/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:18:01,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:18:01,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:18:01,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:18:01,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:18:01,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:18:01,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:18:01,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:18:01,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:18:02,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:18:02,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:18:02,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:18:02,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:18:02,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:18:02,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:18:02,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:18:02,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:18:02,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:18:02,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:18:02,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:18:02,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:18:02,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:18:02,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:18:02,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:18:02,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:18:02,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:18:02,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:18:02,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:18:02,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:18:02,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:18:02,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:18:02,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:18:02,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:18:02,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:18:02,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:18:02,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:18:02,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:18:02,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:18:02,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:18:02,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:18:02,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:18:02,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:18:02,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:18:02,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:18:02,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:18:02,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:18:02,106 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:18:02,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:18:02,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:18:02,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:18:02,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:18:02,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:18:02,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:18:02,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:18:02,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:18:02,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:18:02,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:18:02,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:18:02,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:18:02,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:18:02,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:18:02,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:18:02,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:18:02,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:02,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:18:02,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:18:02,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:18:02,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:18:02,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:18:02,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:18:02,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:18:02,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:18:02,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:18:02,450 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:18:02,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:18:02,456 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:18:02,456 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:18:02,457 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 16:18:02,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b405b4ee/ef65626f1d2a4057a694e4a59d7bab4d/FLAGca50b4f77 [2020-08-18 16:18:03,074 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:18:03,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-18 16:18:03,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b405b4ee/ef65626f1d2a4057a694e4a59d7bab4d/FLAGca50b4f77 [2020-08-18 16:18:03,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b405b4ee/ef65626f1d2a4057a694e4a59d7bab4d [2020-08-18 16:18:03,371 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:18:03,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:18:03,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:03,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:18:03,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:18:03,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:03" (1/1) ... [2020-08-18 16:18:03,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bae0244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:03, skipping insertion in model container [2020-08-18 16:18:03,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:03" (1/1) ... [2020-08-18 16:18:03,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:18:03,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:18:04,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:04,091 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:18:04,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:04,227 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:18:04,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04 WrapperNode [2020-08-18 16:18:04,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:04,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:18:04,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:18:04,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:18:04,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... [2020-08-18 16:18:04,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:18:04,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:18:04,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:18:04,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:18:04,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:18:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:18:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:18:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 16:18:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 16:18:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 16:18:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 16:18:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 16:18:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 16:18:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 16:18:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 16:18:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 16:18:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 16:18:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 16:18:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 16:18:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 16:18:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 16:18:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 16:18:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 16:18:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 16:18:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 16:18:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 16:18:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 16:18:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 16:18:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 16:18:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 16:18:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 16:18:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 16:18:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 16:18:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 16:18:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 16:18:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 16:18:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 16:18:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 16:18:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 16:18:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 16:18:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 16:18:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:18:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 16:18:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 16:18:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:18:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 16:18:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 16:18:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 16:18:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 16:18:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 16:18:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 16:18:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 16:18:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 16:18:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 16:18:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 16:18:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 16:18:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 16:18:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 16:18:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 16:18:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 16:18:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 16:18:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 16:18:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 16:18:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 16:18:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 16:18:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 16:18:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 16:18:04,421 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 16:18:04,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 16:18:04,421 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 16:18:04,421 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 16:18:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 16:18:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 16:18:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 16:18:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 16:18:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 16:18:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 