/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:21:02,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:21:02,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:21:02,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:21:02,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:21:02,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:21:02,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:21:02,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:21:02,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:21:02,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:21:02,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:21:02,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:21:02,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:21:02,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:21:02,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:21:02,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:21:02,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:21:02,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:21:02,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:21:02,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:21:02,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:21:02,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:21:02,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:21:02,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:21:02,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:21:02,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:21:02,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:21:02,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:21:02,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:21:02,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:21:02,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:21:02,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:21:02,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:21:02,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:21:02,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:21:02,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:21:02,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:21:02,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:21:02,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:21:02,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:21:02,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:21:02,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:21:02,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:21:02,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:21:02,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:21:02,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:21:02,651 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:21:02,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:21:02,652 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:21:02,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:21:02,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:21:02,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:21:02,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:21:02,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:21:02,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:21:02,655 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:21:02,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:21:02,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:21:02,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:21:02,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:21:02,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:21:02,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:21:02,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:21:02,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:21:02,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:21:02,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:21:02,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:21:02,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:21:02,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:02,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:21:02,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:21:02,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:21:03,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:21:03,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:21:03,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:21:03,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:21:03,044 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:21:03,046 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.i [2020-07-21 11:21:03,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ceedc7f/9fd667c368764b509377fbf00f4ea5ef/FLAG90b2a7a5b [2020-07-21 11:21:03,785 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:21:03,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.i [2020-07-21 11:21:03,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ceedc7f/9fd667c368764b509377fbf00f4ea5ef/FLAG90b2a7a5b [2020-07-21 11:21:04,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ceedc7f/9fd667c368764b509377fbf00f4ea5ef [2020-07-21 11:21:04,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:21:04,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:21:04,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:04,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:21:04,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:21:04,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:04" (1/1) ... [2020-07-21 11:21:04,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca083af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:04, skipping insertion in model container [2020-07-21 11:21:04,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:04" (1/1) ... [2020-07-21 11:21:04,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:21:04,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:21:04,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:04,923 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:21:05,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:05,098 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:21:05,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05 WrapperNode [2020-07-21 11:21:05,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:05,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:21:05,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:21:05,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:21:05,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (1/1) ... [2020-07-21 11:21:05,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:21:05,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:21:05,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:21:05,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:21:05,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (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 [2020-07-21 11:21:05,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:21:05,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:21:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-21 11:21:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-07-21 11:21:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-07-21 11:21:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-21 11:21:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-07-21 11:21:05,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:21:05,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:21:05,327 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-21 11:21:05,327 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-07-21 11:21:05,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-07-21 11:21:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-07-21 11:21:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-07-21 11:21:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-07-21 11:21:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-07-21 11:21:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-07-21 11:21:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-07-21 11:21:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-07-21 11:21:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-07-21 11:21:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-07-21 11:21:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-07-21 11:21:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-07-21 11:21:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-07-21 11:21:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-07-21 11:21:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-07-21 11:21:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-07-21 11:21:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-07-21 