/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:51:51,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:51:51,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:51:51,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:51:51,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:51:51,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:51:51,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:51:51,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:51:51,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:51:51,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:51:51,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:51:51,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:51:51,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:51:51,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:51:51,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:51:51,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:51:51,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:51:51,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:51:51,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:51:51,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:51:51,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:51:51,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:51:51,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:51:51,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:51:51,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:51:51,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:51:51,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:51:51,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:51:51,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:51:51,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:51:51,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:51:51,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:51:51,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:51:51,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:51:51,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:51:51,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:51:51,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:51:51,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:51:51,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:51:51,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:51:51,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:51:51,096 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 [2020-08-27 21:51:51,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:51:51,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:51:51,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:51:51,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:51:51,124 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:51:51,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:51:51,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:51:51,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:51:51,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:51:51,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:51:51,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:51:51,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:51:51,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:51:51,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:51:51,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:51:51,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:51:51,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:51:51,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:51:51,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:51:51,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:51:51,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:51:51,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:51:51,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:51:51,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:51:51,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:51:51,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:51:51,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:51:51,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:51:51,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:51:51,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:51:51,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:51:51,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:51:51,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:51:51,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:51:51,667 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:51:51,669 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-27 21:51:51,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0face79ad/be21761f7628423aadfd6334554e9fe2/FLAG1c35ef369 [2020-08-27 21:51:52,490 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:51:52,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-27 21:51:52,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0face79ad/be21761f7628423aadfd6334554e9fe2/FLAG1c35ef369 [2020-08-27 21:51:52,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0face79ad/be21761f7628423aadfd6334554e9fe2 [2020-08-27 21:51:52,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:51:52,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:51:52,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:51:52,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:51:52,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:51:52,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:51:52" (1/1) ... [2020-08-27 21:51:52,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146a98d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:52, skipping insertion in model container [2020-08-27 21:51:52,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:51:52" (1/1) ... [2020-08-27 21:51:52,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:51:52,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:51:53,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:51:53,233 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:51:53,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:51:53,354 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:51:53,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53 WrapperNode [2020-08-27 21:51:53,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:51:53,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:51:53,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:51:53,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:51:53,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (1/1) ... [2020-08-27 21:51:53,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:51:53,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:51:53,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:51:53,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:51:53,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (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 [2020-08-27 21:51:53,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:51:53,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:51:53,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-27 21:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-27 21:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-27 21:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-27 21:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-27 21:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-27 21:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-27 21:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-27 21:51:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-27 21:51:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-27 21:51:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-27 21:51:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-27 21:51:53,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-27 21:51:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-27 21:51:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-27 21:51:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-27 21:51:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-27 21:51:53,549 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-27 21:51:53,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-27 21:51:53,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-27 21:51:53,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-27 21:51:53,549 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-27 21:51:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-27 21:51:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-27 21:51:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-27 21:51:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-27 21:51:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-27 21:51:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-27 21:51:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-27 21:51:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-27 21:51:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-27 21:51:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-27 21:51:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-27 21:51:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-27 21:51:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-27 21:51:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-27 21:51:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-27 21:51:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-27 21:51:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-27 21:51:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-27 21:51:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-27 21:51:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-27 21:51:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-27 21:51:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-27 