16:18:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:18:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:18:05,108 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:18:05,109 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-18 16:18:05,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:05 BoogieIcfgContainer [2020-08-18 16:18:05,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:18:05,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:18:05,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:18:05,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:18:05,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:18:03" (1/3) ... [2020-08-18 16:18:05,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dada459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:05, skipping insertion in model container [2020-08-18 16:18:05,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:04" (2/3) ... [2020-08-18 16:18:05,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dada459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:05, skipping insertion in model container [2020-08-18 16:18:05,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:05" (3/3) ... [2020-08-18 16:18:05,125 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-18 16:18:05,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:18:05,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-18 16:18:05,160 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-18 16:18:05,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:18:05,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:18:05,193 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:18:05,193 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:18:05,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:18:05,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:18:05,194 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:18:05,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:18:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-18 16:18:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-18 16:18:05,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:05,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:05,225 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:05,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-18 16:18:05,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:05,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928158997] [2020-08-18 16:18:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:05,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:05,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928158997] [2020-08-18 16:18:05,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:05,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:18:05,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072033728] [2020-08-18 16:18:05,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:18:05,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:18:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:05,511 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-18 16:18:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:05,828 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-18 16:18:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:18:05,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-18 16:18:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:05,857 INFO L225 Difference]: With dead ends: 186 [2020-08-18 16:18:05,857 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 16:18:05,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 16:18:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-18 16:18:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 16:18:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 16:18:05,943 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-18 16:18:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:05,944 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 16:18:05,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:18:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 16:18:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:18:05,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:05,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:05,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:18:05,947 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:05,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-18 16:18:05,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:05,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130205104] [2020-08-18 16:18:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:06,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:06,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130205104] [2020-08-18 16:18:06,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:06,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:18:06,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861205667] [2020-08-18 16:18:06,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:18:06,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:06,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:18:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:06,084 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-18 16:18:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:06,265 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-18 16:18:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:18:06,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 16:18:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:06,267 INFO L225 Difference]: With dead ends: 84 [2020-08-18 16:18:06,268 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 16:18:06,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 16:18:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-18 16:18:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 16:18:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-18 16:18:06,278 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-18 16:18:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:06,279 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-18 16:18:06,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:18:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-18 16:18:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:18:06,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:06,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:06,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:18:06,280 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-18 16:18:06,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:06,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989471436] [2020-08-18 16:18:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:06,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:06,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989471436] [2020-08-18 16:18:06,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:06,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:06,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486915966] [2020-08-18 16:18:06,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:06,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:06,398 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-18 16:18:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:06,632 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-18 16:18:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:18:06,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 16:18:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:06,634 INFO L225 Difference]: With dead ends: 138 [2020-08-18 16:18:06,634 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 16:18:06,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 16:18:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-18 16:18:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 16:18:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-18 16:18:06,655 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-18 16:18:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:06,655 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-18 16:18:06,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-18 16:18:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:18:06,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:06,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:06,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:18:06,662 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-18 16:18:06,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:06,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988201356] [2020-08-18 16:18:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:06,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:06,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988201356] [2020-08-18 16:18:06,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:06,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:06,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130338259] [2020-08-18 16:18:06,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:06,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:06,783 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-18 16:18:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:06,967 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 16:18:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:18:06,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 16:18:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:06,969 INFO L225 Difference]: With dead ends: 84 [2020-08-18 16:18:06,970 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 16:18:06,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 16:18:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 16:18:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 16:18:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-18 16:18:06,977 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-18 16:18:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:06,978 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-18 16:18:06,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-18 16:18:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:18:06,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:06,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:06,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:18:06,979 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:06,980 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-18 16:18:06,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:06,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885715306] [2020-08-18 16:18:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:07,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885715306] [2020-08-18 16:18:07,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:07,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:07,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534418119] [2020-08-18 16:18:07,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:07,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:07,039 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-18 16:18:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:07,256 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-18 