/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:59:14,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:59:14,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:59:14,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:59:14,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:59:14,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:59:14,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:59:14,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:59:14,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:59:14,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:59:14,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:59:14,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:59:14,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:59:14,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:59:14,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:59:14,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:59:14,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:59:14,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:59:14,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:59:14,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:59:14,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:59:14,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:59:14,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:59:14,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:59:14,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:59:14,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:59:14,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:59:14,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:59:14,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:59:14,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:59:14,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:59:14,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:59:14,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:59:14,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:59:14,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:59:14,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:59:14,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:59:14,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:59:14,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:59:14,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:59:14,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:59:14,397 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 [2020-08-19 01:59:14,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:59:14,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:59:14,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:59:14,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:59:14,439 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:59:14,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:59:14,440 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:59:14,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:59:14,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:59:14,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:59:14,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:59:14,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:59:14,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:59:14,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:59:14,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:59:14,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:59:14,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:59:14,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:59:14,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:59:14,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:59:14,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:59:14,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:59:14,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:59:14,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:59:14,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:59:14,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:59:14,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:59:14,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:59:14,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:59:14,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:59:14,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:59:14,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:59:14,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:59:14,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:59:14,733 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:59:14,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-08-19 01:59:14,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d27beb12a/1a4f7156b1f246d7a91a300d57cbb829/FLAG637165515 [2020-08-19 01:59:15,349 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:59:15,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-08-19 01:59:15,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d27beb12a/1a4f7156b1f246d7a91a300d57cbb829/FLAG637165515 [2020-08-19 01:59:15,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d27beb12a/1a4f7156b1f246d7a91a300d57cbb829 [2020-08-19 01:59:15,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:59:15,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:59:15,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:59:15,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:59:15,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:59:15,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:59:15" (1/1) ... [2020-08-19 01:59:15,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17afc2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:15, skipping insertion in model container [2020-08-19 01:59:15,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:59:15" (1/1) ... [2020-08-19 01:59:15,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:59:15,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:59:16,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:59:16,187 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:59:16,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:59:16,283 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:59:16,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16 WrapperNode [2020-08-19 01:59:16,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:59:16,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:59:16,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:59:16,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:59:16,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (1/1) ... [2020-08-19 01:59:16,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:59:16,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:59:16,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:59:16,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:59:16,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (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 [2020-08-19 01:59:16,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:59:16,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:59:16,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:59:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-19 01:59:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-19 01:59:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-19 01:59:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-19 01:59:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-19 01:59:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-19 01:59:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-19 01:59:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-19 01:59:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-19 01:59:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-19 01:59:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-19 01:59:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-19 01:59:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-19 01:59:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-19 01:59:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-19 01:59:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-19 01:59:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-19 01:59:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-19 01:59:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-19 01:59:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-19 01:59:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-19 01:59:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-19 01:59:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-19 01:59:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-19 01:59:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-19 01:59:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-19 01:59:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-19 01:59:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-19 01:59:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-19 01:59:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-19 01:59:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-19 01:59:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-19 01:59:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 01:59:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-19 01:59:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-19 01:59:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 01:59:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-19 01:59:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-19 01:59:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-19 01:59:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-19 01:59:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-19 01:59:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 01:59:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-19 01:59:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-19 01:59:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-19 01:59:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 01:59:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-19 01:59:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-19 01:59:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-19 01:59:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-19 01:59:16,433 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-19 01:59:16,433 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-19 01:59:16,434 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-19 01:59:16,434 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-19 01:59:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-19 01:59:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-19 01:59:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-19 01:59:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-19 01:59:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-19 01:59:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-19 01:59:16,436 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-19 01:59:16,437 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-19 01:59:16,437 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-19 01:59:16,437 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-19 01:59:16,437 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-19 01:59:16,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-19 