02-23 18:10:08,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 18:10:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:08,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 18:10:08,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:10:08,641 INFO L87 Difference]: Start difference. First operand 309 states and 346 transitions. Second operand 15 states. [2021-02-23 18:10:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:09,763 INFO L93 Difference]: Finished difference Result 391 states and 433 transitions. [2021-02-23 18:10:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 18:10:09,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-02-23 18:10:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:09,767 INFO L225 Difference]: With dead ends: 391 [2021-02-23 18:10:09,767 INFO L226 Difference]: Without dead ends: 385 [2021-02-23 18:10:09,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-02-23 18:10:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-02-23 18:10:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 331. [2021-02-23 18:10:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-23 18:10:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 371 transitions. [2021-02-23 18:10:09,820 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 371 transitions. Word has length 71 [2021-02-23 18:10:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:09,820 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 371 transitions. [2021-02-23 18:10:09,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 18:10:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 371 transitions. [2021-02-23 18:10:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 18:10:09,822 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:09,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:09,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:10:09,822 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1905896482, now seen corresponding path program 1 times [2021-02-23 18:10:09,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:09,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473953502] [2021-02-23 18:10:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:09,837 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:09,840 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:09,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:09,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:09,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:09,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:09,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:09,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:09,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:09,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:09,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:09,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:09,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:09,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:09,985 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 18:10:09,986 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 18:10:10,001 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:10,002 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:10,017 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:10,018 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:10,034 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 18:10:10,035 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 18:10:10,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:10,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:10,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:10,135 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 18:10:10,136 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 18:10:10,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:10,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:10,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:10,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:10,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:10,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:10,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:10,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473953502] [2021-02-23 18:10:10,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:10,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:10:10,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466215562] [2021-02-23 18:10:10,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:10:10,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:10,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:10:10,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:10:10,371 INFO L87 Difference]: Start difference. First operand 331 states and 371 transitions. Second operand 18 states. [2021-02-23 18:10:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:12,033 INFO L93 Difference]: Finished difference Result 396 states and 439 transitions. [2021-02-23 18:10:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:10:12,033 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2021-02-23 18:10:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:12,037 INFO L225 Difference]: With dead ends: 396 [2021-02-23 18:10:12,037 INFO L226 Difference]: Without dead ends: 390 [2021-02-23 18:10:12,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 18:10:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-02-23 18:10:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 335. [2021-02-23 18:10:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2021-02-23 18:10:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2021-02-23 18:10:12,086 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 77 [2021-02-23 18:10:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:12,087 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2021-02-23 18:10:12,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:10:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2021-02-23 18:10:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 18:10:12,091 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:12,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:12,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 18:10:12,092 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1090022976, now seen corresponding path program 1 times [2021-02-23 18:10:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:12,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123692403] [2021-02-23 18:10:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:12,108 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:12,112 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:12,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:12,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:12,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:12,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:12,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:12,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:12,278 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 18:10:12,280 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 18:10:12,295 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:12,295 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:12,315 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:12,316 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:12,338 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 18:10:12,342 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 18:10:12,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:12,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:12,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:12,428 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 18:10:12,429 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 18:10:12,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:12,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:12,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:12,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:12,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:12,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:12,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123692403] [2021-02-23 18:10:12,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:12,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:10:12,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440123649] [2021-02-23 18:10:12,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:10:12,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:10:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:10:12,614 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand 18 states. [2021-02-23 18:10:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:14,335 INFO L93 Difference]: Finished difference Result 410 states and 453 transitions. [2021-02-23 18:10:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:10:14,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2021-02-23 18:10:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:14,341 INFO L225 Difference]: With dead ends: 410 [2021-02-23 18:10:14,342 INFO L226 Difference]: Without dead ends: 404 [2021-02-23 18:10:14,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 