/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 -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 0.1.25-5644d1e-m [2020-08-18 11:21:11,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:21:11,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:21:11,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:21:11,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:21:11,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:21:11,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:21:11,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:21:11,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:21:11,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:21:11,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:21:11,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:21:11,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:21:11,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:21:11,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:21:11,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:21:11,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:21:11,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:21:11,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:21:11,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:21:11,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:21:11,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:21:11,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:21:11,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:21:11,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:21:11,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:21:11,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:21:11,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:21:11,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:21:11,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:21:11,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:21:11,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:21:11,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:21:11,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:21:11,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:21:11,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:21:11,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:21:11,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:21:11,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:21:11,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:21:11,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:21:11,601 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 [2020-08-18 11:21:11,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:21:11,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:21:11,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:21:11,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:21:11,635 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:21:11,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:21:11,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:21:11,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:21:11,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:21:11,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:21:11,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:21:11,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:21:11,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:21:11,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:21:11,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:21:11,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:21:11,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:21:11,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:21:11,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:21:11,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:21:11,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:21:11,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:21:11,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:21:11,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:21:11,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:21:11,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:21:11,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:21:11,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:21:11,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:21:11,640 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 [2020-08-18 11:21:11,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:21:11,955 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:21:11,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:21:11,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:21:11,962 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:21:11,962 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-18 11:21:12,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b425d888/b285578702bc46e48e21045b35600632/FLAG32e7fed69 [2020-08-18 11:21:12,561 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:21:12,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-18 11:21:12,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b425d888/b285578702bc46e48e21045b35600632/FLAG32e7fed69 [2020-08-18 11:21:12,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b425d888/b285578702bc46e48e21045b35600632 [2020-08-18 11:21:12,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:21:12,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:21:12,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:21:12,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:21:12,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:21:12,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:21:12" (1/1) ... [2020-08-18 11:21:12,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b26f9c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:12, skipping insertion in model container [2020-08-18 11:21:12,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:21:12" (1/1) ... [2020-08-18 11:21:12,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:21:12,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:21:13,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:21:13,395 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:21:13,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:21:13,549 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:21:13,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13 WrapperNode [2020-08-18 11:21:13,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:21:13,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:21:13,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:21:13,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:21:13,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (1/1) ... [2020-08-18 11:21:13,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:21:13,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:21:13,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:21:13,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:21:13,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (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 [2020-08-18 11:21:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:21:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:21:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-18 11:21:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-18 11:21:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-18 11:21:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-18 11:21:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-18 11:21:13,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:21:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:21:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-18 11:21:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-18 11:21:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-18 11:21:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-18 11:21:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-18 11:21:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-18 11:21:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-18 11:21:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-18 11:21:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-18 11:21:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-18 11:21:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-18 11:21:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-18 11:21:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-18 11:21:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-18 11:21:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-18 11:21:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-18 11:21:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-18 11:21:13,678 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-18 11:21:13,678 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-18 11:21:13,678 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-18 11:21:13,678 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-18 11:21:13,678 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-18 11:21:13,678 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-18 11:21:13,679 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-18 11:21:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-18 11:21:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-18 11:21:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-18 11:21:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-18 11:21:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-18 11:21:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-18 11:21:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-18 11:21:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-18 11:21:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-18 11:21:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-18 11:21:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-18 11:21:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-18 11:21:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-18 11:21:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-18 11:21:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-18 11:21:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-18 11:21:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-18 11:21:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-18 11:21:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-18 