01:59:16,437 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-19 01:59:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-19 01:59:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:59:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:59:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 01:59:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 01:59:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 01:59:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 01:59:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 01:59:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:59:16,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:59:16,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:59:17,074 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:59:17,075 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-08-19 01:59:17,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:59:17 BoogieIcfgContainer [2020-08-19 01:59:17,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:59:17,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:59:17,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:59:17,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:59:17,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:59:15" (1/3) ... [2020-08-19 01:59:17,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5655854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:59:17, skipping insertion in model container [2020-08-19 01:59:17,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:59:16" (2/3) ... [2020-08-19 01:59:17,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5655854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:59:17, skipping insertion in model container [2020-08-19 01:59:17,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:59:17" (3/3) ... [2020-08-19 01:59:17,087 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-08-19 01:59:17,098 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:59:17,103 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-08-19 01:59:17,113 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-08-19 01:59:17,135 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:59:17,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:59:17,135 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:59:17,135 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:59:17,136 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:59:17,136 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:59:17,136 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:59:17,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:59:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-08-19 01:59:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 01:59:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:17,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:17,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:17,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-08-19 01:59:17,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:17,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518264940] [2020-08-19 01:59:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:17,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:17,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518264940] [2020-08-19 01:59:17,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:17,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:59:17,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374332267] [2020-08-19 01:59:17,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:59:17,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:59:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:59:17,442 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-08-19 01:59:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:17,626 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2020-08-19 01:59:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:59:17,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-19 01:59:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:17,637 INFO L225 Difference]: With dead ends: 98 [2020-08-19 01:59:17,638 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 01:59:17,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:59:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 01:59:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 01:59:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 01:59:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-08-19 01:59:17,684 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 10 [2020-08-19 01:59:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:17,684 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-08-19 01:59:17,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:59:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-08-19 01:59:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-19 01:59:17,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:17,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:17,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:59:17,686 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash -338068956, now seen corresponding path program 1 times [2020-08-19 01:59:17,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:17,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863196563] [2020-08-19 01:59:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:17,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:17,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863196563] [2020-08-19 01:59:17,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:17,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:59:17,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220912506] [2020-08-19 01:59:17,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:59:17,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:59:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:59:17,813 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 5 states. [2020-08-19 01:59:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:18,003 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-08-19 01:59:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:59:18,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-19 01:59:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:18,006 INFO L225 Difference]: With dead ends: 51 [2020-08-19 01:59:18,006 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 01:59:18,007 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 [2020-08-19 01:59:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 01:59:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-19 01:59:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 01:59:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-08-19 01:59:18,015 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 11 [2020-08-19 01:59:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:18,015 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-08-19 01:59:18,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:59:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-08-19 01:59:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 01:59:18,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:18,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:18,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:59:18,017 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-08-19 01:59:18,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:18,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757083598] [2020-08-19 01:59:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:18,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:18,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757083598] [2020-08-19 01:59:18,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:18,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:59:18,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120231175] [2020-08-19 01:59:18,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:59:18,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:59:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:59:18,158 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2020-08-19 01:59:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:18,331 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-08-19 01:59:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:59:18,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-19 01:59:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:18,333 INFO L225 Difference]: With dead ends: 43 [2020-08-19 01:59:18,334 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 01:59:18,336 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 [2020-08-19 01:59:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 01:59:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-19 01:59:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 01:59:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-19 01:59:18,348 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-08-19 01:59:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:18,348 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-19 01:59:18,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:59:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-19 01:59:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 01:59:18,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:18,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:18,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:59:18,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-08-19 01:59:18,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:18,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024312997] [2020-08-19 01:59:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:18,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:18,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024312997] [2020-08-19 01:59:18,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:18,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 01:59:18,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413362759] [2020-08-19 01:59:18,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:59:18,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:59:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:59:18,514 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2020-08-19 01:59:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:18,799 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-08-19 01:59:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:59:18,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-19 01:59:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:18,806 INFO L225 Difference]: With dead ends: 66 [2020-08-19 01:59:18,806 INFO L226 Difference]: Without dead ends: 64 [2020-08-19 01:59:18,807 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 [2020-08-19 01:59:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-19 01:59:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-19 01:59:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 01:59:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-08-19 01:59:18,822 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-08-19 01:59:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:18,823 