11:21:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-07-21 11:21:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-07-21 11:21:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-07-21 11:21:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-07-21 11:21:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-07-21 11:21:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-07-21 11:21:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-07-21 11:21:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-07-21 11:21:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-07-21 11:21:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-07-21 11:21:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-21 11:21:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-07-21 11:21:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-07-21 11:21:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-07-21 11:21:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-07-21 11:21:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-07-21 11:21:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-07-21 11:21:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-07-21 11:21:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-07-21 11:21:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-07-21 11:21:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-21 11:21:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-07-21 11:21:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-07-21 11:21:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-07-21 11:21:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-07-21 11:21:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-07-21 11:21:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-07-21 11:21:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-07-21 11:21:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-07-21 11:21:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-07-21 11:21:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-07-21 11:21:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-07-21 11:21:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-07-21 11:21:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-07-21 11:21:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-07-21 11:21:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-07-21 11:21:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-21 11:21:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-07-21 11:21:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-07-21 11:21:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-07-21 11:21:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-07-21 11:21:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-07-21 11:21:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-07-21 11:21:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-07-21 11:21:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-07-21 11:21:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-07-21 11:21:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-07-21 11:21:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-07-21 11:21:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-07-21 11:21:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-07-21 11:21:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-07-21 11:21:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-07-21 11:21:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-07-21 11:21:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-07-21 11:21:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-07-21 11:21:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-07-21 11:21:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-07-21 11:21:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-07-21 11:21:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-07-21 11:21:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-07-21 11:21:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-07-21 11:21:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-07-21 11:21:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-07-21 11:21:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-07-21 11:21:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-07-21 11:21:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:21:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-07-21 11:21:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-07-21 11:21:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-07-21 11:21:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-07-21 11:21:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-07-21 11:21:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-07-21 11:21:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-07-21 11:21:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:21:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-07-21 11:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-07-21 11:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-21 11:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-07-21 11:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:21:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:21:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:21:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-21 11:21:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:21:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:21:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:21:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:21:05,910 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:21:05,910 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:21:05,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:05 BoogieIcfgContainer [2020-07-21 11:21:05,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:21:05,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:21:05,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:21:05,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:21:05,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:21:04" (1/3) ... [2020-07-21 11:21:05,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485a62fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:05, skipping insertion in model container [2020-07-21 11:21:05,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:05" (2/3) ... [2020-07-21 11:21:05,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485a62fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:05, skipping insertion in model container [2020-07-21 11:21:05,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:05" (3/3) ... [2020-07-21 11:21:05,926 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.i [2020-07-21 11:21:05,939 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:21:05,946 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:21:05,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:21:05,981 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:21:05,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:21:05,982 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:21:05,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:21:05,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:21:05,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:21:05,982 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:21:05,982 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:21:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-21 11:21:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:21:06,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:06,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:06,009 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:06,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1135050545, now seen corresponding path program 1 times [2020-07-21 11:21:06,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:06,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50816672] [2020-07-21 11:21:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:21:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:06,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:06,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50816672] [2020-07-21 11:21:06,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:06,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:21:06,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411360671] [2020-07-21 11:21:06,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:21:06,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:06,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:21:06,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:21:06,378 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 6 states. [2020-07-21 11:21:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:06,528 