11:21:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-18 11:21:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-18 11:21:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-18 11:21:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-18 11:21:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-18 11:21:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-18 11:21:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-18 11:21:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-18 11:21:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-18 11:21:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-18 11:21:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-18 11:21:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-18 11:21:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-18 11:21:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-18 11:21:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-18 11:21:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-18 11:21:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-18 11:21:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:21:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 11:21:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 11:21:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:21:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 11:21:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-18 11:21:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 11:21:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-18 11:21:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-18 11:21:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-18 11:21:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-18 11:21:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-18 11:21:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-18 11:21:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-18 11:21:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-18 11:21:13,698 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-18 11:21:13,699 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-18 11:21:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:21:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:21:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:21:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 11:21:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:21:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:21:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:21:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:21:14,254 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:21:14,254 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 11:21:14,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:21:14 BoogieIcfgContainer [2020-08-18 11:21:14,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:21:14,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:21:14,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:21:14,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:21:14,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:21:12" (1/3) ... [2020-08-18 11:21:14,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a9d1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:21:14, skipping insertion in model container [2020-08-18 11:21:14,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:13" (2/3) ... [2020-08-18 11:21:14,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a9d1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:21:14, skipping insertion in model container [2020-08-18 11:21:14,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:21:14" (3/3) ... [2020-08-18 11:21:14,273 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-18 11:21:14,284 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:21:14,292 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:21:14,306 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:21:14,331 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:21:14,332 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:21:14,332 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:21:14,332 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:21:14,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:21:14,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:21:14,333 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:21:14,333 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:21:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-18 11:21:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 11:21:14,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:14,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:14,360 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-18 11:21:14,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:14,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041499138] [2020-08-18 11:21:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:14,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:14,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041499138] [2020-08-18 11:21:14,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:14,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:21:14,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519850627] [2020-08-18 11:21:14,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:21:14,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:21:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:21:14,721 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-18 11:21:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:15,107 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-18 11:21:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:21:15,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-18 11:21:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:15,129 INFO L225 Difference]: With dead ends: 90 [2020-08-18 11:21:15,129 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 11:21:15,136 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 [2020-08-18 11:21:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 11:21:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-18 11:21:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 11:21:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-18 11:21:15,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-18 11:21:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:15,222 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-18 11:21:15,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:21:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-18 11:21:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 11:21:15,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:15,229 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] [2020-08-18 11:21:15,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:21:15,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:15,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-18 11:21:15,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:15,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150204884] [2020-08-18 11:21:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 11:21:15,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150204884] [2020-08-18 11:21:15,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:15,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:21:15,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261975345] [2020-08-18 11:21:15,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:21:15,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:21:15,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:21:15,526 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-18 11:21:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:15,748 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-18 11:21:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:21:15,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-18 11:21:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:15,751 INFO L225 Difference]: With dead ends: 69 [2020-08-18 11:21:15,752 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 11:21:15,753 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 [2020-08-18 11:21:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 11:21:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 11:21:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 11:21:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-18 11:21:15,766 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-18 11:21:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:15,766 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-18 11:21:15,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:21:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-18 11:21:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 11:21:15,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:15,768 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] [2020-08-18 11:21:15,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:21:15,769 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-18 11:21:15,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:15,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672814071] [2020-08-18 11:21:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:15,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 11:21:16,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672814071] [2020-08-18 11:21:16,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:16,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:21:16,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921894466] [2020-08-18 11:21:16,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:21:16,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:21:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:21:16,011 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-18 11:21:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:16,187 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-18 11:21:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:21:16,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-18 11:21:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:16,189 INFO L225 Difference]: With dead ends: 71 [2020-08-18 11:21:16,189 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 11:21:16,190 