/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:59:17,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:59:17,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:59:17,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:59:17,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:59:17,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:59:17,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:59:17,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:59:17,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:59:17,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:59:17,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:59:17,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:59:17,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:59:17,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:59:17,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:59:17,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:59:17,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:59:17,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:59:17,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:59:17,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:59:17,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:59:17,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:59:17,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:59:17,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:59:17,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:59:17,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:59:17,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:59:17,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:59:17,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:59:17,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:59:17,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:59:17,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:59:17,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:59:17,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:59:17,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:59:17,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:59:17,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:59:17,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:59:17,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:59:17,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:59:17,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:59:17,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:59:17,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:59:17,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:59:17,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:59:17,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:59:17,606 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:59:17,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:59:17,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:59:17,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:59:17,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:59:17,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:59:17,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:59:17,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:59:17,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:59:17,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:59:17,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:59:17,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:59:17,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:59:17,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:59:17,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:59:17,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:59:17,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:59:17,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:17,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:59:17,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:59:17,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:59:17,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:59:17,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:59:17,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:59:17,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:59:17,612 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:59:18,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:59:18,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:59:18,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:59:18,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:59:18,073 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:59:18,074 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-09-24 14:59:18,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270299ea9/bc763843ae8a42cc87b0114aae9b7029/FLAGc2e54f98c [2020-09-24 14:59:18,782 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:59:18,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-09-24 14:59:18,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270299ea9/bc763843ae8a42cc87b0114aae9b7029/FLAGc2e54f98c [2020-09-24 14:59:19,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270299ea9/bc763843ae8a42cc87b0114aae9b7029 [2020-09-24 14:59:19,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:59:19,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:59:19,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:19,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:59:19,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:59:19,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b64989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19, skipping insertion in model container [2020-09-24 14:59:19,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:59:19,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:59:19,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:19,647 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:59:19,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:19,773 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:59:19,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19 WrapperNode [2020-09-24 14:59:19,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:19,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:59:19,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:59:19,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:59:19,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... [2020-09-24 14:59:19,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:59:19,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:59:19,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:59:19,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:59:19,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:19,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:59:19,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:59:19,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:59:19,928 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:59:19,928 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:59:19,928 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:59:19,928 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:59:19,928 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:59:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:59:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:59:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:59:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:59:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:59:19,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:59:19,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:59:19,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:59:19,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:59:19,931 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:59:19,931 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:59:19,931 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:59:19,931 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:59:19,931 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:59:19,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:59:19,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:59:19,932 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:59:19,932 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:59:19,932 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:59:19,932 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:59:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:59:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:59:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:59:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:59:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:59:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:59:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:59:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:59:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:59:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:59:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:59:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:59:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:59:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:59:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:59:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:59:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:59:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:59:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:59:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:59:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:59:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:59:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:59:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 