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-07-21 11:21:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:21:06,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 11:21:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:06,548 INFO L225 Difference]: With dead ends: 84 [2020-07-21 11:21:06,549 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:21:06,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:21:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:21:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 11:21:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 11:21:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-07-21 11:21:06,632 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 13 [2020-07-21 11:21:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:06,633 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-07-21 11:21:06,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:21:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-07-21 11:21:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:21:06,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:06,636 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 11:21:06,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:06,853 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:06,854 INFO L82 PathProgramCache]: Analyzing trace with hash -925661111, now seen corresponding path program 1 times [2020-07-21 11:21:06,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:06,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511314723] [2020-07-21 11:21:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 11:21:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 11:21:07,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:21:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 11:21:07,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511314723] [2020-07-21 11:21:07,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:21:07,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 11:21:07,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303225328] [2020-07-21 11:21:07,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:21:07,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:21:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:21:07,301 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2020-07-21 11:21:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:07,356 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-07-21 11:21:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:21:07,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-21 11:21:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:07,364 INFO L225 Difference]: With dead ends: 65 [2020-07-21 11:21:07,364 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 11:21:07,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:21:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 11:21:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 11:21:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 11:21:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-07-21 11:21:07,398 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 38 [2020-07-21 11:21:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:07,400 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-07-21 11:21:07,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:21:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-07-21 11:21:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:21:07,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:07,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:07,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:07,620 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -894641304, now seen corresponding path program 1 times [2020-07-21 11:21:07,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:07,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888442909] [2020-07-21 11:21:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 11:21:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 11:21:07,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:07,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888442909] [2020-07-21 11:21:07,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:07,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:21:07,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099593186] [2020-07-21 11:21:07,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:21:07,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:21:07,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:21:07,871 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2020-07-21 11:21:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:07,896 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-07-21 11:21:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:21:07,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-21 11:21:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:07,898 INFO L225 Difference]: With dead ends: 63 [2020-07-21 11:21:07,899 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:21:07,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:21:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:21:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 11:21:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 11:21:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-21 11:21:07,907 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 38 [2020-07-21 11:21:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:07,908 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-21 11:21:07,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:21:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-21 11:21:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:21:07,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:07,909 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 11:21:08,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:08,124 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1188044311, now seen corresponding path program 1 times [2020-07-21 11:21:08,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:08,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614812130] [2020-07-21 11:21:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 11:21:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 11:21:08,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:08,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614812130] [2020-07-21 11:21:08,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:08,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 11:21:08,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765901096] [2020-07-21 11:21:08,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 11:21:08,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 11:21:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:21:08,442 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 13 states. [2020-07-21 11:21:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:09,003 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-07-21 11:21:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:21:09,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-07-21 11:21:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:09,009 INFO L225 Difference]: With dead ends: 71 [2020-07-21 11:21:09,009 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 11:21:09,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:21:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 11:21:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-07-21 11:21:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 11:21:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-07-21 11:21:09,021 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 38 [2020-07-21 11:21:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:09,022 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-07-21 11:21:09,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 11:21:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-07-21 11:21:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:21:09,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:09,024 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 11:21:09,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:09,232 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1335597358, now seen corresponding path program 1 times [2020-07-21 11:21:09,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:09,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725704328] [2020-07-21 11:21:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 11:21:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:09,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:21:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:10,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725704328] [2020-07-21 