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 [2020-08-18 11:21:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 11:21:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-18 11:21:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 11:21:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-18 11:21:16,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-18 11:21:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:16,199 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-18 11:21:16,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:21:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-18 11:21:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 11:21:16,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:16,201 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] [2020-08-18 11:21:16,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:21:16,201 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:16,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-18 11:21:16,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:16,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510903322] [2020-08-18 11:21:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 11:21:16,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510903322] [2020-08-18 11:21:16,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:16,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 11:21:16,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841987713] [2020-08-18 11:21:16,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 11:21:16,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:16,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 11:21:16,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:21:16,554 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-18 11:21:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:17,424 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-18 11:21:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 11:21:17,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-18 11:21:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:17,427 INFO L225 Difference]: With dead ends: 77 [2020-08-18 11:21:17,427 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 11:21:17,428 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 [2020-08-18 11:21:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 11:21:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-18 11:21:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 11:21:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-18 11:21:17,442 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-18 11:21:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:17,443 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-18 11:21:17,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 11:21:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-18 11:21:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 11:21:17,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:17,444 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] [2020-08-18 11:21:17,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:21:17,445 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:17,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-18 11:21:17,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:17,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284604098] [2020-08-18 11:21:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:21:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 11:21:17,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284604098] [2020-08-18 11:21:17,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:17,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 11:21:17,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477898780] [2020-08-18 11:21:17,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 11:21:17,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:17,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 11:21:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-18 11:21:17,852 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-18 11:21:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:19,087 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-18 11:21:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 11:21:19,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-18 11:21:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:19,090 INFO L225 Difference]: With dead ends: 80 [2020-08-18 11:21:19,090 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 11:21:19,092 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 [2020-08-18 11:21:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 11:21:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-18 11:21:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 11:21:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-18 11:21:19,106 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-18 11:21:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:19,106 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-18 11:21:19,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 11:21:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-18 11:21:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 11:21:19,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:19,108 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] [2020-08-18 11:21:19,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:21:19,108 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-18 11:21:19,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:19,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628699336] [2020-08-18 11:21:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:21:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 11:21:19,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628699336] [2020-08-18 11:21:19,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:19,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 11:21:19,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516605121] [2020-08-18 11:21:19,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 11:21:19,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 11:21:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-18 11:21:19,365 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-18 11:21:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:20,146 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-18 11:21:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 11:21:20,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-18 11:21:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:20,149 INFO L225 Difference]: With dead ends: 79 [2020-08-18 11:21:20,149 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 11:21:20,151 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 [2020-08-18 11:21:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 11:21:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 11:21:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 11:21:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-18 11:21:20,161 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-18 11:21:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:20,162 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-18 11:21:20,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 11:21:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-18 11:21:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:21:20,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:20,164 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] [2020-08-18 11:21:20,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:21:20,164 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-18 11:21:20,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:20,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742720829] [2020-08-18 11:21:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:21:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:21:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:21:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 11:21:20,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742720829] [2020-08-18 11:21:20,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:20,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 11:21:20,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007164923] [2020-08-18 11:21:20,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 11:21:20,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 11:21:20,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-18 11:21:20,537 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-18 11:21:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:21,646 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-18 11:21:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 11:21:21,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-18 11:21:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:21,648 INFO L225 Difference]: With dead ends: 74 [2020-08-18 11:21:21,649 INFO L226 Difference]: Without dead ends: 71 [2020-08-18 11:21:21,650 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 [2020-08-18 11:21:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-18 11:21:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-18 11:21:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 11:21:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-18 11:21:21,675 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-18 11:21:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:21,676 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-18 11:21:21,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 11:21:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-18 11:21:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:21:21,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:21,681 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] [2020-08-18 11:21:21,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:21:21,681 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-18 11:21:21,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:21,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944495643] [2020-08-18 