/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 false -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-eb0fd7c [2020-09-21 10:21:03,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:03,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:03,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:03,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:03,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:03,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:03,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:03,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:03,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:03,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:04,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:04,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:04,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:04,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:04,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:04,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:04,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:04,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:04,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:04,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:04,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:04,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:04,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:04,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:21:04,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:21:04,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:21:04,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:21:04,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:21:04,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:21:04,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:21:04,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:21:04,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:21:04,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:21:04,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:21:04,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:21:04,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:21:04,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:21:04,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:04,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:04,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:04,061 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 [2020-09-21 10:21:04,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:04,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:04,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:04,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:04,107 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:04,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:04,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:04,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:04,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:04,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:04,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:04,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:04,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:04,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:04,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:04,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:04,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:04,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:04,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:04,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:04,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:04,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:04,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:04,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:04,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:04,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:04,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:04,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:04,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:04,113 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 -> false [2020-09-21 10:21:04,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:04,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:04,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:04,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:04,578 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:04,579 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-09-21 10:21:04,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5e6368f0/3de7ad9b3e8a48b4871203b099d25549/FLAG3d7000231 [2020-09-21 10:21:05,314 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:05,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-09-21 10:21:05,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5e6368f0/3de7ad9b3e8a48b4871203b099d25549/FLAG3d7000231 [2020-09-21 10:21:05,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5e6368f0/3de7ad9b3e8a48b4871203b099d25549 [2020-09-21 10:21:05,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:05,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:05,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:05,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:05,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:05,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:05" (1/1) ... [2020-09-21 10:21:05,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1516d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:05, skipping insertion in model container [2020-09-21 10:21:05,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:05" (1/1) ... [2020-09-21 10:21:05,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:05,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:06,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:06,166 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:06,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:06,300 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:06,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06 WrapperNode [2020-09-21 10:21:06,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:06,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:06,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:06,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:06,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... [2020-09-21 10:21:06,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:06,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:06,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:06,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:06,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-21 10:21:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-09-21 10:21:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-09-21 10:21:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-09-21 10:21:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-09-21 10:21:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-21 10:21:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-09-21 10:21:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-09-21 10:21:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-09-21 10:21:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-09-21 10:21:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-09-21 10:21:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-09-21 10:21:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-09-21 10:21:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-09-21 10:21:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-09-21 10:21:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-09-21 10:21:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-09-21 10:21:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-09-21 10:21:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-09-21 10:21:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-09-21 10:21:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-09-21 10:21:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-09-21 10:21:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-09-21 10:21:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-09-21 10:21:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-09-21 10:21:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-09-21 10:21:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-09-21 10:21:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-09-21 10:21:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-09-21 10:21:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-09-21 10:21:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-09-21 10:21:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-09-21 10:21:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-09-21 10:21:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-09-21 10:21:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-09-21 10:21:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-09-21 10:21:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-09-21 10:21:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-09-21 10:21:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:21:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-09-21 10:21:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-09-21 10:21:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-09-21 10:21:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-09-21 10:21:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-09-21 10:21:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-09-21 10:21:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-09-21 10:21:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-09-21 10:21:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-09-21 10:21:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-09-21 10:21:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-09-21 10:21:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-09-21 10:21:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-09-21 10:21:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-09-21 10:21:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-09-21 10:21:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-21 10:21:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-09-21 10:21:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-09-21 10:21:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-09-21 10:21:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-09-21 10:21:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-09-21 10:21:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-09-21 10:21:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-09-21 10:21:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-09-21 10:21:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-09-21 