18:10:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-02-23 18:10:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 344. [2021-02-23 18:10:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2021-02-23 18:10:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 385 transitions. [2021-02-23 18:10:14,391 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 385 transitions. Word has length 77 [2021-02-23 18:10:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:14,391 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 385 transitions. [2021-02-23 18:10:14,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:10:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 385 transitions. [2021-02-23 18:10:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 18:10:14,393 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:14,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:14,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 18:10:14,393 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2126704752, now seen corresponding path program 1 times [2021-02-23 18:10:14,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:14,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102206650] [2021-02-23 18:10:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:14,407 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:14,410 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:14,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:14,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:14,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:14,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:14,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:14,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:10:14,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:10:14,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 18:10:14,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:10:14,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:14,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:14,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:14,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:14,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:14,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:14,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:14,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102206650] [2021-02-23 18:10:14,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:14,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 18:10:14,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794212460] [2021-02-23 18:10:14,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 18:10:14,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:14,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 18:10:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:10:14,680 INFO L87 Difference]: Start difference. First operand 344 states and 385 transitions. Second operand 15 states. [2021-02-23 18:10:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:15,846 INFO L93 Difference]: Finished difference Result 406 states and 449 transitions. [2021-02-23 18:10:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 18:10:15,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2021-02-23 18:10:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:15,851 INFO L225 Difference]: With dead ends: 406 [2021-02-23 18:10:15,851 INFO L226 Difference]: Without dead ends: 387 [2021-02-23 18:10:15,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-02-23 18:10:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-02-23 18:10:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 344. [2021-02-23 18:10:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2021-02-23 18:10:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 384 transitions. [2021-02-23 18:10:15,899 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 384 transitions. Word has length 77 [2021-02-23 18:10:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:15,899 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 384 transitions. [2021-02-23 18:10:15,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 18:10:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 384 transitions. [2021-02-23 18:10:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 18:10:15,901 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:15,901 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:15,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 18:10:15,902 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:15,902 INFO L82 PathProgramCache]: Analyzing trace with hash 445708284, now seen corresponding path program 2 times [2021-02-23 18:10:15,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:15,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444726774] [2021-02-23 18:10:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:15,920 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:15,923 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:16,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:16,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:16,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:16,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:16,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:10:16,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:10:16,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:10:16,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 18:10:16,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:16,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:16,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 18:10:16,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:16,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:16,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:16,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:16,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:16,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:16,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:16,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444726774] [2021-02-23 18:10:16,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:16,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 18:10:16,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300856474] [2021-02-23 18:10:16,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 18:10:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:16,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 18:10:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 18:10:16,558 INFO L87 Difference]: Start difference. First operand 344 states and 384 transitions. Second operand 22 states. [2021-02-23 18:10:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:19,251 INFO L93 Difference]: Finished difference Result 425 states and 469 transitions. [2021-02-23 18:10:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-23 18:10:19,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2021-02-23 18:10:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:19,254 INFO L225 Difference]: With dead ends: 425 [2021-02-23 18:10:19,254 INFO L226 Difference]: Without dead ends: 419 [2021-02-23 18:10:19,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=530, Invalid=2226, Unknown=0, NotChecked=0, Total=2756 [2021-02-23 18:10:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-02-23 18:10:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 358. [2021-02-23 18:10:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2021-02-23 18:10:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 399 transitions. [2021-02-23 18:10:19,314 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 399 transitions. Word has length 82 [2021-02-23 18:10:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:19,314 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 399 transitions. [2021-02-23 18:10:19,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 18:10:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 399 transitions. [2021-02-23 18:10:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 18:10:19,316 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:19,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:19,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 18:10:19,317 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:19,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1840002158, now seen corresponding path program 1 times [2021-02-23 18:10:19,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:19,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619655872] [2021-02-23 18:10:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:19,330 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:19,333 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:19,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:19,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:19,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:19,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:19,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:10:19,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:10:19,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:10:19,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 