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-08-19 01:59:18,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:59:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-08-19 01:59:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 01:59:18,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:18,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:18,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:59:18,825 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-08-19 01:59:18,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:18,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570022772] [2020-08-19 01:59:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:18,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570022772] [2020-08-19 01:59:18,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:18,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:59:18,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114680304] [2020-08-19 01:59:18,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:59:18,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:59:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:59:18,969 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-08-19 01:59:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:19,183 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-19 01:59:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:59:19,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-19 01:59:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:19,185 INFO L225 Difference]: With dead ends: 48 [2020-08-19 01:59:19,185 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 01:59:19,185 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 [2020-08-19 01:59:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 01:59:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-19 01:59:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 01:59:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 01:59:19,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-08-19 01:59:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:19,209 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 01:59:19,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:59:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 01:59:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 01:59:19,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:19,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:19,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:59:19,214 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-08-19 01:59:19,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:19,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594949847] [2020-08-19 01:59:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:19,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:19,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594949847] [2020-08-19 01:59:19,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:19,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:59:19,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434534120] [2020-08-19 01:59:19,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:59:19,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:59:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:59:19,296 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-08-19 01:59:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:19,413 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-19 01:59:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:59:19,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-19 01:59:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:19,414 INFO L225 Difference]: With dead ends: 46 [2020-08-19 01:59:19,414 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 01:59:19,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:59:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 01:59:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-19 01:59:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-19 01:59:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-08-19 01:59:19,421 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-08-19 01:59:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:19,421 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-08-19 01:59:19,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:59:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-08-19 01:59:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:59:19,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:19,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:19,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:59:19,423 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-08-19 01:59:19,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:19,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617466885] [2020-08-19 01:59:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:19,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:19,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617466885] [2020-08-19 01:59:19,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:59:19,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 01:59:19,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569490005] [2020-08-19 01:59:19,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:59:19,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:59:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:59:19,529 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-08-19 01:59:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:19,726 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-08-19 01:59:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:59:19,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-19 01:59:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:19,728 INFO L225 Difference]: With dead ends: 59 [2020-08-19 01:59:19,728 INFO L226 Difference]: Without dead ends: 47 [2020-08-19 01:59:19,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:59:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-19 01:59:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-08-19 01:59:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 01:59:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 01:59:19,735 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 18 [2020-08-19 01:59:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:19,735 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 01:59:19,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:59:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 01:59:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:59:19,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:19,736 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:19,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:59:19,737 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-08-19 01:59:19,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:19,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581041703] [2020-08-19 01:59:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:19,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:19,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581041703] [2020-08-19 01:59:19,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:59:19,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 01:59:19,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817030321] [2020-08-19 01:59:19,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:59:19,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:59:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:59:19,836 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-19 01:59:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:20,067 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-08-19 01:59:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:59:20,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-19 01:59:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:20,074 INFO L225 Difference]: With dead ends: 63 [2020-08-19 01:59:20,074 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 01:59:20,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:59:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 01:59:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-19 01:59:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 01:59:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-19 01:59:20,084 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 21 [2020-08-19 01:59:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:20,085 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-19 01:59:20,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:59:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-19 01:59:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:59:20,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:20,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:20,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:59:20,087 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-08-19 01:59:20,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:20,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505302643] [2020-08-19 01:59:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:20,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:20,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505302643] [2020-08-19 01:59:20,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:59:20,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:59:20,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110531981] [2020-08-19 01:59:20,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:59:20,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:20,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:59:20,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:59:20,266 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-08-19 01:59:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:20,542 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-19 01:59:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:59:20,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-19 01:59:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:20,544 INFO L225 Difference]: With dead ends: 42 [2020-08-19 01:59:20,544 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 01:59:20,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:59:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 01:59:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-19 01:59:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 01:59:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-08-19 01:59:20,549 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2020-08-19 01:59:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:20,550 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-08-19 01:59:20,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:59:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-08-19 01:59:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 01:59:20,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:20,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:20,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:59:20,551 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:20,552 INFO L82 PathProgramCache]: Analyzing trace with hash -377613816, now