/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:23:04,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:23:04,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:23:04,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:23:04,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:23:04,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:23:04,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:23:04,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:23:04,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:23:04,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:23:04,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:23:04,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:23:04,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:23:04,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:23:04,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:23:04,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:23:04,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:23:04,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:23:04,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:23:04,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:23:04,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:23:04,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:23:04,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:23:04,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:23:04,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:23:04,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:23:04,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:23:04,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:23:04,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:23:04,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:23:04,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:23:04,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:23:04,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:23:04,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:23:04,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:23:04,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:23:04,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:23:04,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:23:04,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:23:04,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:23:04,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:23:04,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:23:04,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:23:04,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:23:04,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:23:04,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:23:04,446 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:23:04,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:23:04,446 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:23:04,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:23:04,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:23:04,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:23:04,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:23:04,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:23:04,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:23:04,448 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:23:04,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:23:04,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:23:04,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:23:04,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:23:04,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:23:04,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:23:04,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:23:04,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:23:04,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:23:04,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:23:04,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:23:04,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:23:04,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:23:04,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:23:04,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:23:04,451 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:23:04,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:23:04,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:23:04,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:23:04,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:23:04,736 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:23:04,737 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 21:23:04,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/003542205/72d473968a1c49279b684a3e59c5d46d/FLAG130ff18da [2020-08-21 21:23:05,378 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:23:05,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 21:23:05,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/003542205/72d473968a1c49279b684a3e59c5d46d/FLAG130ff18da [2020-08-21 21:23:05,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/003542205/72d473968a1c49279b684a3e59c5d46d [2020-08-21 21:23:05,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:23:05,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:23:05,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:23:05,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:23:05,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:23:05,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:23:05" (1/1) ... [2020-08-21 21:23:05,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b9b1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:05, skipping insertion in model container [2020-08-21 21:23:05,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:23:05" (1/1) ... [2020-08-21 21:23:05,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:23:05,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:23:06,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:23:06,228 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:23:06,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:23:06,383 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:23:06,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06 WrapperNode [2020-08-21 21:23:06,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:23:06,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:23:06,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:23:06,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:23:06,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... [2020-08-21 21:23:06,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:23:06,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:23:06,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:23:06,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:23:06,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 21:23:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:23:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:23:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 21:23:06,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-21 21:23:06,561 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-21 21:23:06,561 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-21 21:23:06,562 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-21 21:23:06,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:23:06,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:23:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 21:23:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-21 21:23:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-21 21:23:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-21 21:23:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-21 21:23:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-21 21:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-21 21:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-21 21:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-21 21:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-21 21:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-21 21:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-21 21:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-21 21:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-21 21:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-21 21:23:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-21 21:23:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-21 21:23:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-21 21:23:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-21 21:23:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-21 21:23:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-21 21:23:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-21 21:23:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-21 21:23:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-21 21:23:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-21 21:23:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-21 21:23:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-21 21:23:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-21 21:23:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-21 21:23:06,570 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-21 21:23:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-21 21:23:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-21 21:23:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-21 21:23:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:23:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-21 21:23:06,571 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-21 21:23:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-21 21:23:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-21 21:23:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-21 21:23:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-21 21:23:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-21 21:23:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-21 21:23:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-21 21:23:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-21 21:23:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-21 21:23:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-21 21:23:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-21 21:23:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-21 21:23:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-21 21:23:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-21 21:23:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-21 21:23:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-21 21:23:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-21 21:23:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-21 21:23:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-21 21:23:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-21 21:23:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-21 21:23:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-21 21:23:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-21 21:23:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-21 21:23:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-21 21:23:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-21 21:23:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:23:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 21:23:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 21:23:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:23:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 21:23:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-21 21:23:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 21:23:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-21 21:23:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-21 21:23:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-21 21:23:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-21 21:23:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-21 21:23:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:23:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-21 21:23:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 21:23:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:23:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:23:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:23:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:23:07,136 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:23:07,136 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:23:07,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:23:07 BoogieIcfgContainer [2020-08-21 21:23:07,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:23:07,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:23:07,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:23:07,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:23:07,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:23:05" (1/3) ... [2020-08-21 21:23:07,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21e3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:23:07, skipping insertion in model container [2020-08-21 21:23:07,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:06" (2/3) ... [2020-08-21 21:23:07,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21e3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:23:07, skipping insertion in model container [2020-08-21 21:23:07,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:23:07" (3/3) ... [2020-08-21 21:23:07,155 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-21 21:23:07,166 