21:51:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-27 21:51:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-27 21:51:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-27 21:51:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-27 21:51:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-27 21:51:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-27 21:51:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:51:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-27 21:51:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-27 21:51:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:51:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-27 21:51:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-27 21:51:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-27 21:51:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-27 21:51:53,556 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-27 21:51:53,557 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-27 21:51:53,557 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-27 21:51:53,557 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-27 21:51:53,557 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-27 21:51:53,557 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-27 21:51:53,557 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-27 21:51:53,558 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-27 21:51:53,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-27 21:51:53,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-27 21:51:53,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-27 21:51:53,558 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-27 21:51:53,558 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-27 21:51:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-27 21:51:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-27 21:51:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-27 21:51:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-27 21:51:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-27 21:51:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-27 21:51:53,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-27 21:51:53,560 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-27 21:51:53,560 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-27 21:51:53,560 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-27 21:51:53,560 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-27 21:51:53,560 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-27 21:51:53,561 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-27 21:51:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-27 21:51:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-27 21:51:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-27 21:51:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-27 21:51:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-27 21:51:53,562 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:51:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:51:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:51:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:51:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:51:54,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:51:54,365 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-27 21:51:54,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:51:54 BoogieIcfgContainer [2020-08-27 21:51:54,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:51:54,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:51:54,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:51:54,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:51:54,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:51:52" (1/3) ... [2020-08-27 21:51:54,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2e4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:51:54, skipping insertion in model container [2020-08-27 21:51:54,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:51:53" (2/3) ... [2020-08-27 21:51:54,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2e4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:51:54, skipping insertion in model container [2020-08-27 21:51:54,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:51:54" (3/3) ... [2020-08-27 21:51:54,387 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-27 21:51:54,400 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:51:54,411 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-27 21:51:54,435 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-27 21:51:54,474 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:51:54,475 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:51:54,475 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:51:54,475 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:51:54,475 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:51:54,475 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:51:54,476 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:51:54,476 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:51:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-27 21:51:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-27 21:51:54,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:54,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:54,514 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]=== [2020-08-27 21:51:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-27 21:51:54,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:54,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918987315] [2020-08-27 21:51:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:54,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918987315] [2020-08-27 21:51:54,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:54,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:51:54,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130378232] [2020-08-27 21:51:54,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:51:54,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:54,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:51:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:51:54,816 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-27 21:51:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:55,104 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-27 21:51:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:51:55,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-27 21:51:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:55,121 INFO L225 Difference]: With dead ends: 186 [2020-08-27 21:51:55,121 INFO L226 Difference]: Without dead ends: 99 [2020-08-27 21:51:55,127 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 [2020-08-27 21:51:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-27 21:51:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-27 21:51:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-27 21:51:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-27 21:51:55,187 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-27 21:51:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:55,187 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-27 21:51:55,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:51:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-27 21:51:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:51:55,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:55,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:55,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:51:55,189 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]=== [2020-08-27 21:51:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:55,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-27 21:51:55,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:55,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395624852] [2020-08-27 21:51:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:55,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:55,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395624852] [2020-08-27 21:51:55,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:55,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:51:55,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458842641] [2020-08-27 21:51:55,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:51:55,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:51:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:51:55,263 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-27 21:51:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:55,436 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-27 21:51:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:51:55,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-27 21:51:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:55,438 INFO L225 Difference]: With dead ends: 84 [2020-08-27 21:51:55,439 INFO L226 Difference]: Without dead ends: 82 [2020-08-27 21:51:55,440 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 [2020-08-27 21:51:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-27 21:51:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-27 21:51:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-27 21:51:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-27 21:51:55,451 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-27 21:51:55,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:55,452 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-27 21:51:55,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:51:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-27 21:51:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:51:55,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:55,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:55,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:51:55,453 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]=== [2020-08-27 