/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/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:52:08,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:52:08,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:52:08,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:52:08,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:52:08,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:52:08,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:52:08,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:52:08,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:52:08,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:52:08,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:52:08,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:52:08,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:52:08,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:52:08,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:52:08,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:52:08,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:52:08,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:52:08,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:52:08,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:52:08,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:52:08,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:52:08,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:52:08,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:52:08,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:52:08,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:52:08,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:52:08,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:52:08,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:52:08,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:52:08,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:52:08,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:52:08,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:52:08,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:52:08,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:52:08,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:52:08,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:52:08,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:52:08,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:52:08,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:52:08,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:52:08,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:52:08,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:52:08,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:52:08,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:52:08,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:52:08,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:52:08,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:52:08,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:52:08,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:52:08,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:52:08,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:52:08,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:52:08,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:52:08,426 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:52:08,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:52:08,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:52:08,427 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:52:08,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:52:08,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:52:08,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:52:08,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:52:08,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:52:08,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:52:08,428 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:52:08,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:52:08,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:52:08,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:52:08,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:52:08,892 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:52:08,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-11-07 00:52:08,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5425bb2/66078a00f9f14d90850fb7765ace974f/FLAGed1339ead [2020-11-07 00:52:09,632 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:52:09,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-11-07 00:52:09,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5425bb2/66078a00f9f14d90850fb7765ace974f/FLAGed1339ead [2020-11-07 00:52:09,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5425bb2/66078a00f9f14d90850fb7765ace974f [2020-11-07 00:52:09,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:52:09,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:52:09,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:52:09,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:52:09,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:52:09,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:52:09" (1/1) ... [2020-11-07 00:52:09,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e96dde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:09, skipping insertion in model container [2020-11-07 00:52:09,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:52:09" (1/1) ... [2020-11-07 00:52:09,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:52:10,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:52:10,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:52:10,351 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:52:10,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:52:10,496 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:52:10,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10 WrapperNode [2020-11-07 00:52:10,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:52:10,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:52:10,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:52:10,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:52:10,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... [2020-11-07 00:52:10,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:52:10,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:52:10,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:52:10,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:52:10,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:52:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:52:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:52:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:52:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-11-07 00:52:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-11-07 00:52:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-11-07 00:52:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-11-07 00:52:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-11-07 00:52:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:52:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:52:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:52:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:52:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:52:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-11-07 00:52:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-11-07 00:52:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-11-07 00:52:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-11-07 00:52:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-11-07 00:52:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-11-07 00:52:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-11-07 00:52:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-11-07 00:52:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-11-07 00:52:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-11-07 00:52:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-11-07 00:52:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-11-07 00:52:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-11-07 00:52:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-11-07 00:52:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-11-07 00:52:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-11-07 00:52:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-11-07 00:52:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-11-07 00:52:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-11-07 00:52:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-11-07 00:52:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-11-07 00:52:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-11-07 00:52:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-11-07 00:52:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-11-07 00:52:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-11-07 00:52:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-11-07 00:52:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-11-07 00:52:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-11-07 00:52:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-11-07 00:52:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-11-07 00:52:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-11-07 00:52:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-11-07 00:52:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-11-07 00:52:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-11-07 00:52:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-11-07 00:52:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-11-07 00:52:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-11-07 00:52:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-11-07 00:52:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-11-07 00:52:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-11-07 00:52:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-11-07 00:52:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-11-07 00:52:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-11-07 00:52:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-11-07 00:52:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-11-07 00:52:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-11-07 00:52:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-11-07 00:52:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-11-07 00:52:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-11-07 00:52:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-11-07 00:52:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-11-07 00:52:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-11-07 00:52:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-11-07 00:52:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-11-07 00:52:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-11-07 00:52:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-11-07 00:52:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-11-07 00:52:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-11-07 00:52:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-11-07 00:52:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-11-07 