11:21:10,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:21:10,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-07-21 11:21:10,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476920533] [2020-07-21 11:21:10,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 11:21:10,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 11:21:10,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:21:10,222 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 22 states. [2020-07-21 11:21:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:10,997 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-21 11:21:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 11:21:10,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-07-21 11:21:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:11,001 INFO L225 Difference]: With dead ends: 62 [2020-07-21 11:21:11,001 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 11:21:11,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 11:21:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 11:21:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-07-21 11:21:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 11:21:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-07-21 11:21:11,013 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 45 [2020-07-21 11:21:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:11,014 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-07-21 11:21:11,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 11:21:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-07-21 11:21:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:21:11,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:11,016 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 11:21:11,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:11,221 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash 526250732, now seen corresponding path program 1 times [2020-07-21 11:21:11,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:11,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412895777] [2020-07-21 11:21:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 11:21:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:11,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:21:11,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:21:11,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:21:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:11,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412895777] [2020-07-21 11:21:11,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:21:11,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-07-21 11:21:11,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129363030] [2020-07-21 11:21:11,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 11:21:11,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 11:21:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:21:11,983 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 24 states. [2020-07-21 11:21:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:12,849 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-21 11:21:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 11:21:12,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-07-21 11:21:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:12,852 INFO L225 Difference]: With dead ends: 66 [2020-07-21 11:21:12,853 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 11:21:12,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 11:21:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 11:21:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-07-21 11:21:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 11:21:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-07-21 11:21:12,865 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 45 [2020-07-21 11:21:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:12,866 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-07-21 11:21:12,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 11:21:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-07-21 11:21:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 11:21:12,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:12,868 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-21 11:21:13,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:13,072 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2119488644, now seen corresponding path program 1 times [2020-07-21 11:21:13,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:13,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37643863] [2020-07-21 11:21:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 11:21:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:21:13,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:21:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:21:14,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37643863] [2020-07-21 11:21:14,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:21:14,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 25 [2020-07-21 11:21:14,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519310696] [2020-07-21 11:21:14,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 11:21:14,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 11:21:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:21:14,073 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 25 states. [2020-07-21 11:21:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:15,111 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-21 11:21:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:21:15,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-07-21 11:21:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:15,114 INFO L225 Difference]: With dead ends: 66 [2020-07-21 11:21:15,114 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 11:21:15,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 14 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1515, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 11:21:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 11:21:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-07-21 11:21:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 11:21:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-07-21 11:21:15,127 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 57 [2020-07-21 11:21:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:15,128 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-07-21 11:21:15,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 11:21:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-07-21 11:21:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 11:21:15,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:15,130 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-21 11:21:15,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:15,344 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1366132026, now seen corresponding path program 1 times [2020-07-21 11:21:15,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:15,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175029403] [2020-07-21 11:21:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:15,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 11:21:15,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:21:15,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:21:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:21:16,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175029403] [2020-07-21 11:21:16,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:21:16,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2020-07-21 11:21:16,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86799512] [2020-07-21 11:21:16,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 11:21:16,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 11:21:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:21:16,283 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 23 states. [2020-07-21 11:21:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:17,297 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-07-21 11:21:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:21:17,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-07-21 11:21:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:17,299 INFO L225 Difference]: With dead ends: 63 [2020-07-21 11:21:17,299 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 11:21:17,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 17 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 11:21:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 11:21:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-07-21 