21:51:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-27 21:51:55,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:55,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629576832] [2020-08-27 21:51:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:55,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629576832] [2020-08-27 21:51:55,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:55,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:51:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483617262] [2020-08-27 21:51:55,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:51:55,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:51:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:51:55,547 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-27 21:51:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:55,795 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-27 21:51:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:51:55,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-27 21:51:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:55,801 INFO L225 Difference]: With dead ends: 138 [2020-08-27 21:51:55,801 INFO L226 Difference]: Without dead ends: 136 [2020-08-27 21:51:55,802 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 [2020-08-27 21:51:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-27 21:51:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-27 21:51:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-27 21:51:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-27 21:51:55,823 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-27 21:51:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:55,823 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-27 21:51:55,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:51:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-27 21:51:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:51:55,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:55,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:55,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:51:55,828 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]=== [2020-08-27 21:51:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-27 21:51:55,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:55,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781331308] [2020-08-27 21:51:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:55,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:55,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781331308] [2020-08-27 21:51:55,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:55,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:51:55,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810686514] [2020-08-27 21:51:55,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:51:55,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:51:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:51:55,956 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-27 21:51:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:56,146 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-27 21:51:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:51:56,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-27 21:51:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:56,148 INFO L225 Difference]: With dead ends: 84 [2020-08-27 21:51:56,148 INFO L226 Difference]: Without dead ends: 82 [2020-08-27 21:51:56,149 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 [2020-08-27 21:51:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-27 21:51:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-27 21:51:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-27 21:51:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-27 21:51:56,158 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-27 21:51:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:56,158 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-27 21:51:56,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:51:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-27 21:51:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:51:56,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:56,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:56,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:51:56,160 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]=== [2020-08-27 21:51:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-27 21:51:56,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:56,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882080601] [2020-08-27 21:51:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:56,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:56,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882080601] [2020-08-27 21:51:56,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:56,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:51:56,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464747325] [2020-08-27 21:51:56,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:51:56,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:51:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:51:56,265 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-27 21:51:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:56,498 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-27 21:51:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:51:56,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-27 21:51:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:56,500 INFO L225 Difference]: With dead ends: 199 [2020-08-27 21:51:56,500 INFO L226 Difference]: Without dead ends: 132 [2020-08-27 21:51:56,501 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 [2020-08-27 21:51:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-27 21:51:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-27 21:51:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-27 21:51:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-27 21:51:56,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-27 21:51:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:56,511 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-27 21:51:56,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:51:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-27 21:51:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:51:56,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:56,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:56,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:51:56,512 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]=== [2020-08-27 21:51:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-27 21:51:56,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:56,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83954056] [2020-08-27 21:51:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:56,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83954056] [2020-08-27 21:51:56,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:56,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:51:56,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809996395] [2020-08-27 21:51:56,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:51:56,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:51:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:51:56,605 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-27 21:51:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:56,846 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-27 21:51:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:51:56,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-27 21:51:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:56,848 INFO L225 Difference]: With dead ends: 126 [2020-08-27 21:51:56,848 INFO L226 Difference]: Without dead ends: 122 [2020-08-27 21:51:56,849 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 [2020-08-27 21:51:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-27 21:51:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-27 21:51:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-27 21:51:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-27 21:51:56,871 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-27 21:51:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:56,871 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-27 21:51:56,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:51:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-27 21:51:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:51:56,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:56,876 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] [2020-08-27 21:51:56,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:51:56,877 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]=== [2020-08-27 21:51:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-27 21:51:56,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:56,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055011543] [2020-08-27 21:51:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:56,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:56,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055011543] [2020-08-27 21:51:56,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:56,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:51:56,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023289026] [2020-08-27 21:51:56,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:51:56,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:51:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:51:56,948 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-27 21:51:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:57,146 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-27 