00:52:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-11-07 00:52:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-11-07 00:52:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-11-07 00:52:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-11-07 00:52:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-11-07 00:52:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-11-07 00:52:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-11-07 00:52:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-11-07 00:52:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-11-07 00:52:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-11-07 00:52:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-11-07 00:52:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-11-07 00:52:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-11-07 00:52:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-11-07 00:52:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-11-07 00:52:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-11-07 00:52:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-11-07 00:52:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-11-07 00:52:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-11-07 00:52:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-11-07 00:52:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-11-07 00:52:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-11-07 00:52:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-11-07 00:52:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-11-07 00:52:10,707 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-11-07 00:52:10,708 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-11-07 00:52:10,708 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-11-07 00:52:10,708 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-11-07 00:52:10,708 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-11-07 00:52:10,708 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-11-07 00:52:10,708 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:52:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:52:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 00:52:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:52:10,709 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 00:52:10,710 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-11-07 00:52:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 00:52:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-11-07 00:52:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-11-07 00:52:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-11-07 00:52:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-11-07 00:52:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-11-07 00:52:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:52:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-11-07 00:52:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-11-07 00:52:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-11-07 00:52:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-11-07 00:52:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:52:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:52:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:52:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-11-07 00:52:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:52:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:52:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:52:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:52:10,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:52:10,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:52:11,432 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:52:11,432 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:52:11,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:52:11 BoogieIcfgContainer [2020-11-07 00:52:11,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:52:11,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:52:11,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:52:11,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:52:11,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:52:09" (1/3) ... [2020-11-07 00:52:11,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eb7162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:52:11, skipping insertion in model container [2020-11-07 00:52:11,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:10" (2/3) ... [2020-11-07 00:52:11,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eb7162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:52:11, skipping insertion in model container [2020-11-07 00:52:11,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:52:11" (3/3) ... [2020-11-07 00:52:11,444 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-11-07 00:52:11,459 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:52:11,463 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:52:11,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:52:11,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:52:11,502 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:52:11,503 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:52:11,503 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:52:11,503 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:52:11,503 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:52:11,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:52:11,503 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:52:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-11-07 00:52:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 00:52:11,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:11,531 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] [2020-11-07 00:52:11,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1653385351, now seen corresponding path program 1 times [2020-11-07 00:52:11,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:11,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131935646] [2020-11-07 00:52:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:11,637 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:11,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131935646] [2020-11-07 00:52:11,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:11,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:52:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253651017] [2020-11-07 00:52:11,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:52:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:52:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:52:11,951 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 7 states. [2020-11-07 00:52:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:12,530 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2020-11-07 00:52:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:52:12,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-11-07 00:52:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:12,544 INFO L225 Difference]: With dead ends: 138 [2020-11-07 00:52:12,544 INFO L226 Difference]: Without dead ends: 73 [2020-11-07 00:52:12,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:52:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-07 00:52:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-11-07 00:52:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 00:52:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-11-07 00:52:12,610 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 27 [2020-11-07 00:52:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:12,611 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-11-07 00:52:12,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:52:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-11-07 00:52:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 00:52:12,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:12,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:12,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:52:12,615 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash 818741348, now seen corresponding path program 1 times [2020-11-07 00:52:12,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:12,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518664761] [2020-11-07 00:52:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:12,624 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:12,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:12,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:12,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:12,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:12,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 00:52:13,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518664761] [2020-11-07 00:52:13,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:13,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:52:13,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806819653] [2020-11-07 00:52:13,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:52:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:52:13,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:52:13,034 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 9 states. [2020-11-07 00:52:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:13,387 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2020-11-07 00:52:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:52:13,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-11-07 00:52:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:13,390 INFO L225 Difference]: With dead ends: 106 [2020-11-07 00:52:13,390 INFO L226 Difference]: Without dead ends: 79 [2020-11-07 00:52:13,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:52:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-07 00:52:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-11-07 00:52:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-07 00:52:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-11-07 00:52:13,413 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 67 [2020-11-07 00:52:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:13,414 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-11-07 00:52:13,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:52:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-11-07 00:52:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 00:52:13,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:13,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:13,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:52:13,417 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -645962233, now seen corresponding path program 1 times [2020-11-07 00:52:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:13,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469307403] [2020-11-07 00:52:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:13,424 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 00:52:13,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469307403] [2020-11-07 00:52:13,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:13,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:52:13,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460254814] [2020-11-07 