14:59:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:59:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:59:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:59:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:59:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:59:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:59:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:59:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:59:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:59:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:59:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:59:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:59:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:59:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:59:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:59:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:59:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:59:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:59:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:59:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:59:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:59:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:59:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:59:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:59:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:59:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:59:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:59:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:59:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:59:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:59:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:59:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:59:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:59:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:59:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:59:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:59:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:59:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:59:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:59:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:59:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:59:20,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:59:20,698 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-09-24 14:59:20,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:20 BoogieIcfgContainer [2020-09-24 14:59:20,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:59:20,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:59:20,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:59:20,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:59:20,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:59:19" (1/3) ... [2020-09-24 14:59:20,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55133cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:20, skipping insertion in model container [2020-09-24 14:59:20,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:19" (2/3) ... [2020-09-24 14:59:20,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55133cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:20, skipping insertion in model container [2020-09-24 14:59:20,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:20" (3/3) ... [2020-09-24 14:59:20,714 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-09-24 14:59:20,726 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:59:20,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-09-24 14:59:20,757 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-09-24 14:59:20,791 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:59:20,792 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:59:20,792 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:59:20,792 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:59:20,792 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:59:20,792 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:59:20,793 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:59:20,793 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:59:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-09-24 14:59:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 14:59:20,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:20,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:20,834 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]=== [2020-09-24 14:59:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:20,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1523709425, now seen corresponding path program 1 times [2020-09-24 14:59:20,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:20,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566858002] [2020-09-24 14:59:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:21,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:21,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566858002] [2020-09-24 14:59:21,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:21,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:59:21,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772596512] [2020-09-24 14:59:21,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:59:21,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:21,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:59:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:59:21,181 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-09-24 14:59:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:21,476 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2020-09-24 14:59:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:59:21,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-24 14:59:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:21,490 INFO L225 Difference]: With dead ends: 228 [2020-09-24 14:59:21,491 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 14:59:21,496 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 [2020-09-24 14:59:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 14:59:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-09-24 14:59:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 14:59:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-24 14:59:21,547 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 23 [2020-09-24 14:59:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:21,547 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-24 14:59:21,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:59:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-24 14:59:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 14:59:21,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:21,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:21,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:59:21,550 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]=== [2020-09-24 14:59:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1887154194, now seen corresponding path program 1 times [2020-09-24 14:59:21,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:21,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675873865] [2020-09-24 14:59:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:21,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:21,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675873865] [2020-09-24 14:59:21,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:21,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:59:21,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130120803] [2020-09-24 14:59:21,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:59:21,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:21,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:59:21,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:59:21,727 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 8 states. [2020-09-24 14:59:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:22,071 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-09-24 14:59:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:59:22,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-24 14:59:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:22,074 INFO L225 Difference]: With dead ends: 121 [2020-09-24 14:59:22,074 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 14:59:22,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:59:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 14:59:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2020-09-24 14:59:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-24 14:59:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-09-24 14:59:22,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 25 [2020-09-24 14:59:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:22,090 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-09-24 14:59:22,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:59:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-09-24 14:59:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 14:59:22,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:22,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:22,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:59:22,092 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]=== [2020-09-24 14:59:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1939387545, now seen corresponding path program 1 times [2020-09-24 14:59:22,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:22,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325716101] [2020-09-24 14:59:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:22,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:22,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325716101] [2020-09-24 