21:51:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:51:57,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-27 21:51:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:57,148 INFO L225 Difference]: With dead ends: 136 [2020-08-27 21:51:57,148 INFO L226 Difference]: Without dead ends: 116 [2020-08-27 21:51:57,149 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 [2020-08-27 21:51:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-27 21:51:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-27 21:51:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:51:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-27 21:51:57,156 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-27 21:51:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:57,156 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-27 21:51:57,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:51:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-27 21:51:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:51:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:57,158 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] [2020-08-27 21:51:57,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:51:57,158 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]=== [2020-08-27 21:51:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-27 21:51:57,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:57,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768197348] [2020-08-27 21:51:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:57,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768197348] [2020-08-27 21:51:57,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:57,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:51:57,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351954531] [2020-08-27 21:51:57,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:51:57,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:51:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:51:57,210 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-27 21:51:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:57,345 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-27 21:51:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:51:57,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-27 21:51:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:57,348 INFO L225 Difference]: With dead ends: 141 [2020-08-27 21:51:57,348 INFO L226 Difference]: Without dead ends: 100 [2020-08-27 21:51:57,349 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 [2020-08-27 21:51:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-27 21:51:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-27 21:51:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-27 21:51:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-27 21:51:57,355 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-27 21:51:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:57,355 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-27 21:51:57,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:51:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-27 21:51:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:57,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:57,357 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] [2020-08-27 21:51:57,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:51:57,357 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]=== [2020-08-27 21:51:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-27 21:51:57,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:57,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135373263] [2020-08-27 21:51:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:57,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135373263] [2020-08-27 21:51:57,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:57,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:51:57,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159048837] [2020-08-27 21:51:57,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:51:57,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:51:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:51:57,430 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-27 21:51:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:57,579 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-27 21:51:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:51:57,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-27 21:51:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:57,581 INFO L225 Difference]: With dead ends: 79 [2020-08-27 21:51:57,581 INFO L226 Difference]: Without dead ends: 77 [2020-08-27 21:51:57,581 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 [2020-08-27 21:51:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-27 21:51:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-27 21:51:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-27 21:51:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-27 21:51:57,593 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-27 21:51:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:57,593 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-27 21:51:57,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:51:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-27 21:51:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:51:57,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:57,595 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] [2020-08-27 21:51:57,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:51:57,595 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]=== [2020-08-27 21:51:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-27 21:51:57,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:57,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671150107] [2020-08-27 21:51:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:57,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671150107] [2020-08-27 21:51:57,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:57,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:51:57,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898232622] [2020-08-27 21:51:57,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:51:57,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:51:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:51:57,689 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-27 21:51:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:57,841 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-27 21:51:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:51:57,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-27 21:51:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:57,843 INFO L225 Difference]: With dead ends: 78 [2020-08-27 21:51:57,843 INFO L226 Difference]: Without dead ends: 76 [2020-08-27 21:51:57,844 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 [2020-08-27 21:51:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-27 21:51:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-27 21:51:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-27 21:51:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-27 21:51:57,853 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-27 21:51:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:57,853 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-27 21:51:57,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:51:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-27 21:51:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:51:57,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:57,859 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] [2020-08-27 21:51:57,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:51:57,862 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]=== [2020-08-27 21:51:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:57,863 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-27 21:51:57,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:57,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930658587] [2020-08-27 21:51:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:57,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930658587] [2020-08-27 21:51:57,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:57,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:51:57,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042036139] [2020-08-27 21:51:57,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:51:57,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:57,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:51:57,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:51:57,980 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-27 21:51:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:58,341 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-27 21:51:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:51:58,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-27 21:51:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:58,343 INFO L225 Difference]: With dead ends: 179 [2020-08-27 21:51:58,343 INFO L226 Difference]: Without dead ends: 137 [2020-08-27 21:51:58,344 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 [2020-08-27 21:51:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-27 21:51:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-27 21:51:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-27 21:51:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-27 21:51:58,351 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-27 21:51:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:58,351 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-27 21:51:58,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:51:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-27 