00:52:13,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:52:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:52:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:52:13,687 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 9 states. [2020-11-07 00:52:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:14,018 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-11-07 00:52:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:52:14,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-11-07 00:52:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:14,021 INFO L225 Difference]: With dead ends: 109 [2020-11-07 00:52:14,021 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 00:52:14,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:52:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 00:52:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-11-07 00:52:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 00:52:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-11-07 00:52:14,039 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 67 [2020-11-07 00:52:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:14,040 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-11-07 00:52:14,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:52:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-11-07 00:52:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 00:52:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:14,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:14,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:52:14,043 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1821270998, now seen corresponding path program 1 times [2020-11-07 00:52:14,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:14,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478522732] [2020-11-07 00:52:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:14,049 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:14,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:14,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:14,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:14,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:14,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 00:52:14,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478522732] [2020-11-07 00:52:14,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:14,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:52:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729428537] [2020-11-07 00:52:14,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:52:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:52:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:52:14,578 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 17 states. [2020-11-07 00:52:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:16,160 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-11-07 00:52:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:52:16,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-11-07 00:52:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:16,165 INFO L225 Difference]: With dead ends: 116 [2020-11-07 00:52:16,165 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 00:52:16,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:52:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 00:52:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-11-07 00:52:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 00:52:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-11-07 00:52:16,197 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 67 [2020-11-07 00:52:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:16,197 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-11-07 00:52:16,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:52:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-11-07 00:52:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-07 00:52:16,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:16,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:16,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:52:16,200 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1472109846, now seen corresponding path program 1 times [2020-11-07 00:52:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:16,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227732836] [2020-11-07 00:52:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:16,205 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-07 00:52:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:52:16,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227732836] [2020-11-07 00:52:16,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:16,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:52:16,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098528951] [2020-11-07 00:52:16,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:52:16,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:52:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:52:16,701 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 18 states. [2020-11-07 00:52:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:18,108 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-11-07 00:52:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:52:18,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-11-07 00:52:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:18,111 INFO L225 Difference]: With dead ends: 120 [2020-11-07 00:52:18,111 INFO L226 Difference]: Without dead ends: 110 [2020-11-07 00:52:18,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:52:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-07 00:52:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-11-07 00:52:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-07 00:52:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2020-11-07 00:52:18,144 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 76 [2020-11-07 00:52:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:18,145 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2020-11-07 00:52:18,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:52:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2020-11-07 00:52:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 00:52:18,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:18,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:18,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:52:18,147 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:18,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2079566711, now seen corresponding path program 1 times [2020-11-07 00:52:18,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:18,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417297004] [2020-11-07 00:52:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:18,152 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-07 00:52:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:52:18,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417297004] [2020-11-07 00:52:18,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:18,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:52:18,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579424895] [2020-11-07 00:52:18,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:52:18,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:18,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:52:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:52:18,697 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 23 states. [2020-11-07 00:52:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:20,709 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2020-11-07 00:52:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:52:20,711 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-11-07 00:52:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:20,713 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:52:20,714 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 00:52:20,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:52:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 00:52:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-11-07 00:52:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-07 00:52:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-11-07 00:52:20,749 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 77 [2020-11-07 00:52:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:20,749 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-11-07 00:52:20,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:52:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-11-07 00:52:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 00:52:20,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:20,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:20,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:52:20,752 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1754951300, now seen corresponding path program 1 times [2020-11-07 00:52:20,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:20,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897152882] [2020-11-07 00:52:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:20,757 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:20,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-07 00:52:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-07 00:52:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:52:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 00:52:21,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897152882] [2020-11-07 00:52:21,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:21,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:52:21,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803766737] [2020-11-07 00:52:21,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:52:21,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:52:21,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:52:21,466 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 24 states. [2020-11-07 00:52:23,409 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-11-07 00:52:23,770 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-11-07 00:52:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:24,147 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-11-07 00:52:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 00:52:24,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-11-07 00:52:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:24,152 INFO L225 Difference]: With dead ends: 142 [2020-11-07 00:52:24,152 INFO L226 Difference]: Without dead ends: 125 [2020-11-07 00:52:24,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:52:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-07 00:52:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-11-07 00:52:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-07 00:52:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2020-11-07 00:52:24,201 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 91 [2020-11-07 00:52:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:24,202 