seen corresponding path program 1 times [2020-08-19 01:59:20,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:20,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835910962] [2020-08-19 01:59:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:20,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:20,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835910962] [2020-08-19 01:59:20,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:59:20,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:59:20,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208920051] [2020-08-19 01:59:20,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:59:20,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:20,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:59:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:59:20,810 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 10 states. [2020-08-19 01:59:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:21,497 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-08-19 01:59:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 01:59:21,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-08-19 01:59:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:21,499 INFO L225 Difference]: With dead ends: 120 [2020-08-19 01:59:21,499 INFO L226 Difference]: Without dead ends: 118 [2020-08-19 01:59:21,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:59:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-19 01:59:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 62. [2020-08-19 01:59:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 01:59:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-08-19 01:59:21,508 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 32 [2020-08-19 01:59:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:21,508 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-08-19 01:59:21,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:59:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-08-19 01:59:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 01:59:21,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:21,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:21,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:59:21,510 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash -243600310, now seen corresponding path program 1 times [2020-08-19 01:59:21,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:21,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331911048] [2020-08-19 01:59:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:21,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:21,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331911048] [2020-08-19 01:59:21,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:59:21,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 01:59:21,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266931836] [2020-08-19 01:59:21,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 01:59:21,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 01:59:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:59:21,814 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 13 states. [2020-08-19 01:59:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:22,659 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-08-19 01:59:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 01:59:22,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-08-19 01:59:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:22,663 INFO L225 Difference]: With dead ends: 108 [2020-08-19 01:59:22,664 INFO L226 Difference]: Without dead ends: 96 [2020-08-19 01:59:22,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-08-19 01:59:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-19 01:59:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-08-19 01:59:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 01:59:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-08-19 01:59:22,688 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 32 [2020-08-19 01:59:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:22,689 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-08-19 01:59:22,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 01:59:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-08-19 01:59:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-19 01:59:22,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:22,695 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:22,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:59:22,696 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash 145286649, now seen corresponding path program 2 times [2020-08-19 01:59:22,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:22,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484605921] [2020-08-19 01:59:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:23,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:59:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:59:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:59:23,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484605921] [2020-08-19 01:59:23,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:59:23,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:59:23,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594897634] [2020-08-19 01:59:23,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:59:23,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:59:23,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:59:23,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:59:23,018 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 10 states. [2020-08-19 01:59:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:59:23,801 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-08-19 01:59:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 01:59:23,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-08-19 01:59:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:59:23,803 INFO L225 Difference]: With dead ends: 118 [2020-08-19 01:59:23,803 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 01:59:23,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-08-19 01:59:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 01:59:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-08-19 01:59:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 01:59:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-08-19 01:59:23,821 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 35 [2020-08-19 01:59:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:59:23,827 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-08-19 01:59:23,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:59:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-08-19 01:59:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-19 01:59:23,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:59:23,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:59:23,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:59:23,829 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:59:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:59:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash -969799515, now seen corresponding path program 1 times [2020-08-19 01:59:23,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:59:23,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327669937] [2020-08-19 01:59:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:59:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:59:23,912 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:59:23,913 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:59:23,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:59:23,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:59:23 BoogieIcfgContainer [2020-08-19 01:59:23,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:59:23,964 INFO L168 Benchmark]: Toolchain (without parser) took 8325.37 ms. Allocated memory was 141.6 MB in the beginning and 280.5 MB in the end (delta: 138.9 MB). Free memory was 103.0 MB in the beginning and 124.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:59:23,966 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:59:23,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.22 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 169.0 MB in the end (delta: -66.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-19 01:59:23,968 INFO L168 Benchmark]: Boogie Preprocessor took 66.54 ms. Allocated memory is still 203.9 MB. Free memory was 169.0 MB in the beginning and 166.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:59:23,969 INFO L168 Benchmark]: RCFGBuilder took 728.02 ms. Allocated memory is still 203.9 MB. Free memory was 165.7 MB in the beginning and 113.9 MB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:59:23,970 INFO L168 Benchmark]: TraceAbstraction took 6879.77 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 113.2 MB in the beginning and 124.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:59:23,977 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.22 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 169.0 MB in the end (delta: -66.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.54 ms. Allocated memory is still 203.9 MB. Free memory was 169.0 MB in the beginning and 166.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 728.02 ms. Allocated memory is still 203.9 MB. Free memory was 165.7 MB in the beginning and 113.9 MB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6879.77 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 113.2 MB in the beginning and 124.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); [L988] null->next = ((void*)0) [L989] null->prev = ((void*)0) [L990] null->colour = BLACK [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); [L993] list->next = null [L994] list->prev = null [L995] list->colour = BLACK [L997] struct TSLL* end = list; [L1000] COND TRUE __VERIFIER_nondet_int() [L1003] end->next = malloc(sizeof(struct TSLL)) [L1004] EXPR end->next [L1004] end->next->prev = end [L1005] EXPR end->next [L1005] end = end->next [L1006] end->next = null [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1014] end->colour = RED [L1015] end->next = malloc(sizeof(struct TSLL)) [L1016] EXPR end->next [L1016] end->next->prev = end [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = null [L1019] end->colour = BLACK [L1021] EXPR end->colour [L1021] COND FALSE !(!(BLACK == end->colour)) [L1022] EXPR end->next [L1022] COND FALSE !(!(null == end->next)) [L1023] COND FALSE !(!(null != end)) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1041] EXPR end->next [L1041] end = end->next [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND TRUE RED == end->colour [L1036] EXPR end->next [L1036] end = end->next [L1037] COND FALSE !(!(null != end)) [L1038] EXPR end->colour [L1038] COND TRUE !(BLACK != end->colour) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 407 SDtfs, 469 SDslu, 1103 SDs, 0 SdLazy, 1629 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=11, 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, 12 MinimizatonAttempts, 120 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 84053 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 1/21 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...