16:18:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:18:07,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 16:18:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:07,258 INFO L225 Difference]: With dead ends: 199 [2020-08-18 16:18:07,258 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 16:18:07,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 16:18:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-18 16:18:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 16:18:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-18 16:18:07,280 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-18 16:18:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:07,282 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-18 16:18:07,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-18 16:18:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:18:07,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:07,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:07,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:18:07,284 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-18 16:18:07,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:07,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624403842] [2020-08-18 16:18:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:07,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624403842] [2020-08-18 16:18:07,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:07,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:07,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048639944] [2020-08-18 16:18:07,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:07,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:07,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:07,389 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-18 16:18:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:07,592 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-18 16:18:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:18:07,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 16:18:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:07,593 INFO L225 Difference]: With dead ends: 126 [2020-08-18 16:18:07,593 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 16:18:07,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 16:18:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-18 16:18:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 16:18:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-18 16:18:07,603 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-18 16:18:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:07,604 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-18 16:18:07,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-18 16:18:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:18:07,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:07,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:07,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:18:07,605 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-18 16:18:07,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:07,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95116027] [2020-08-18 16:18:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:07,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95116027] [2020-08-18 16:18:07,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:07,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:07,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712103680] [2020-08-18 16:18:07,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:07,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:07,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:07,657 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-18 16:18:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:07,856 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-18 16:18:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:18:07,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 16:18:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:07,857 INFO L225 Difference]: With dead ends: 136 [2020-08-18 16:18:07,857 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 16:18:07,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 16:18:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-18 16:18:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 16:18:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-18 16:18:07,865 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-18 16:18:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:07,865 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-18 16:18:07,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-18 16:18:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:18:07,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:07,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:07,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:18:07,867 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-18 16:18:07,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:07,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660425927] [2020-08-18 16:18:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:07,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660425927] [2020-08-18 16:18:07,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:07,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:18:07,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444740035] [2020-08-18 16:18:07,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:18:07,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:18:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:07,945 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-18 16:18:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:08,073 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-18 16:18:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:18:08,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-18 16:18:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:08,075 INFO L225 Difference]: With dead ends: 141 [2020-08-18 16:18:08,076 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 16:18:08,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 16:18:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-18 16:18:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 16:18:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-18 16:18:08,083 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-18 16:18:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:08,083 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-18 16:18:08,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:18:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-18 16:18:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:18:08,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:08,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:08,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:18:08,085 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-18 16:18:08,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:08,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91267465] [2020-08-18 16:18:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:08,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:08,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91267465] [2020-08-18 16:18:08,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:08,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:18:08,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421616079] [2020-08-18 16:18:08,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:18:08,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:08,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:18:08,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:08,134 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-18 16:18:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:08,255 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-18 16:18:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:18:08,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 16:18:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:08,257 INFO L225 Difference]: With dead ends: 79 [2020-08-18 16:18:08,257 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 16:18:08,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 16:18:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-18 16:18:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 16:18:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-18 16:18:08,267 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-18 16:18:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:08,268 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-18 16:18:08,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:18:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-18 16:18:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:18:08,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:08,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:08,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:18:08,270 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:08,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-18 16:18:08,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:08,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017761598] [2020-08-18 16:18:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:08,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:08,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017761598] [2020-08-18 16:18:08,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:08,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:08,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739328900] [2020-08-18 16:18:08,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:08,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:08,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:08,343 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-18 16:18:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:08,480 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-18 16:18:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:18:08,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 16:18:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:08,482 INFO L225 Difference]: With dead ends: 78 [2020-08-18 16:18:08,482 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 16:18:08,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 16:18:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-18 16:18:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 16:18:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-18 16:18:08,487 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-18 16:18:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:08,487 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-18 16:18:08,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-18 16:18:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:18:08,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:08,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:08,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:18:08,489 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:08,490 