14:59:22,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:22,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 14:59:22,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875263569] [2020-09-24 14:59:22,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:59:22,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:59:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:22,398 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 9 states. [2020-09-24 14:59:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:22,809 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-09-24 14:59:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:59:22,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-09-24 14:59:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:22,811 INFO L225 Difference]: With dead ends: 146 [2020-09-24 14:59:22,811 INFO L226 Difference]: Without dead ends: 143 [2020-09-24 14:59:22,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:59:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-24 14:59:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2020-09-24 14:59:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 14:59:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-09-24 14:59:22,824 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 29 [2020-09-24 14:59:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:22,825 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-09-24 14:59:22,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:59:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-09-24 14:59:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 14:59:22,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:22,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:22,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:59:22,828 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]=== [2020-09-24 14:59:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:22,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1026590761, now seen corresponding path program 1 times [2020-09-24 14:59:22,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:22,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12223249] [2020-09-24 14:59:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:22,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:22,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12223249] [2020-09-24 14:59:22,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:59:22,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599687620] [2020-09-24 14:59:22,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:59:22,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:59:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:59:22,986 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 6 states. [2020-09-24 14:59:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:23,281 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-09-24 14:59:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:59:23,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-24 14:59:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:23,285 INFO L225 Difference]: With dead ends: 140 [2020-09-24 14:59:23,285 INFO L226 Difference]: Without dead ends: 118 [2020-09-24 14:59:23,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:59:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-24 14:59:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2020-09-24 14:59:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-24 14:59:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-09-24 14:59:23,295 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 38 [2020-09-24 14:59:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:23,296 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-09-24 14:59:23,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:59:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-09-24 14:59:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 14:59:23,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:23,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:23,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:59:23,298 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]=== [2020-09-24 14:59:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1637573847, now seen corresponding path program 1 times [2020-09-24 14:59:23,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:23,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251108300] [2020-09-24 14:59:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:23,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:23,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251108300] [2020-09-24 14:59:23,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:23,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:59:23,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846055185] [2020-09-24 14:59:23,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:59:23,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:59:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:59:23,380 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 5 states. [2020-09-24 14:59:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:23,604 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-09-24 14:59:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:59:23,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-24 14:59:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:23,606 INFO L225 Difference]: With dead ends: 115 [2020-09-24 14:59:23,606 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 14:59:23,607 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 [2020-09-24 14:59:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 14:59:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-24 14:59:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 14:59:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-09-24 14:59:23,627 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 38 [2020-09-24 14:59:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:23,628 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-09-24 14:59:23,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:59:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-09-24 14:59:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 14:59:23,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:23,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:23,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:59:23,633 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]=== [2020-09-24 14:59:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1162057661, now seen corresponding path program 1 times [2020-09-24 14:59:23,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:23,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938875581] [2020-09-24 14:59:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:23,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:23,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938875581] [2020-09-24 14:59:23,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:23,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:59:23,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965177097] [2020-09-24 14:59:23,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:59:23,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:23,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:59:23,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:59:23,779 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 5 states. [2020-09-24 14:59:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:24,000 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2020-09-24 14:59:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:59:24,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-09-24 14:59:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:24,002 INFO L225 Difference]: With dead ends: 110 [2020-09-24 14:59:24,003 INFO L226 Difference]: Without dead ends: 107 [2020-09-24 14:59:24,003 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 [2020-09-24 14:59:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-24 14:59:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-09-24 14:59:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 14:59:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-09-24 14:59:24,021 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 42 [2020-09-24 14:59:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:24,022 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-09-24 14:59:24,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:59:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-09-24 14:59:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 14:59:24,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:24,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:24,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:59:24,024 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]=== [2020-09-24 14:59:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:24,025 INFO L82 PathProgramCache]: Analyzing trace with hash -41137780, now seen corresponding path program 1 times [2020-09-24 14:59:24,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:24,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599710525] [2020-09-24 14:59:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:24,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:24,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599710525] [2020-09-24 14:59:24,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:24,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-24 14:59:24,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184592946] [2020-09-24 