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:23:07,173 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:23:07,188 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:23:07,214 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:23:07,214 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:23:07,214 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:23:07,214 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:23:07,215 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:23:07,215 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:23:07,215 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:23:07,215 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:23:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-21 21:23:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 21:23:07,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:07,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:23:07,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-21 21:23:07,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:07,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209482934] [2020-08-21 21:23:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:07,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:23:07,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209482934] [2020-08-21 21:23:07,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:23:07,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:23:07,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217482746] [2020-08-21 21:23:07,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:23:07,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:23:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:23:07,624 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-21 21:23:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:08,149 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-21 21:23:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:23:08,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 21:23:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:08,164 INFO L225 Difference]: With dead ends: 90 [2020-08-21 21:23:08,164 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 21:23:08,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:23:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 21:23:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 21:23:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 21:23:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 21:23:08,228 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-21 21:23:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:08,229 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 21:23:08,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:23:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 21:23:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 21:23:08,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:08,232 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] [2020-08-21 21:23:08,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:23:08,233 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-21 21:23:08,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:08,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312642105] [2020-08-21 21:23:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 21:23:08,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312642105] [2020-08-21 21:23:08,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:23:08,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:23:08,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097928619] [2020-08-21 21:23:08,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:23:08,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:23:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:23:08,547 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-21 21:23:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:08,855 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-21 21:23:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:23:08,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 21:23:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:08,861 INFO L225 Difference]: With dead ends: 69 [2020-08-21 21:23:08,861 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 21:23:08,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:23:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 21:23:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 21:23:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 21:23:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-21 21:23:08,894 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-21 21:23:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:08,896 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-21 21:23:08,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:23:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-21 21:23:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 21:23:08,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:08,898 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] [2020-08-21 21:23:08,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:23:08,900 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:08,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-21 21:23:08,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:08,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571927312] [2020-08-21 21:23:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 21:23:09,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571927312] [2020-08-21 21:23:09,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:09,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:23:09,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268176063] [2020-08-21 21:23:09,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:23:09,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:23:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:23:09,165 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-21 21:23:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:09,360 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-21 21:23:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:23:09,361 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 21:23:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:09,363 INFO L225 Difference]: With dead ends: 71 [2020-08-21 21:23:09,363 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 21:23:09,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:23:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 21:23:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 21:23:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 21:23:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 21:23:09,374 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-21 21:23:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:09,374 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 21:23:09,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:23:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 21:23:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 21:23:09,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:09,376 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] [2020-08-21 21:23:09,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:23:09,377 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-21 21:23:09,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:09,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844662309] [2020-08-21 21:23:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 21:23:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844662309] [2020-08-21 21:23:09,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:09,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 21:23:09,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653039191] [2020-08-21 21:23:09,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:23:09,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:09,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:23:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:23:09,640 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-21 21:23:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:10,567 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-21 21:23:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 21:23:10,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-21 21:23:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:10,569 INFO L225 Difference]: With dead ends: 77 [2020-08-21 21:23:10,569 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 21:23:10,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-08-21 21:23:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 21:23:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-21 21:23:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 21:23:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-21 21:23:10,592 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-21 21:23:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-21 21:23:10,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:23:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-21 21:23:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 21:23:10,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:10,595 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] [2020-08-21 21:23:10,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:23:10,595 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-21 21:23:10,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:10,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316194195] [2020-08-21 21:23:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:10,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:10,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:10,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:10,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:10,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:23:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:23:11,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316194195] [2020-08-21 21:23:11,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:11,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 21:23:11,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107816034] [2020-08-21 21:23:11,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 21:23:11,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 21:23:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:23:11,029 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-21 21:23:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:12,219 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-21 21:23:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:23:12,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-21 21:23:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:12,226 INFO L225 Difference]: With dead ends: 80 [2020-08-21 21:23:12,226 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 21:23:12,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 21:23:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 21:23:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-21 21:23:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 21:23:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 21:23:12,256 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-21 21:23:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:12,256 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 21:23:12,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 21:23:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 21:23:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 21:23:12,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:12,258 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] [2020-08-21 21:23:12,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:23:12,259 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-21 21:23:12,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:12,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437960439] [2020-08-21 21:23:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:23:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:23:12,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437960439] [2020-08-21 21:23:12,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:12,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 21:23:12,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472036375] [2020-08-21 21:23:12,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 21:23:12,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 21:23:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:23:12,525 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-21 21:23:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:13,288 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-21 21:23:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 21:23:13,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-21 21:23:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:13,291 INFO L225 Difference]: With dead ends: 79 [2020-08-21 21:23:13,291 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 21:23:13,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:23:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 21:23:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 21:23:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 21:23:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-21 21:23:13,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-21 21:23:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:13,314 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-21 