11:21:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 11:21:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-07-21 11:21:17,308 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 57 [2020-07-21 11:21:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:17,309 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-07-21 11:21:17,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 11:21:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-07-21 11:21:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 11:21:17,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:17,310 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-21 11:21:17,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:17,516 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:17,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1588672638, now seen corresponding path program 1 times [2020-07-21 11:21:17,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:17,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50997548] [2020-07-21 11:21:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 11:21:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 11:21:17,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:17,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50997548] [2020-07-21 11:21:17,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:17,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-21 11:21:17,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144957652] [2020-07-21 11:21:17,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:21:17,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:21:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:21:17,849 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 15 states. [2020-07-21 11:21:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:18,351 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-21 11:21:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 11:21:18,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-07-21 11:21:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:18,353 INFO L225 Difference]: With dead ends: 60 [2020-07-21 11:21:18,353 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 11:21:18,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:21:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 11:21:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-07-21 11:21:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 11:21:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-07-21 11:21:18,362 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 57 [2020-07-21 11:21:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:18,363 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-07-21 11:21:18,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:21:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-07-21 11:21:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 11:21:18,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:18,365 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-21 11:21:18,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:18,566 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash 779326012, now seen corresponding path program 1 times [2020-07-21 11:21:18,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:18,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134970081] [2020-07-21 11:21:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 11:21:18,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 11:21:18,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:21:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 11:21:19,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134970081] [2020-07-21 11:21:19,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:21:19,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 11:21:19,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785386511] [2020-07-21 11:21:19,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 11:21:19,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:19,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 11:21:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 11:21:19,004 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 11 states. [2020-07-21 11:21:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:19,184 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-07-21 11:21:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:21:19,184 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-07-21 11:21:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:19,185 INFO L225 Difference]: With dead ends: 47 [2020-07-21 11:21:19,186 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:21:19,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:21:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:21:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:21:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:21:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:21:19,188 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-07-21 11:21:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:19,188 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:21:19,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 11:21:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:21:19,188 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:21:19,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:19,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:21:19,816 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-07-21 11:21:20,491 INFO L268 CegarLoopResult]: For program point my_mallocFINAL(lines 878 880) no Hoare annotation was computed. [2020-07-21 11:21:20,492 INFO L264 CegarLoopResult]: At program point L879(line 879) the Hoare annotation is: (let ((.cse0 (not (<= 8 |my_malloc_#in~size|)))) (and (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (not (<= ~elem~0.offset 0)) (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) .cse0) (or .cse0 (<= 8 my_malloc_~size)))) [2020-07-21 11:21:20,492 INFO L268 CegarLoopResult]: For program point L879-1(line 879) no Hoare annotation was computed. [2020-07-21 11:21:20,492 INFO L264 CegarLoopResult]: At program point my_mallocENTRY(lines 878 880) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (not (<= ~elem~0.offset 0)) (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (not (<= 8 |my_malloc_#in~size|))) [2020-07-21 11:21:20,493 INFO L268 CegarLoopResult]: For program point my_mallocEXIT(lines 878 880) no Hoare annotation was computed. [2020-07-21 11:21:20,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:20,493 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) [2020-07-21 11:21:20,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:20,493 INFO L268 CegarLoopResult]: For program point L896(lines 896 897) no Hoare annotation was computed. [2020-07-21 11:21:20,493 INFO L268 CegarLoopResult]: For program point L896-2(lines 895 898) no Hoare annotation was computed. [2020-07-21 11:21:20,493 INFO L268 CegarLoopResult]: For program point list_delEXIT(lines 895 898) no Hoare annotation was computed. [2020-07-21 11:21:20,494 INFO L264 CegarLoopResult]: At program point list_delENTRY(lines 895 898) the Hoare annotation is: (and (or (and (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (<= 1 ~guard_malloc_counter~0.offset))) (<= ~elem~0.offset |old(~elem~0.offset)|)) [2020-07-21 11:21:20,494 INFO L264 CegarLoopResult]: At program point list_addENTRY(lines 889 893) the Hoare annotation is: (let ((.cse0 (and (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base))) (.cse1 (not (<= 1 ~guard_malloc_counter~0.offset)))) (and (or .cse0 (not (<= (+ |list_add_#in~new.offset| 1) |old(~elem~0.offset)|)) .cse1) (or .cse0 (not (<= |old(~elem~0.offset)| 0)) (not (<= 2 |list_add_#in~new.offset|)) .cse1) (or (not (<= (+ |old(~elem~0.offset)| 1) |list_add_#in~new.offset|)) (<= ~elem~0.offset |old(~elem~0.offset)|)))) [2020-07-21 11:21:20,494 INFO L268 CegarLoopResult]: For program point L891(lines 891 892) no Hoare annotation was computed. [2020-07-21 11:21:20,494 INFO L268 CegarLoopResult]: For program point L890(line 890) no Hoare annotation was computed. [2020-07-21 11:21:20,494 INFO L268 CegarLoopResult]: For program point L891-2(lines 889 893) no Hoare annotation was computed. [2020-07-21 11:21:20,495 INFO L264 CegarLoopResult]: At program point L890-2(line 890) the Hoare annotation is: (and (not (<= (+ |old(~elem~0.offset)| 1) |list_add_#in~new.offset|)) (or (not (<= (+ |list_add_#in~new.offset| 1) |old(~elem~0.offset)|)) (not (<= 1 ~guard_malloc_counter~0.offset)))) [2020-07-21 11:21:20,495 INFO L268 CegarLoopResult]: For program point L890-3(line 890) no Hoare annotation was computed. [2020-07-21 11:21:20,495 INFO L268 CegarLoopResult]: For program point list_addEXIT(lines 889 893) no Hoare