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-18 16:18:08,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:08,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144364645] [2020-08-18 16:18:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:08,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:08,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144364645] [2020-08-18 16:18:08,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:08,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:08,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914462820] [2020-08-18 16:18:08,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:08,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:08,564 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-18 16:18:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:08,880 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-18 16:18:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:18:08,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 16:18:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:08,882 INFO L225 Difference]: With dead ends: 179 [2020-08-18 16:18:08,882 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 16:18:08,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:18:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 16:18:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-18 16:18:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 16:18:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-18 16:18:08,892 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-18 16:18:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:08,892 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-18 16:18:08,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-18 16:18:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:18:08,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:08,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:08,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 16:18:08,894 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-18 16:18:08,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:08,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453988141] [2020-08-18 16:18:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:09,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:09,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453988141] [2020-08-18 16:18:09,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:09,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:18:09,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312665624] [2020-08-18 16:18:09,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:18:09,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:09,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:18:09,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:18:09,280 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-18 16:18:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:10,095 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-18 16:18:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 16:18:10,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 16:18:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:10,100 INFO L225 Difference]: With dead ends: 182 [2020-08-18 16:18:10,100 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 16:18:10,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 16:18:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 16:18:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-18 16:18:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 16:18:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-18 16:18:10,110 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-18 16:18:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:10,111 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-18 16:18:10,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:18:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-18 16:18:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:18:10,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:10,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:10,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 16:18:10,112 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:10,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:10,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-18 16:18:10,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:10,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820620126] [2020-08-18 16:18:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:10,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 16:18:10,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820620126] [2020-08-18 16:18:10,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:10,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:10,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017235840] [2020-08-18 16:18:10,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:10,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:10,165 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-18 16:18:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:10,376 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-18 16:18:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:18:10,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 16:18:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:10,378 INFO L225 Difference]: With dead ends: 150 [2020-08-18 16:18:10,378 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 16:18:10,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 16:18:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-18 16:18:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 16:18:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-18 16:18:10,391 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-18 16:18:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:10,392 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-18 16:18:10,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-18 16:18:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:18:10,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:10,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:10,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 16:18:10,400 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-18 16:18:10,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:10,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125602185] [2020-08-18 16:18:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:10,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 16:18:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125602185] [2020-08-18 16:18:10,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:10,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:18:10,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040948179] [2020-08-18 16:18:10,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:18:10,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:10,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:18:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:10,480 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-18 16:18:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:10,644 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-18 16:18:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:18:10,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-18 16:18:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:10,646 INFO L225 Difference]: With dead ends: 124 [2020-08-18 16:18:10,646 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 16:18:10,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 16:18:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-18 16:18:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 16:18:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-18 16:18:10,658 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-18 16:18:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:10,659 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-18 16:18:10,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:18:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-18 16:18:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:18:10,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:10,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:10,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 16:18:10,660 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:10,661 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-18 16:18:10,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:10,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266839457] [2020-08-18 16:18:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:18:10,681 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:18:10,681 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:18:10,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 16:18:10,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:18:10 BoogieIcfgContainer [2020-08-18 16:18:10,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:18:10,737 INFO L168 Benchmark]: Toolchain (without parser) took 7361.40 ms. Allocated memory was 148.9 MB in the beginning and 277.3 MB in the end (delta: 128.5 MB). Free memory was 103.8 MB in the beginning and 156.9 MB in the end (delta: -53.1 MB). Peak memory consumption was 75.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:10,737 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:18:10,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 853.78 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 103.6 MB in the beginning and 171.0 MB in the end (delta: -67.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:10,739 INFO L168 Benchmark]: Boogie Preprocessor took 101.00 ms. Allocated memory is still 204.5 MB. Free memory was 171.0 MB in the beginning and 167.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:10,739 INFO L168 Benchmark]: RCFGBuilder took 784.41 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 111.4 MB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:10,740 INFO L168 Benchmark]: TraceAbstraction took 5616.89 ms. Allocated memory was 204.5 MB in the beginning and 277.3 MB in the end (delta: 72.9 MB). Free memory was 111.4 MB in the beginning and 156.9 MB in the end (delta: -45.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:10,749 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 853.78 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 103.6 MB in the beginning and 171.0 MB in the end (delta: -67.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.00 ms. Allocated memory is still 204.5 MB. Free memory was 171.0 MB in the beginning and 167.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 784.41 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 111.4 MB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5616.89 ms. Allocated memory was 204.5 MB in the beginning and 277.3 MB in the end (delta: 72.9 MB). Free memory was 111.4 MB in the beginning and 156.9 MB in the end (delta: -45.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, 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, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...