10:21:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-09-21 10:21:06,461 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-09-21 10:21:06,461 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-09-21 10:21:06,461 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-09-21 10:21:06,461 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-09-21 10:21:06,461 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-09-21 10:21:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-09-21 10:21:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-09-21 10:21:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-09-21 10:21:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-09-21 10:21:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-09-21 10:21:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-09-21 10:21:06,463 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-09-21 10:21:06,463 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-09-21 10:21:06,463 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-09-21 10:21:06,463 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-09-21 10:21:06,463 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-09-21 10:21:06,463 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-09-21 10:21:06,464 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-09-21 10:21:06,465 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-09-21 10:21:06,465 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-09-21 10:21:06,465 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-09-21 10:21:06,465 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-09-21 10:21:06,465 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-09-21 10:21:06,465 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-09-21 10:21:06,466 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-09-21 10:21:06,466 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-09-21 10:21:06,466 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-09-21 10:21:06,466 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-09-21 10:21:06,466 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-09-21 10:21:06,466 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-09-21 10:21:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:21:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 10:21:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 10:21:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:21:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 10:21:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-09-21 10:21:06,468 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 10:21:06,468 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-09-21 10:21:06,469 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-09-21 10:21:06,469 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-09-21 10:21:06,469 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-09-21 10:21:06,469 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-09-21 10:21:06,470 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-09-21 10:21:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-09-21 10:21:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-09-21 10:21:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-09-21 10:21:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-09-21 10:21:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-09-21 10:21:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:21:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-09-21 10:21:06,472 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-09-21 10:21:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-09-21 10:21:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-09-21 10:21:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:21:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-21 10:21:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:21:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:21:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:07,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:07,013 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:21:07,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:07 BoogieIcfgContainer [2020-09-21 10:21:07,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:07,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:07,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:07,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:07,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:05" (1/3) ... [2020-09-21 10:21:07,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126bb474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:07, skipping insertion in model container [2020-09-21 10:21:07,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:06" (2/3) ... [2020-09-21 10:21:07,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126bb474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:07, skipping insertion in model container [2020-09-21 10:21:07,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:07" (3/3) ... [2020-09-21 10:21:07,027 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-09-21 10:21:07,039 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:07,049 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:21:07,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:21:07,095 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:07,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:07,096 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:07,096 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:07,096 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:07,096 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:07,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:07,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-21 10:21:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:07,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:07,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:07,126 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-09-21 10:21:07,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:07,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336085101] [2020-09-21 10:21:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:07,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:07,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336085101] [2020-09-21 10:21:07,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:07,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:21:07,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125793699] [2020-09-21 10:21:07,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:21:07,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:07,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:21:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:07,556 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-09-21 10:21:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:08,001 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-09-21 10:21:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:21:08,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-21 10:21:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:08,021 INFO L225 Difference]: With dead ends: 90 [2020-09-21 10:21:08,022 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 10:21:08,030 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 [2020-09-21 10:21:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 10:21:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-09-21 10:21:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:21:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-21 10:21:08,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-09-21 10:21:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:08,119 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-21 10:21:08,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:21:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-21 10:21:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:21:08,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:08,132 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] [2020-09-21 10:21:08,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:08,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-09-21 10:21:08,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:08,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304412310] [2020-09-21 10:21:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 10:21:08,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304412310] [2020-09-21 10:21:08,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:08,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:21:08,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080031619] [2020-09-21 10:21:08,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:21:08,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:08,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:21:08,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:21:08,480 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-09-21 10:21:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:08,713 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-09-21 10:21:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:21:08,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-21 10:21:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:08,717 INFO L225 Difference]: With dead ends: 69 [2020-09-21 10:21:08,717 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:21:08,718 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 [2020-09-21 10:21:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:21:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:21:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:21:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-09-21 10:21:08,733 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-09-21 10:21:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:08,734 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-09-21 10:21:08,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:21:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-09-21 10:21:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:21:08,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:08,736 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] [2020-09-21 10:21:08,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:08,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-09-21 10:21:08,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:08,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029876430] [2020-09-21 10:21:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 10:21:09,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029876430] [2020-09-21 10:21:09,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:09,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:21:09,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369658041] [2020-09-21 