18:10:19,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:19,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:19,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 18:10:19,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:19,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:19,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:19,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:19,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:19,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:19,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:19,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619655872] [2021-02-23 18:10:19,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:19,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 18:10:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300074286] [2021-02-23 18:10:19,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 18:10:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 18:10:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 18:10:19,922 INFO L87 Difference]: Start difference. First operand 358 states and 399 transitions. Second operand 22 states. [2021-02-23 18:10:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:22,763 INFO L93 Difference]: Finished difference Result 459 states and 506 transitions. [2021-02-23 18:10:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-23 18:10:22,764 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2021-02-23 18:10:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:22,767 INFO L225 Difference]: With dead ends: 459 [2021-02-23 18:10:22,767 INFO L226 Difference]: Without dead ends: 453 [2021-02-23 18:10:22,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=545, Invalid=2317, Unknown=0, NotChecked=0, Total=2862 [2021-02-23 18:10:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-02-23 18:10:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 370. [2021-02-23 18:10:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2021-02-23 18:10:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 412 transitions. [2021-02-23 18:10:22,818 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 412 transitions. Word has length 82 [2021-02-23 18:10:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:22,819 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 412 transitions. [2021-02-23 18:10:22,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 18:10:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 412 transitions. [2021-02-23 18:10:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 18:10:22,821 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:22,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:22,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 18:10:22,821 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash 599616346, now seen corresponding path program 1 times [2021-02-23 18:10:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:22,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384156752] [2021-02-23 18:10:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:22,835 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:22,837 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:22,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:22,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:22,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:22,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:22,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:22,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:22,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:22,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:22,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:22,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:22,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:22,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:22,930 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 18:10:22,931 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 18:10:22,949 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:22,952 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:22,968 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:22,969 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:22,985 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 18:10:22,986 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 18:10:23,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:23,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:23,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:23,067 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 18:10:23,068 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 18:10:23,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:23,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:23,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:23,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:23,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:23,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:23,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:23,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384156752] [2021-02-23 18:10:23,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:23,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:10:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645718323] [2021-02-23 18:10:23,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:10:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:10:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:10:23,220 INFO L87 Difference]: Start difference. First operand 370 states and 412 transitions. Second operand 18 states. [2021-02-23 18:10:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:24,975 INFO L93 Difference]: Finished difference Result 436 states and 481 transitions. [2021-02-23 18:10:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:10:24,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2021-02-23 18:10:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:24,978 INFO L225 Difference]: With dead ends: 436 [2021-02-23 18:10:24,978 INFO L226 Difference]: Without dead ends: 421 [2021-02-23 18:10:24,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 18:10:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-02-23 18:10:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 372. [2021-02-23 18:10:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2021-02-23 18:10:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 414 transitions. [2021-02-23 18:10:25,035 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 414 transitions. Word has length 83 [2021-02-23 18:10:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:25,035 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 414 transitions. [2021-02-23 18:10:25,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:10:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 414 transitions. [2021-02-23 18:10:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 18:10:25,037 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:25,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:25,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 18:10:25,038 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:25,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1636298122, now seen corresponding path program 2 times [2021-02-23 18:10:25,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:25,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89453409] [2021-02-23 18:10:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:25,052 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:25,055 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:25,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:25,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:25,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:25,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:25,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:25,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:25,141 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 18:10:25,142 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 18:10:25,155 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:25,156 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:25,170 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:25,170 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:25,185 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 18:10:25,185 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 18:10:25,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:25,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:25,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:25,262 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 18:10:25,262 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 18:10:25,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:25,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:25,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:25,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:25,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:25,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:25,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89453409] [2021-02-23 18:10:25,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:25,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:10:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841608820] [2021-02-23 