14:59:24,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:59:24,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:24,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:59:24,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:59:24,316 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 14 states. [2020-09-24 14:59:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:25,053 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-09-24 14:59:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:59:25,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-09-24 14:59:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:25,055 INFO L225 Difference]: With dead ends: 154 [2020-09-24 14:59:25,055 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 14:59:25,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:59:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 14:59:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2020-09-24 14:59:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 14:59:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-09-24 14:59:25,065 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 44 [2020-09-24 14:59:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:25,065 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-09-24 14:59:25,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:59:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-09-24 14:59:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 14:59:25,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:25,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:25,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:59:25,068 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]=== [2020-09-24 14:59:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 784866741, now seen corresponding path program 1 times [2020-09-24 14:59:25,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:25,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446453298] [2020-09-24 14:59:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:25,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446453298] [2020-09-24 14:59:25,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:25,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:59:25,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089534048] [2020-09-24 14:59:25,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:25,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:25,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:25,201 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 7 states. [2020-09-24 14:59:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:25,562 INFO L93 Difference]: Finished difference Result 159 states and 165 transitions. [2020-09-24 14:59:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:59:25,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-09-24 14:59:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:25,564 INFO L225 Difference]: With dead ends: 159 [2020-09-24 14:59:25,564 INFO L226 Difference]: Without dead ends: 120 [2020-09-24 14:59:25,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:59:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-24 14:59:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-09-24 14:59:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 14:59:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-09-24 14:59:25,571 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 45 [2020-09-24 14:59:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:25,572 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-09-24 14:59:25,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-09-24 14:59:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 14:59:25,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:25,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:25,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:59:25,574 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]=== [2020-09-24 14:59:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:25,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1051665877, now seen corresponding path program 1 times [2020-09-24 14:59:25,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:25,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850047573] [2020-09-24 14:59:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:25,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850047573] [2020-09-24 14:59:25,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:25,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 14:59:25,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212801393] [2020-09-24 14:59:25,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:59:25,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:59:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:59:25,995 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 19 states. [2020-09-24 14:59:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:27,401 INFO L93 Difference]: Finished difference Result 187 states and 195 transitions. [2020-09-24 14:59:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:59:27,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-09-24 14:59:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:27,403 INFO L225 Difference]: With dead ends: 187 [2020-09-24 14:59:27,403 INFO L226 Difference]: Without dead ends: 185 [2020-09-24 14:59:27,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 14:59:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-24 14:59:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2020-09-24 14:59:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-24 14:59:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 174 transitions. [2020-09-24 14:59:27,412 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 174 transitions. Word has length 54 [2020-09-24 14:59:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:27,412 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 174 transitions. [2020-09-24 14:59:27,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:59:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 174 transitions. [2020-09-24 14:59:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 14:59:27,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:27,414 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, 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] [2020-09-24 14:59:27,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:59:27,415 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]=== [2020-09-24 14:59:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 999535374, now seen corresponding path program 1 times [2020-09-24 14:59:27,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:27,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73077167] [2020-09-24 14:59:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:28,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:28,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73077167] [2020-09-24 14:59:28,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:28,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:28,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874614409] [2020-09-24 14:59:28,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:28,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:28,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:28,145 INFO L87 Difference]: Start difference. First operand 167 states and 174 transitions. Second operand 17 states. [2020-09-24 14:59:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:29,382 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2020-09-24 14:59:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:59:29,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-09-24 14:59:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:29,384 INFO L225 Difference]: With dead ends: 224 [2020-09-24 14:59:29,384 INFO L226 Difference]: Without dead ends: 221 [2020-09-24 14:59:29,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:59:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-24 14:59:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2020-09-24 14:59:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-24 14:59:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 185 transitions. [2020-09-24 14:59:29,394 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 185 transitions. Word has length 55 [2020-09-24 14:59:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:29,394 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 185 transitions. [2020-09-24 14:59:29,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 185 transitions. [2020-09-24 14:59:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 14:59:29,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:29,396 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:29,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:59:29,396 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]=== [2020-09-24 14:59:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 754417445, now seen corresponding path program 1 times [2020-09-24 14:59:29,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:29,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865685333] [2020-09-24 14:59:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:30,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865685333] [2020-09-24 14:59:30,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:30,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 14:59:30,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265626339] [2020-09-24 14:59:30,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 14:59:30,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:30,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 14:59:30,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:59:30,372 