10:21:09,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:21:09,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:21:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:21:09,055 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-09-21 10:21:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:09,309 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-09-21 10:21:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:21:09,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-21 10:21:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:09,312 INFO L225 Difference]: With dead ends: 71 [2020-09-21 10:21:09,312 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 10:21:09,313 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 [2020-09-21 10:21:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 10:21:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-09-21 10:21:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:21:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-21 10:21:09,322 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-09-21 10:21:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:09,323 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-21 10:21:09,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:21:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-21 10:21:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:21:09,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:09,324 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] [2020-09-21 10:21:09,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:21:09,325 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:09,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:09,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-09-21 10:21:09,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:09,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917135100] [2020-09-21 10:21:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 10:21:09,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917135100] [2020-09-21 10:21:09,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:09,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:21:09,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002334641] [2020-09-21 10:21:09,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:21:09,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:09,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:21:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:21:09,649 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-09-21 10:21:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:10,669 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-09-21 10:21:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:21:10,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-09-21 10:21:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:10,673 INFO L225 Difference]: With dead ends: 77 [2020-09-21 10:21:10,673 INFO L226 Difference]: Without dead ends: 74 [2020-09-21 10:21:10,674 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 [2020-09-21 10:21:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-21 10:21:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-09-21 10:21:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-21 10:21:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-09-21 10:21:10,690 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-09-21 10:21:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:10,691 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-09-21 10:21:10,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:21:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-09-21 10:21:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:21:10,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:10,693 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] [2020-09-21 10:21:10,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:21:10,693 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-09-21 10:21:10,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:10,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378929233] [2020-09-21 10:21:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:10,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:10,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:11,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:11,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:11,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:21:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:21:11,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378929233] [2020-09-21 10:21:11,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:11,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:21:11,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731873343] [2020-09-21 10:21:11,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:21:11,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:11,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:21:11,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:21:11,235 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-09-21 10:21:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:12,690 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-09-21 10:21:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:21:12,691 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-09-21 10:21:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:12,693 INFO L225 Difference]: With dead ends: 80 [2020-09-21 10:21:12,693 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 10:21:12,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:21:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 10:21:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-21 10:21:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-21 10:21:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-09-21 10:21:12,710 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-09-21 10:21:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:12,711 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-09-21 10:21:12,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:21:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-09-21 10:21:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:21:12,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:12,713 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] [2020-09-21 10:21:12,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:21:12,713 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:12,714 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-09-21 10:21:12,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:12,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724294307] [2020-09-21 10:21:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:12,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:12,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:12,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:12,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:12,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:13,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:21:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:21:13,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724294307] [2020-09-21 10:21:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:21:13,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137892495] [2020-09-21 10:21:13,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:21:13,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:21:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:21:13,055 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-09-21 10:21:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:13,987 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-09-21 10:21:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:21:13,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-09-21 10:21:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:13,990 INFO L225 Difference]: With dead ends: 79 [2020-09-21 10:21:13,990 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 10:21:13,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:21:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 10:21:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-21 10:21:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 10:21:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-09-21 10:21:14,003 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-09-21 10:21:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:14,003 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-09-21 10:21:14,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:21:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-09-21 10:21:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:21:14,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:14,005 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] [2020-09-21 10:21:14,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:21:14,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-09-21 10:21:14,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:14,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381039772] [2020-09-21 10:21:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:21:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:21:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:21:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:21:14,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381039772] [2020-09-21 10:21:14,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:14,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:21:14,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7090117] [2020-09-21 10:21:14,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:21:14,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:21:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:21:14,483 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-09-21 10:21:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:15,700 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-09-21 10:21:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:21:15,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-09-21 10:21:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:15,703 INFO L225 Difference]: With dead ends: 74 [2020-09-21 10:21:15,703 INFO L226 Difference]: Without dead ends: 71 [2020-09-21 10:21:15,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 10:21:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-21 10:21:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-09-21 10:21:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 10:21:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-09-21 10:21:15,716 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-09-21 10:21:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:15,716 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-09-21 