11:21:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:21,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:21,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:21,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:21,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:22,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:21:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:22,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:21:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:22,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:21:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 11:21:22,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944495643] [2020-08-18 11:21:22,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:22,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 11:21:22,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068473252] [2020-08-18 11:21:22,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 11:21:22,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 11:21:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-18 11:21:22,141 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-18 11:21:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:23,152 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 11:21:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 11:21:23,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-18 11:21:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:23,154 INFO L225 Difference]: With dead ends: 84 [2020-08-18 11:21:23,155 INFO L226 Difference]: Without dead ends: 71 [2020-08-18 11:21:23,157 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 [2020-08-18 11:21:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-18 11:21:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-18 11:21:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 11:21:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-18 11:21:23,169 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-18 11:21:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:23,170 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-18 11:21:23,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 11:21:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-18 11:21:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:21:23,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:23,171 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] [2020-08-18 11:21:23,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:21:23,172 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-18 11:21:23,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:23,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497021483] [2020-08-18 11:21:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:21:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:21:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:21:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 11:21:23,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497021483] [2020-08-18 11:21:23,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:23,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:21:23,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946533725] [2020-08-18 11:21:23,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:21:23,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:21:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:21:23,375 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-18 11:21:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:23,787 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-18 11:21:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:21:23,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-18 11:21:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:23,789 INFO L225 Difference]: With dead ends: 81 [2020-08-18 11:21:23,789 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 11:21:23,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:21:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 11:21:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 11:21:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 11:21:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-18 11:21:23,811 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-18 11:21:23,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:23,812 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-18 11:21:23,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:21:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-18 11:21:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:21:23,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:23,818 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] [2020-08-18 11:21:23,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:21:23,819 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:23,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:23,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-18 11:21:23,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:23,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831971926] [2020-08-18 11:21:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:23,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:21:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 11:21:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:21:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:21:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:21:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:21:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 11:21:24,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831971926] [2020-08-18 11:21:24,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:24,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 11:21:24,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875619782] [2020-08-18 11:21:24,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 11:21:24,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 11:21:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:21:24,147 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-18 11:21:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:24,994 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-18 11:21:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 11:21:24,995 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-18 11:21:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:24,996 INFO L225 Difference]: With dead ends: 93 [2020-08-18 11:21:24,996 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 11:21:24,997 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 [2020-08-18 11:21:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 11:21:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-18 11:21:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 11:21:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-18 11:21:25,007 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-18 11:21:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:25,008 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-18 11:21:25,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 11:21:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-18 11:21:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-18 11:21:25,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:25,009 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] [2020-08-18 11:21:25,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:21:25,010 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:25,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-18 11:21:25,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:25,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484219553] [2020-08-18 11:21:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:21:25,031 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:21:25,031 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:21:25,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:21:25,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:21:25 BoogieIcfgContainer [2020-08-18 11:21:25,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:21:25,064 INFO L168 Benchmark]: Toolchain (without parser) took 12203.53 ms. Allocated memory was 141.0 MB in the beginning and 373.8 MB in the end (delta: 232.8 MB). Free memory was 102.7 MB in the beginning and 269.4 MB in the end (delta: -166.7 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:25,065 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-18 11:21:25,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.92 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 102.5 MB in the beginning and 166.2 MB in the end (delta: -63.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:25,068 INFO L168 Benchmark]: Boogie Preprocessor took 56.06 ms. Allocated memory is still 203.9 MB. Free memory was 166.2 MB in the beginning and 163.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:25,070 INFO L168 Benchmark]: RCFGBuilder took 651.24 ms. Allocated memory is still 203.9 MB. Free memory was 163.6 MB in the beginning and 117.4 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:25,070 INFO L168 Benchmark]: TraceAbstraction took 10795.95 ms. Allocated memory was 203.9 MB in the beginning and 373.8 MB in the end (delta: 169.9 MB). Free memory was 116.8 MB in the beginning and 269.4 MB in the end (delta: -152.7 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-18 11:21:25,079 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 695.92 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 102.5 MB in the beginning and 166.2 MB in the end (delta: -63.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.06 ms. Allocated memory is still 203.9 MB. Free memory was 166.2 MB in the beginning and 163.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 651.24 ms. Allocated memory is still 203.9 MB. Free memory was 163.6 MB in the beginning and 117.4 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10795.95 ms. Allocated memory was 203.9 MB in the beginning and 373.8 MB in the end (delta: 169.9 MB). Free memory was 116.8 MB in the beginning and 269.4 MB in the end (delta: -152.7 MB). Peak memory consumption was 17.2 MB. 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: 10.7s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 7.1s, 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, 3.3s 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 48 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s 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...