INFO L87 Difference]: Start difference. First operand 177 states and 185 transitions. Second operand 23 states. [2020-09-24 14:59:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:32,235 INFO L93 Difference]: Finished difference Result 254 states and 264 transitions. [2020-09-24 14:59:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:59:32,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-09-24 14:59:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:32,237 INFO L225 Difference]: With dead ends: 254 [2020-09-24 14:59:32,237 INFO L226 Difference]: Without dead ends: 251 [2020-09-24 14:59:32,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=436, Invalid=1544, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 14:59:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-24 14:59:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 201. [2020-09-24 14:59:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-24 14:59:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 210 transitions. [2020-09-24 14:59:32,247 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 210 transitions. Word has length 65 [2020-09-24 14:59:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:32,247 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 210 transitions. [2020-09-24 14:59:32,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 14:59:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 210 transitions. [2020-09-24 14:59:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 14:59:32,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:32,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:32,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:59:32,249 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]=== [2020-09-24 14:59:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:32,250 INFO L82 PathProgramCache]: Analyzing trace with hash -736103817, now seen corresponding path program 1 times [2020-09-24 14:59:32,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:32,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972562579] [2020-09-24 14:59:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 14:59:32,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972562579] [2020-09-24 14:59:32,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:32,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:59:32,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40836029] [2020-09-24 14:59:32,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:59:32,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:59:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:59:32,605 INFO L87 Difference]: Start difference. First operand 201 states and 210 transitions. Second operand 19 states. [2020-09-24 14:59:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:33,970 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-09-24 14:59:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:33,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2020-09-24 14:59:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:33,972 INFO L225 Difference]: With dead ends: 210 [2020-09-24 14:59:33,972 INFO L226 Difference]: Without dead ends: 208 [2020-09-24 14:59:33,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 14:59:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-24 14:59:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2020-09-24 14:59:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-24 14:59:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 209 transitions. [2020-09-24 14:59:33,982 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 209 transitions. Word has length 70 [2020-09-24 14:59:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:33,983 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 209 transitions. [2020-09-24 14:59:33,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:59:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 209 transitions. [2020-09-24 14:59:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 14:59:33,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:33,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1] [2020-09-24 14:59:33,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:59:33,984 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]=== [2020-09-24 14:59:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash 715756074, now seen corresponding path program 1 times [2020-09-24 14:59:33,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:33,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104898760] [2020-09-24 14:59:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:34,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:34,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104898760] [2020-09-24 14:59:34,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:34,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:59:34,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959743902] [2020-09-24 14:59:34,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:59:34,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:34,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:59:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:59:34,657 INFO L87 Difference]: Start difference. First operand 201 states and 209 transitions. Second operand 25 states. [2020-09-24 14:59:35,409 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-09-24 14:59:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:37,301 INFO L93 Difference]: Finished difference Result 278 states and 289 transitions. [2020-09-24 14:59:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 14:59:37,301 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-09-24 14:59:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:37,303 INFO L225 Difference]: With dead ends: 278 [2020-09-24 14:59:37,303 INFO L226 Difference]: Without dead ends: 256 [2020-09-24 14:59:37,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 14:59:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-24 14:59:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 217. [2020-09-24 14:59:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-09-24 14:59:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 225 transitions. [2020-09-24 14:59:37,313 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 225 transitions. Word has length 71 [2020-09-24 14:59:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:37,313 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 225 transitions. [2020-09-24 14:59:37,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:59:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 225 transitions. [2020-09-24 14:59:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 14:59:37,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:37,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 14:59:37,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:59:37,315 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:37,316 INFO L82 PathProgramCache]: Analyzing trace with hash 181469332, now seen corresponding path program 2 times [2020-09-24 14:59:37,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:37,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264140428] [2020-09-24 14:59:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:37,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264140428] [2020-09-24 14:59:37,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:37,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:59:37,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792759625] [2020-09-24 14:59:37,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:59:37,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:59:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:59:37,772 INFO L87 Difference]: Start difference. First operand 217 states and 225 transitions. Second operand 19 states. [2020-09-24 14:59:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:39,316 INFO L93 Difference]: Finished difference Result 258 states and 267 transitions. [2020-09-24 14:59:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 14:59:39,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-09-24 14:59:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:39,318 INFO L225 Difference]: With dead ends: 258 [2020-09-24 14:59:39,318 INFO L226 Difference]: Without dead ends: 212 [2020-09-24 14:59:39,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:59:39,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-24 14:59:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 201. [2020-09-24 14:59:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-24 14:59:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2020-09-24 14:59:39,334 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 78 [2020-09-24 14:59:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:39,334 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2020-09-24 14:59:39,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:59:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2020-09-24 14:59:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 14:59:39,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:39,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:39,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:59:39,337 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 289772928, now seen corresponding path program 1 times [2020-09-24 14:59:39,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:39,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576143961] [2020-09-24 14:59:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:40,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576143961] [2020-09-24 14:59:40,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:40,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 