annotation was computed. [2020-07-21 11:21:20,495 INFO L268 CegarLoopResult]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-21 11:21:20,495 INFO L268 CegarLoopResult]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-21 11:21:20,495 INFO L268 CegarLoopResult]: For program point __blast_assertFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-21 11:21:20,496 INFO L271 CegarLoopResult]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2020-07-21 11:21:20,496 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:20,496 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 ~guard_malloc_counter~0.offset) (<= ~elem~0.offset 0)) [2020-07-21 11:21:20,496 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:20,496 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:20,496 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 902 917) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (<= |old(~elem~0.offset)| 0))) [2020-07-21 11:21:20,496 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 902 917) no Hoare annotation was computed. [2020-07-21 11:21:20,496 INFO L264 CegarLoopResult]: At program point L909(line 909) the Hoare annotation is: (let ((.cse0 (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset))) (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and .cse0 (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset) (<= (+ ~elem~0.offset 1) main_~dev2~0.offset)) (not (<= |old(~elem~0.offset)| 0)) (and .cse0 (<= 2 main_~dev2~0.offset) (<= ~elem~0.offset 0)))) [2020-07-21 11:21:20,496 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 902 917) no Hoare annotation was computed. [2020-07-21 11:21:20,497 INFO L264 CegarLoopResult]: At program point L908(line 908) the Hoare annotation is: (let ((.cse1 (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset)) (.cse2 (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset)) (.cse0 (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset)) (.cse3 (<= 2 main_~dev2~0.offset))) (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and .cse0 (= main_~dev2~0.base ~elem~0.base) .cse1 .cse2 .cse3 (= main_~dev2~0.offset ~elem~0.offset)) (and .cse0 .cse1 .cse2 (<= (+ ~elem~0.offset 1) main_~dev2~0.offset)) (not (<= |old(~elem~0.offset)| 0)) (and .cse0 .cse3 (<= ~elem~0.offset 0)))) [2020-07-21 11:21:20,497 INFO L264 CegarLoopResult]: At program point L907(line 907) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset) (<= 1 main_~dev1~0.offset) (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (<= |old(~elem~0.offset)| 0))) [2020-07-21 11:21:20,497 INFO L268 CegarLoopResult]: For program point L906(lines 906 915) no Hoare annotation was computed. [2020-07-21 11:21:20,497 INFO L264 CegarLoopResult]: At program point L907-1(line 907) the Hoare annotation is: (let ((.cse0 (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset)) (.cse1 (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset)) (.cse2 (<= (+ main_~dev1~0.offset 1) main_~dev2~0.offset))) (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and .cse0 (= main_~dev2~0.base ~elem~0.base) .cse1 .cse2 (<= 2 main_~dev2~0.offset) (= main_~dev2~0.offset ~elem~0.offset)) (and .cse0 (<= 1 main_~dev1~0.offset) .cse1 .cse2 (<= ~elem~0.offset |old(~elem~0.offset)|)) (not (<= |old(~elem~0.offset)| 0)))) [2020-07-21 11:21:20,497 INFO L264 CegarLoopResult]: At program point L905(line 905) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (= 0 main_~dev1~0.base) (= 0 main_~dev1~0.offset)) (not (<= |old(~elem~0.offset)| 0)) (and (<= (+ |old(~guard_malloc_counter~0.offset)| 1) ~guard_malloc_counter~0.offset) (<= 1 main_~dev1~0.offset) (<= main_~dev1~0.offset ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base))) [2020-07-21 11:21:20,497 INFO L268 CegarLoopResult]: For program point L906-1(lines 906 915) no Hoare annotation was computed. [2020-07-21 11:21:20,497 INFO L264 CegarLoopResult]: At program point L904(line 904) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (and (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (= |old(~elem~0.offset)| ~elem~0.offset) (= |old(~elem~0.base)| ~elem~0.base)) (not (<= |old(~elem~0.offset)| 0))) [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point L905-1(line 905) no Hoare annotation was computed. [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point L904-1(line 904) no Hoare annotation was computed. [2020-07-21 11:21:20,498 INFO L264 CegarLoopResult]: At program point __getMemoryENTRY(lines 869 876) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (not (<= ~elem~0.offset 0)) (<= |old(~guard_malloc_counter~0.offset)| ~guard_malloc_counter~0.offset) (not (<= 8 |__getMemory_#in~size|))) [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point __getMemoryEXIT(lines 869 876) no Hoare annotation was computed. [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point __getMemoryFINAL(lines 869 876) no Hoare annotation was computed. [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point L873(lines 873 874) no Hoare annotation was computed. [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point L871(line 871) no Hoare annotation was computed. [2020-07-21 11:21:20,498 INFO L264 CegarLoopResult]: At program point L871-2(line 871) the Hoare annotation is: (or (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (not (<= ~elem~0.offset 0)) (not (<= 8 |__getMemory_#in~size|))) [2020-07-21 11:21:20,498 INFO L268 CegarLoopResult]: For program point L871-3(line 871) no Hoare annotation was computed. [2020-07-21 11:21:20,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:21:20 BoogieIcfgContainer [2020-07-21 11:21:20,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:21:20,506 INFO L168 Benchmark]: Toolchain (without parser) took 16371.26 ms. Allocated memory was 145.8 MB in the beginning and 337.6 MB in the end (delta: 191.9 MB). Free memory was 101.6 MB in the beginning and 210.5 MB in the end (delta: -108.8 MB). Peak memory consumption was 201.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:20,507 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 11:21:20,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 962.01 ms. Allocated memory was 145.8 MB in the beginning and 206.0 MB in the end (delta: 60.3 MB). Free memory was 101.2 MB in the beginning and 169.9 MB in the end (delta: -68.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:20,509 INFO L168 Benchmark]: Boogie Preprocessor took 117.26 ms. Allocated memory is still 206.0 MB. Free memory was 169.9 MB in the beginning and 167.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:20,509 INFO L168 Benchmark]: RCFGBuilder took 689.85 ms. Allocated memory is still 206.0 MB. Free memory was 167.3 MB in the beginning and 121.4 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:20,510 INFO L168 Benchmark]: TraceAbstraction took 14587.31 ms. Allocated memory was 206.0 MB in the beginning and 337.6 MB in the end (delta: 131.6 MB). Free memory was 120.7 MB in the beginning and 210.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 160.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:20,514 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 962.01 ms. Allocated memory was 145.8 MB in the beginning and 206.0 MB in the end (delta: 60.3 MB). Free memory was 101.2 MB in the beginning and 169.9 MB in the end (delta: -68.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.26 ms. Allocated memory is still 206.0 MB. Free memory was 169.9 MB in the beginning and 167.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 689.85 ms. Allocated memory is still 206.0 MB. Free memory was 167.3 MB in the beginning and 121.4 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14587.31 ms. Allocated memory was 206.0 MB in the beginning and 337.6 MB in the end (delta: 131.6 MB). Free memory was 120.7 MB in the beginning and 210.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 160.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.4s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 360 SDtfs, 422 SDslu, 1354 SDs, 0 SdLazy, 3586 SolverSat, 443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 827 GetRequests, 563 SyntacticMatches, 47 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 73 PreInvPairs, 84 NumberOfFragments, 431 HoareAnnotationTreeSize, 73 FomulaSimplifications, 866 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 18 FomulaSimplificationsInter, 881 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 445 NumberOfCodeBlocks, 445 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 728 ConstructedInterpolants, 0 QuantifiedInterpolants, 115989 SizeOfPredicates, 56 NumberOfNonLiveVariables, 2611 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 163/243 InterpolantCoveringCapability, 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 correct! Received shutdown request...