21:51:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:51:58,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:58,353 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] [2020-08-27 21:51:58,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:51:58,353 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]=== [2020-08-27 21:51:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-27 21:51:58,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:58,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991833985] [2020-08-27 21:51:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:58,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:58,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991833985] [2020-08-27 21:51:58,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:58,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-27 21:51:58,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876991589] [2020-08-27 21:51:58,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:51:58,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:51:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:51:58,733 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-27 21:51:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:59,603 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-27 21:51:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-27 21:51:59,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-27 21:51:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:59,612 INFO L225 Difference]: With dead ends: 182 [2020-08-27 21:51:59,612 INFO L226 Difference]: Without dead ends: 180 [2020-08-27 21:51:59,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:51:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-27 21:51:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-27 21:51:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-27 21:51:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-27 21:51:59,622 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-27 21:51:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:59,623 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-27 21:51:59,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:51:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-27 21:51:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:51:59,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:59,624 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] [2020-08-27 21:51:59,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:51:59,625 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]=== [2020-08-27 21:51:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-27 21:51:59,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:59,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882266040] [2020-08-27 21:51:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:51:59,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882266040] [2020-08-27 21:51:59,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:59,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:51:59,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128319344] [2020-08-27 21:51:59,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:51:59,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:51:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:51:59,698 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-27 21:51:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:59,946 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-27 21:51:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:51:59,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-27 21:51:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:59,948 INFO L225 Difference]: With dead ends: 150 [2020-08-27 21:51:59,948 INFO L226 Difference]: Without dead ends: 132 [2020-08-27 21:51:59,949 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 [2020-08-27 21:51:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-27 21:51:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-27 21:51:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-27 21:51:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-27 21:51:59,958 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-27 21:51:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:59,959 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-27 21:51:59,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:51:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-27 21:51:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:51:59,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:59,960 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] [2020-08-27 21:51:59,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:51:59,961 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]=== [2020-08-27 21:51:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-27 21:51:59,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:59,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10836569] [2020-08-27 21:51:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:00,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:52:00,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10836569] [2020-08-27 21:52:00,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:00,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:00,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639487048] [2020-08-27 21:52:00,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:00,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:00,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:00,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:00,016 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-27 21:52:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:00,170 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-27 21:52:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:00,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-27 21:52:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:00,172 INFO L225 Difference]: With dead ends: 124 [2020-08-27 21:52:00,172 INFO L226 Difference]: Without dead ends: 122 [2020-08-27 21:52:00,173 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 [2020-08-27 21:52:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-27 21:52:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-27 21:52:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-27 21:52:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-27 21:52:00,199 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-27 21:52:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:00,199 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-27 21:52:00,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-27 21:52:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:52:00,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:00,201 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] [2020-08-27 21:52:00,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:52:00,201 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]=== [2020-08-27 21:52:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-27 21:52:00,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:00,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358273768] [2020-08-27 21:52:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:52:00,220 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:52:00,220 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:52:00,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:52:00,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:52:00 BoogieIcfgContainer [2020-08-27 21:52:00,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:52:00,249 INFO L168 Benchmark]: Toolchain (without parser) took 7593.35 ms. Allocated memory was 144.7 MB in the beginning and 300.9 MB in the end (delta: 156.2 MB). Free memory was 99.5 MB in the beginning and 263.0 MB in the end (delta: -163.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:52:00,250 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:52:00,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.80 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 99.1 MB in the beginning and 169.3 MB in the end (delta: -70.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:00,252 INFO L168 Benchmark]: Boogie Preprocessor took 107.46 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 166.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:00,252 INFO L168 Benchmark]: RCFGBuilder took 910.99 ms. Allocated memory is still 202.4 MB. Free memory was 165.7 MB in the beginning and 110.5 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:00,253 INFO L168 Benchmark]: TraceAbstraction took 5868.07 ms. Allocated memory was 202.4 MB in the beginning and 300.9 MB in the end (delta: 98.6 MB). Free memory was 109.8 MB in the beginning and 263.1 MB in the end (delta: -153.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:52:00,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 699.80 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 99.1 MB in the beginning and 169.3 MB in the end (delta: -70.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.46 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 166.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 910.99 ms. Allocated memory is still 202.4 MB. Free memory was 165.7 MB in the beginning and 110.5 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5868.07 ms. Allocated memory was 202.4 MB in the beginning and 300.9 MB in the end (delta: 98.6 MB). Free memory was 109.8 MB in the beginning and 263.1 MB in the end (delta: -153.3 MB). There was no memory consumed. 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: 5.7s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.7s, 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, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s 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, 1.1s 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...