18:10:25,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:10:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:10:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:10:25,417 INFO L87 Difference]: Start difference. First operand 372 states and 414 transitions. Second operand 18 states. [2021-02-23 18:10:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:27,027 INFO L93 Difference]: Finished difference Result 418 states and 462 transitions. [2021-02-23 18:10:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:10:27,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2021-02-23 18:10:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:27,030 INFO L225 Difference]: With dead ends: 418 [2021-02-23 18:10:27,030 INFO L226 Difference]: Without dead ends: 388 [2021-02-23 18:10:27,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 18:10:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-02-23 18:10:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 361. [2021-02-23 18:10:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-23 18:10:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 402 transitions. [2021-02-23 18:10:27,079 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 402 transitions. Word has length 83 [2021-02-23 18:10:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:27,079 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 402 transitions. [2021-02-23 18:10:27,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:10:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 402 transitions. [2021-02-23 18:10:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 18:10:27,081 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:27,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:27,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 18:10:27,081 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash 545103608, now seen corresponding path program 2 times [2021-02-23 18:10:27,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:27,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789163707] [2021-02-23 18:10:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:27,093 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:27,096 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:27,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:27,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:27,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:27,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:27,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:27,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:27,190 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 18:10:27,191 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 18:10:27,204 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:27,205 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:27,222 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 18:10:27,223 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 18:10:27,239 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 18:10:27,240 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 18:10:27,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:27,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:27,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:10:27,318 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 18:10:27,319 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 18:10:27,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:27,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:27,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:27,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:27,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:27,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:27,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:27,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789163707] [2021-02-23 18:10:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:10:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259929908] [2021-02-23 18:10:27,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:10:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:10:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:10:27,463 INFO L87 Difference]: Start difference. First operand 361 states and 402 transitions. Second operand 18 states. [2021-02-23 18:10:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:29,151 INFO L93 Difference]: Finished difference Result 400 states and 442 transitions. [2021-02-23 18:10:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:10:29,152 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2021-02-23 18:10:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:29,154 INFO L225 Difference]: With dead ends: 400 [2021-02-23 18:10:29,154 INFO L226 Difference]: Without dead ends: 374 [2021-02-23 18:10:29,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 18:10:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-02-23 18:10:29,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 347. [2021-02-23 18:10:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2021-02-23 18:10:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 387 transitions. [2021-02-23 18:10:29,201 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 387 transitions. Word has length 83 [2021-02-23 18:10:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:29,201 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 387 transitions. [2021-02-23 18:10:29,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:10:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 387 transitions. [2021-02-23 18:10:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 18:10:29,203 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:29,203 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:29,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 18:10:29,203 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1994320820, now seen corresponding path program 1 times [2021-02-23 18:10:29,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:29,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047986988] [2021-02-23 18:10:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:29,217 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:29,220 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:29,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:29,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:29,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:29,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:10:29,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:10:29,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:10:29,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:10:29,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 18:10:29,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:10:29,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:29,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 18:10:29,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:10:29,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:10:29,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:29,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:29,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:29,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:29,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:29,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:29,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047986988] [2021-02-23 18:10:29,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:29,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 18:10:29,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973394134] [2021-02-23 18:10:29,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 18:10:29,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 18:10:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 18:10:29,751 INFO L87 Difference]: Start difference. First operand 347 states and 387 transitions. Second operand 22 states. [2021-02-23 18:10:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:32,142 INFO L93 Difference]: Finished difference Result 425 states and 469 transitions. [2021-02-23 18:10:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-23 18:10:32,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2021-02-23 18:10:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:32,144 INFO L225 Difference]: With dead ends: 425 [2021-02-23 18:10:32,144 INFO L226 Difference]: Without dead ends: 410 [2021-02-23 18:10:32,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-02-23 18:10:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-23 18:10:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 365. [2021-02-23 18:10:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2021-02-23 18:10:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 406 transitions. [2021-02-23 18:10:32,195 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 406 transitions. Word has length 88 [2021-02-23 18:10:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:32,195 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 406 transitions. [2021-02-23 18:10:32,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 18:10:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 406 transitions. [2021-02-23 