21:23:13,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 21:23:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-21 21:23:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:23:13,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:13,319 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] [2020-08-21 21:23:13,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:23:13,320 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-21 21:23:13,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:13,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291068461] [2020-08-21 21:23:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:23:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:23:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:23:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:23:13,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291068461] [2020-08-21 21:23:13,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:13,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 21:23:13,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044957584] [2020-08-21 21:23:13,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 21:23:13,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 21:23:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-21 21:23:13,725 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-21 21:23:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:14,916 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-21 21:23:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:23:14,917 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-21 21:23:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:14,919 INFO L225 Difference]: With dead ends: 74 [2020-08-21 21:23:14,919 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 21:23:14,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 21:23:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 21:23:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 21:23:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:23:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 21:23:14,931 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-21 21:23:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:14,931 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 21:23:14,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 21:23:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 21:23:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:23:14,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:14,933 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] [2020-08-21 21:23:14,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:23:14,934 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-21 21:23:14,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:14,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965615558] [2020-08-21 21:23:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:23:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:23:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:23:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:23:15,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965615558] [2020-08-21 21:23:15,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:15,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 21:23:15,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838791291] [2020-08-21 21:23:15,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 21:23:15,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 21:23:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:23:15,300 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-21 21:23:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:16,313 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 21:23:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 21:23:16,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-21 21:23:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:16,315 INFO L225 Difference]: With dead ends: 84 [2020-08-21 21:23:16,315 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 21:23:16,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 21:23:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 21:23:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 21:23:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:23:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-21 21:23:16,333 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-21 21:23:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:16,333 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-21 21:23:16,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 21:23:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-21 21:23:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:23:16,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:16,338 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] [2020-08-21 21:23:16,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:23:16,338 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:16,339 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-21 21:23:16,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:16,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006626505] [2020-08-21 21:23:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:23:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:23:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:23:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 21:23:16,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006626505] [2020-08-21 21:23:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:16,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:23:16,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801380563] [2020-08-21 21:23:16,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:23:16,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:16,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:23:16,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:23:16,513 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-21 21:23:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:16,959 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-21 21:23:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:23:16,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-21 21:23:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:16,961 INFO L225 Difference]: With dead ends: 81 [2020-08-21 21:23:16,961 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 21:23:16,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:23:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 21:23:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 21:23:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 21:23:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-21 21:23:16,972 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-21 21:23:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:16,972 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-21 21:23:16,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:23:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-21 21:23:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:23:16,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:16,974 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] [2020-08-21 21:23:16,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:23:16,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-21 21:23:16,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:16,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328688838] [2020-08-21 21:23:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:23:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 21:23:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:23:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:23:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:23:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:23:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 21:23:17,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328688838] [2020-08-21 21:23:17,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:23:17,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 21:23:17,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572911364] [2020-08-21 21:23:17,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 21:23:17,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 21:23:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:23:17,252 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-21 21:23:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:23:18,235 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-21 21:23:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:23:18,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-21 21:23:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:23:18,240 INFO L225 Difference]: With dead ends: 93 [2020-08-21 21:23:18,240 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 21:23:18,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 21:23:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 21:23:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-21 21:23:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 21:23:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-21 21:23:18,266 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-21 21:23:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:23:18,266 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-21 21:23:18,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 21:23:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-21 21:23:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 21:23:18,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:18,268 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:23:18,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:23:18,269 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-21 21:23:18,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:18,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477446701] [2020-08-21 21:23:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:23:18,295 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:23:18,296 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:23:18,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:23:18,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:23:18 BoogieIcfgContainer [2020-08-21 21:23:18,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:23:18,330 INFO L168 Benchmark]: Toolchain (without parser) took 12588.47 ms. Allocated memory was 140.0 MB in the beginning and 371.2 MB in the end (delta: 231.2 MB). Free memory was 102.1 MB in the beginning and 325.8 MB in the end (delta: -223.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:23:18,331 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:23:18,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.79 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 166.3 MB in the end (delta: -64.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:23:18,333 INFO L168 Benchmark]: Boogie Preprocessor took 104.55 ms. Allocated memory is still 203.4 MB. Free memory was 166.3 MB in the beginning and 163.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:23:18,333 INFO L168 Benchmark]: RCFGBuilder took 655.30 ms. Allocated memory is still 203.4 MB. Free memory was 163.0 MB in the beginning and 117.0 MB in the end (delta: 46.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:23:18,334 INFO L168 Benchmark]: TraceAbstraction took 11179.41 ms. Allocated memory was 203.4 MB in the beginning and 371.2 MB in the end (delta: 167.8 MB). Free memory was 116.4 MB in the beginning and 325.8 MB in the end (delta: -209.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:23:18,337 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 643.79 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 166.3 MB in the end (delta: -64.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.55 ms. Allocated memory is still 203.4 MB. Free memory was 166.3 MB in the beginning and 163.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 655.30 ms. Allocated memory is still 203.4 MB. Free memory was 163.0 MB in the beginning and 117.0 MB in the end (delta: 46.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11179.41 ms. Allocated memory was 203.4 MB in the beginning and 371.2 MB in the end (delta: 167.8 MB). Free memory was 116.4 MB in the beginning and 325.8 MB in the end (delta: -209.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; [L903] struct list_head *dev1, *dev2; [L904] CALL, EXPR my_malloc(sizeof(*dev1)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L905] RET, EXPR my_malloc(sizeof(*dev2)) [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L907] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L907] RET list_add(dev2, &head) [L908] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L908] RET list_add(dev1, &head) [L909] CALL list_del(dev2) [L896] COND FALSE !(entry==elem) [L909] RET list_del(dev2) [L910] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND FALSE !(__VERIFIER_nondet_int()) [L910] RET list_add(dev2, &head) [L913] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L890] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 375 SDtfs, 460 SDslu, 963 SDs, 0 SdLazy, 5200 SolverSat, 537 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 48 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 509 NumberOfCodeBlocks, 509 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 435 ConstructedInterpolants, 0 QuantifiedInterpolants, 89234 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 90/143 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 incorrect! Received shutdown request...