10:21:15,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:21:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-09-21 10:21:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:21:15,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:15,719 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] [2020-09-21 10:21:15,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:21:15,719 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:15,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-09-21 10:21:15,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:15,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260776187] [2020-09-21 10:21:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:15,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:15,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:15,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:16,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:21:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:16,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:21:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:16,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:21:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:21:16,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260776187] [2020-09-21 10:21:16,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:16,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:21:16,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932053150] [2020-09-21 10:21:16,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:21:16,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:21:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:21:16,212 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-09-21 10:21:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:17,360 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-09-21 10:21:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:21:17,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-09-21 10:21:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:17,362 INFO L225 Difference]: With dead ends: 84 [2020-09-21 10:21:17,362 INFO L226 Difference]: Without dead ends: 71 [2020-09-21 10:21:17,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:21:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-21 10:21:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-09-21 10:21:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 10:21:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-09-21 10:21:17,374 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-09-21 10:21:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:17,374 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-09-21 10:21:17,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:21:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-09-21 10:21:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:21:17,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:17,376 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] [2020-09-21 10:21:17,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:21:17,377 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-09-21 10:21:17,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:17,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860835000] [2020-09-21 10:21:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:21:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:21:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:21:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 10:21:17,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860835000] [2020-09-21 10:21:17,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:17,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:21:17,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372310812] [2020-09-21 10:21:17,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:21:17,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:21:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:21:17,606 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-09-21 10:21:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:18,095 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-21 10:21:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:21:18,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-09-21 10:21:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:18,097 INFO L225 Difference]: With dead ends: 81 [2020-09-21 10:21:18,097 INFO L226 Difference]: Without dead ends: 69 [2020-09-21 10:21:18,098 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 [2020-09-21 10:21:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-21 10:21:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-21 10:21:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 10:21:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-09-21 10:21:18,125 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-09-21 10:21:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:18,126 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-09-21 10:21:18,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:21:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-09-21 10:21:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:21:18,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:18,128 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] [2020-09-21 10:21:18,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:21:18,130 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-09-21 10:21:18,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:18,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310196503] [2020-09-21 10:21:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:21:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:21:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:21:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:21:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:21:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:21:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 10:21:18,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310196503] [2020-09-21 10:21:18,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:18,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:21:18,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006709597] [2020-09-21 10:21:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:21:18,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:21:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:21:18,508 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-09-21 10:21:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:19,471 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-09-21 10:21:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:21:19,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-09-21 10:21:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:19,474 INFO L225 Difference]: With dead ends: 93 [2020-09-21 10:21:19,474 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 10:21:19,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 10:21:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 10:21:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-09-21 10:21:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:21:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-09-21 10:21:19,486 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-09-21 10:21:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:19,487 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-09-21 10:21:19,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:21:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-09-21 10:21:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 10:21:19,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:19,489 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] [2020-09-21 10:21:19,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:21:19,489 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-09-21 10:21:19,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:19,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572524842] [2020-09-21 10:21:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:21:19,520 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:21:19,521 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:21:19,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:21:19,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:21:19 BoogieIcfgContainer [2020-09-21 10:21:19,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:21:19,554 INFO L168 Benchmark]: Toolchain (without parser) took 13989.02 ms. Allocated memory was 141.6 MB in the beginning and 370.1 MB in the end (delta: 228.6 MB). Free memory was 103.3 MB in the beginning and 271.9 MB in the end (delta: -168.6 MB). Peak memory consumption was 60.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:19,555 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:19,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.66 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 102.6 MB in the beginning and 170.4 MB in the end (delta: -67.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:19,557 INFO L168 Benchmark]: Boogie Preprocessor took 64.51 ms. Allocated memory is still 205.5 MB. Free memory was 170.4 MB in the beginning and 167.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:19,557 INFO L168 Benchmark]: RCFGBuilder took 651.14 ms. Allocated memory is still 205.5 MB. Free memory was 167.3 MB in the beginning and 121.9 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:19,558 INFO L168 Benchmark]: TraceAbstraction took 12531.47 ms. Allocated memory was 205.5 MB in the beginning and 370.1 MB in the end (delta: 164.6 MB). Free memory was 121.3 MB in the beginning and 271.9 MB in the end (delta: -150.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:19,562 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 732.66 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 102.6 MB in the beginning and 170.4 MB in the end (delta: -67.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.51 ms. Allocated memory is still 205.5 MB. Free memory was 170.4 MB in the beginning and 167.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 651.14 ms. Allocated memory is still 205.5 MB. Free memory was 167.3 MB in the beginning and 121.9 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12531.47 ms. Allocated memory was 205.5 MB in the beginning and 370.1 MB in the end (delta: 164.6 MB). Free memory was 121.3 MB in the beginning and 271.9 MB in the end (delta: -150.6 MB). Peak memory consumption was 14.0 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: 12.4s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 377 SDtfs, 460 SDslu, 973 SDs, 0 SdLazy, 5202 SolverSat, 537 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.9s 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, 0.3s SatisfiabilityAnalysisTime, 3.2s 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...