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2020-11-07 00:52:24,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:52:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2020-11-07 00:52:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 00:52:24,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:24,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:24,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:52:24,214 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash -188247350, now seen corresponding path program 2 times [2020-11-07 00:52:24,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:24,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540780681] [2020-11-07 00:52:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:24,221 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-07 00:52:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-07 00:52:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:52:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:24,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540780681] [2020-11-07 00:52:24,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:24,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:52:24,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296083692] [2020-11-07 00:52:24,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:52:24,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:52:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:52:24,786 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand 24 states. [2020-11-07 00:52:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:26,921 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2020-11-07 00:52:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:52:26,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-11-07 00:52:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:26,923 INFO L225 Difference]: With dead ends: 141 [2020-11-07 00:52:26,923 INFO L226 Difference]: Without dead ends: 135 [2020-11-07 00:52:26,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 00:52:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-07 00:52:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-11-07 00:52:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 00:52:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2020-11-07 00:52:26,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 91 [2020-11-07 00:52:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:26,952 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2020-11-07 00:52:26,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:52:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2020-11-07 00:52:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 00:52:26,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:26,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:26,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:52:26,955 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash -462605947, now seen corresponding path program 1 times [2020-11-07 00:52:26,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:26,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324064604] [2020-11-07 00:52:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:26,959 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:52:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 00:52:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:52:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-07 00:52:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-07 00:52:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-07 00:52:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:52:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:52:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:52:27,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324064604] [2020-11-07 00:52:27,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:52:27,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 00:52:27,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681605867] [2020-11-07 00:52:27,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 00:52:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:52:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 00:52:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-11-07 00:52:27,400 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 19 states. [2020-11-07 00:52:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:52:29,121 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-11-07 00:52:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:52:29,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-11-07 00:52:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:52:29,124 INFO L225 Difference]: With dead ends: 163 [2020-11-07 00:52:29,125 INFO L226 Difference]: Without dead ends: 149 [2020-11-07 00:52:29,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 00:52:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-07 00:52:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2020-11-07 00:52:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 00:52:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2020-11-07 00:52:29,154 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 92 [2020-11-07 00:52:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:52:29,154 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2020-11-07 00:52:29,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 00:52:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2020-11-07 00:52:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-07 00:52:29,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:52:29,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:52:29,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:52:29,156 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:52:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:52:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash -472690422, now seen corresponding path program 1 times [2020-11-07 00:52:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:52:29,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438334830] [2020-11-07 00:52:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:52:29,161 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:52:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:52:29,179 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:52:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:52:29,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:52:29,270 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:52:29,270 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:52:29,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:52:29,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:52:29 BoogieIcfgContainer [2020-11-07 00:52:29,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:52:29,293 INFO L168 Benchmark]: Toolchain (without parser) took 19338.35 ms. Allocated memory was 158.3 MB in the beginning and 331.4 MB in the end (delta: 173.0 MB). Free memory was 134.4 MB in the beginning and 132.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 175.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:52:29,294 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:52:29,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 532.14 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 109.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:52:29,295 INFO L168 Benchmark]: Boogie Preprocessor took 79.28 ms. Allocated memory is still 158.3 MB. Free memory was 109.7 MB in the beginning and 139.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:52:29,296 INFO L168 Benchmark]: RCFGBuilder took 857.08 ms. Allocated memory is still 158.3 MB. Free memory was 139.9 MB in the beginning and 138.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 46.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:52:29,297 INFO L168 Benchmark]: TraceAbstraction took 17854.65 ms. Allocated memory was 158.3 MB in the beginning and 331.4 MB in the end (delta: 173.0 MB). Free memory was 138.0 MB in the beginning and 132.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 178.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:52:29,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 532.14 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 109.7 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.28 ms. Allocated memory is still 158.3 MB. Free memory was 109.7 MB in the beginning and 139.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 857.08 ms. Allocated memory is still 158.3 MB. Free memory was 139.9 MB in the beginning and 138.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 46.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17854.65 ms. Allocated memory was 158.3 MB in the beginning and 331.4 MB in the end (delta: 173.0 MB). Free memory was 138.0 MB in the beginning and 132.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 178.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L869] void * guard_malloc_counter = 0; [L889] struct list_head *elem = ((void *)0); [L902] static struct list_head head; [L905] struct list_head *dev1, *dev2; [L906] CALL, EXPR my_malloc(sizeof(*dev1)) [L881] CALL, EXPR __getMemory(size) [L873] (size > 0) ? (0) : __blast_assert () [L874] guard_malloc_counter++ [L875] COND FALSE !(!__VERIFIER_nondet_int()) [L877] return (void *) guard_malloc_counter; [L881] RET, EXPR __getMemory(size) [L881] return __getMemory(size); [L906] RET, EXPR my_malloc(sizeof(*dev1)) [L906] dev1 = my_malloc(sizeof(*dev1)) [L907] CALL, EXPR my_malloc(sizeof(*dev2)) [L881] CALL, EXPR __getMemory(size) [L873] (size > 0) ? (0) : __blast_assert () [L874] guard_malloc_counter++ [L875] COND FALSE !(!__VERIFIER_nondet_int()) [L877] return (void *) guard_malloc_counter; [L881] RET, EXPR __getMemory(size) [L881] return __getMemory(size); [L907] RET, EXPR my_malloc(sizeof(*dev2)) [L907] dev2 = my_malloc(sizeof(*dev2)) [L908] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L909] CALL list_add(dev2, &head) [L892] (new!=elem) ? (0) : __blast_assert () [L893] COND FALSE !(__VERIFIER_nondet_int()) [L909] RET list_add(dev2, &head) [L910] CALL list_add(dev1, &head) [L892] (new!=elem) ? (0) : __blast_assert () [L893] COND TRUE __VERIFIER_nondet_int() [L894] elem = new [L910] RET list_add(dev1, &head) [L911] CALL list_del(dev2) [L898] COND FALSE !(entry==elem) [L911] RET list_del(dev2) [L912] CALL list_add(dev2, &head) [L892] (new!=elem) ? (0) : __blast_assert () [L893] COND FALSE !(__VERIFIER_nondet_int()) [L912] RET list_add(dev2, &head) [L915] CALL list_add(dev1, &head) [L892] (new!=elem) ? (0) : __blast_assert () [L892] CALL __blast_assert () [L8] CALL reach_error() [L3] __assert_fail("0", "rule60_list2.c_1.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 80 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.7s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 12.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 585 SDtfs, 1054 SDslu, 2537 SDs, 0 SdLazy, 6586 SolverSat, 543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 378 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 59 StatesRemovedByMinimization, 8 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...