18:10:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 18:10:32,197 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:32,197 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:32,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 18:10:32,198 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1263964700, now seen corresponding path program 3 times [2021-02-23 18:10:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:32,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648787099] [2021-02-23 18:10:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:32,211 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:32,214 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:32,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:32,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:32,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:32,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:32,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:32,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:32,321 WARN L141 QuantifierPusher]: treesize reduction 18, result has 45.5 percent of original size [2021-02-23 18:10:32,322 WARN L147 QuantifierPusher]: treesize reduction 18, result has 45.5 percent of original size 15 [2021-02-23 18:10:32,336 WARN L141 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-02-23 18:10:32,336 WARN L147 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size 19 [2021-02-23 18:10:32,353 WARN L141 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-02-23 18:10:32,353 WARN L147 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size 19 [2021-02-23 18:10:32,374 WARN L141 QuantifierPusher]: treesize reduction 18, result has 63.3 percent of original size [2021-02-23 18:10:32,375 WARN L147 QuantifierPusher]: treesize reduction 18, result has 63.3 percent of original size 31 [2021-02-23 18:10:32,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:10:32,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:10:32,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 18:10:32,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 18:10:32,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-02-23 18:10:32,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-23 18:10:32,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 18:10:32,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 18:10:32,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:10:32,730 WARN L141 QuantifierPusher]: treesize reduction 8, result has 79.5 percent of original size [2021-02-23 18:10:32,731 WARN L147 QuantifierPusher]: treesize reduction 8, result has 79.5 percent of original size 31 [2021-02-23 18:10:32,772 WARN L141 QuantifierPusher]: treesize reduction 8, result has 77.1 percent of original size [2021-02-23 18:10:32,777 WARN L147 QuantifierPusher]: treesize reduction 8, result has 77.1 percent of original size 27 [2021-02-23 18:10:32,819 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 18:10:32,820 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 18:10:32,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:32,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:32,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:32,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:32,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:33,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:33,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:33,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:33,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648787099] [2021-02-23 18:10:33,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:33,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-02-23 18:10:33,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259719143] [2021-02-23 18:10:33,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-23 18:10:33,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-23 18:10:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-02-23 18:10:33,072 INFO L87 Difference]: Start difference. First operand 365 states and 406 transitions. Second operand 26 states. [2021-02-23 18:10:34,767 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-02-23 18:10:34,939 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-23 18:10:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:36,293 INFO L93 Difference]: Finished difference Result 429 states and 473 transitions. [2021-02-23 18:10:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-23 18:10:36,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2021-02-23 18:10:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:36,296 INFO L225 Difference]: With dead ends: 429 [2021-02-23 18:10:36,296 INFO L226 Difference]: Without dead ends: 416 [2021-02-23 18:10:36,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=558, Invalid=2748, Unknown=0, NotChecked=0, Total=3306 [2021-02-23 18:10:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-02-23 18:10:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 371. [2021-02-23 18:10:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2021-02-23 18:10:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 412 transitions. [2021-02-23 18:10:36,373 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 412 transitions. Word has length 88 [2021-02-23 18:10:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:36,373 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 412 transitions. [2021-02-23 18:10:36,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-23 18:10:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 412 transitions. [2021-02-23 18:10:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 18:10:36,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:36,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:10:36,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 18:10:36,376 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1310952102, now seen corresponding path program 1 times [2021-02-23 18:10:36,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:36,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141483065] [2021-02-23 18:10:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:36,389 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:36,394 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:10:36,423 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:10:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:10:36,472 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:10:36,548 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:10:36,548 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:10:36,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 18:10:36,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:10:36 BoogieIcfgContainer [2021-02-23 18:10:36,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:10:36,588 INFO L168 Benchmark]: Toolchain (without parser) took 36424.91 ms. Allocated memory was 159.4 MB in the beginning and 399.5 MB in the end (delta: 240.1 MB). Free memory was 141.8 MB in the beginning and 356.1 MB in the end (delta: -214.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:36,588 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:10:36,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 585.30 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 118.2 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:36,589 INFO L168 Benchmark]: Boogie Preprocessor took 132.50 ms. Allocated memory is still 159.4 MB. Free memory was 118.2 MB in the beginning and 140.3 MB in the end (delta: -22.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:36,589 INFO L168 Benchmark]: RCFGBuilder took 1036.37 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 140.3 MB in the beginning and 157.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:36,589 INFO L168 Benchmark]: TraceAbstraction took 34650.37 ms. Allocated memory was 191.9 MB in the beginning and 399.5 MB in the end (delta: 207.6 MB). Free memory was 157.1 MB in the beginning and 356.1 MB in the end (delta: -199.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:36,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 585.30 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 118.2 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 132.50 ms. Allocated memory is still 159.4 MB. Free memory was 118.2 MB in the beginning and 140.3 MB in the end (delta: -22.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1036.37 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 140.3 MB in the beginning and 157.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34650.37 ms. Allocated memory was 191.9 MB in the beginning and 399.5 MB in the end (delta: 207.6 MB). Free memory was 157.1 MB in the beginning and 356.1 MB in the end (delta: -199.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 620]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L620] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34.5s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 26.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3252 SDtfs, 7261 SDslu, 26851 SDs, 0 SdLazy, 11991 SolverSat, 815 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 564 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=372occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 876 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...