14:59:40,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902190183] [2020-09-24 14:59:40,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 14:59:40,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 14:59:40,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:59:40,305 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand 27 states. [2020-09-24 14:59:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:43,399 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2020-09-24 14:59:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 14:59:43,400 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 80 [2020-09-24 14:59:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:43,402 INFO L225 Difference]: With dead ends: 228 [2020-09-24 14:59:43,402 INFO L226 Difference]: Without dead ends: 226 [2020-09-24 14:59:43,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2020-09-24 14:59:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-24 14:59:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 201. [2020-09-24 14:59:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-24 14:59:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2020-09-24 14:59:43,411 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 80 [2020-09-24 14:59:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:43,412 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2020-09-24 14:59:43,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 14:59:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2020-09-24 14:59:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 14:59:43,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:43,413 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:43,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:59:43,414 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1069144387, now seen corresponding path program 2 times [2020-09-24 14:59:43,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:43,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086930717] [2020-09-24 14:59:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:44,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086930717] [2020-09-24 14:59:44,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:44,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:59:44,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773385076] [2020-09-24 14:59:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:59:44,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:59:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:59:44,605 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand 24 states. [2020-09-24 14:59:46,073 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-09-24 14:59:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:47,377 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-09-24 14:59:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 14:59:47,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2020-09-24 14:59:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:47,380 INFO L225 Difference]: With dead ends: 281 [2020-09-24 14:59:47,380 INFO L226 Difference]: Without dead ends: 278 [2020-09-24 14:59:47,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 14:59:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-24 14:59:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2020-09-24 14:59:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-24 14:59:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 236 transitions. [2020-09-24 14:59:47,389 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 236 transitions. Word has length 81 [2020-09-24 14:59:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:47,390 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 236 transitions. [2020-09-24 14:59:47,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:59:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 236 transitions. [2020-09-24 14:59:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 14:59:47,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:47,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:47,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:59:47,392 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1841803199, now seen corresponding path program 1 times [2020-09-24 14:59:47,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:47,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927915583] [2020-09-24 14:59:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:48,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927915583] [2020-09-24 14:59:48,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:48,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 14:59:48,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955272784] [2020-09-24 14:59:48,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 14:59:48,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 14:59:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-09-24 14:59:48,943 INFO L87 Difference]: Start difference. First operand 227 states and 236 transitions. Second operand 29 states. [2020-09-24 14:59:50,448 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-09-24 14:59:50,813 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-09-24 14:59:51,082 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-09-24 14:59:51,273 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-24 14:59:51,688 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-09-24 14:59:52,112 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-09-24 14:59:52,418 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-09-24 14:59:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:54,218 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2020-09-24 14:59:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 14:59:54,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-09-24 14:59:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:54,221 INFO L225 Difference]: With dead ends: 299 [2020-09-24 14:59:54,221 INFO L226 Difference]: Without dead ends: 297 [2020-09-24 14:59:54,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=621, Invalid=3669, Unknown=0, NotChecked=0, Total=4290 [2020-09-24 14:59:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-24 14:59:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 251. [2020-09-24 14:59:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-09-24 14:59:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 261 transitions. [2020-09-24 14:59:54,232 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 261 transitions. Word has length 81 [2020-09-24 14:59:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:54,233 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 261 transitions. [2020-09-24 14:59:54,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 14:59:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 261 transitions. [2020-09-24 14:59:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 14:59:54,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:54,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:54,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:59:54,235 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 682951368, now seen corresponding path program 1 times [2020-09-24 14:59:54,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:54,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856501516] [2020-09-24 14:59:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:59:54,293 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:59:54,293 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:59:54,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:59:54,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:59:54 BoogieIcfgContainer [2020-09-24 14:59:54,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:59:54,326 INFO L168 Benchmark]: Toolchain (without parser) took 35230.99 ms. Allocated memory was 140.5 MB in the beginning and 486.5 MB in the end (delta: 346.0 MB). Free memory was 101.9 MB in the beginning and 131.5 MB in the end (delta: -29.6 MB). Peak memory consumption was 316.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:54,326 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-24 14:59:54,327 INFO L168 Benchmark]: CACSL2BoogieTranslator took 674.93 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 171.0 MB in the end (delta: -69.9 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:54,328 INFO L168 Benchmark]: Boogie Preprocessor took 75.18 ms. Allocated memory is still 203.9 MB. Free memory was 171.0 MB in the beginning and 167.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:54,329 INFO L168 Benchmark]: RCFGBuilder took 853.83 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 111.0 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:54,329 INFO L168 Benchmark]: TraceAbstraction took 33618.35 ms. Allocated memory was 203.9 MB in the beginning and 486.5 MB in the end (delta: 282.6 MB). Free memory was 111.0 MB in the beginning and 131.5 MB in the end (delta: -20.4 MB). Peak memory consumption was 262.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:54,332 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 674.93 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 171.0 MB in the end (delta: -69.9 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.18 ms. Allocated memory is still 203.9 MB. Free memory was 171.0 MB in the beginning and 167.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 853.83 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 111.0 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33618.35 ms. Allocated memory was 203.9 MB in the beginning and 486.5 MB in the end (delta: 282.6 MB). Free memory was 111.0 MB in the beginning and 131.5 MB in the end (delta: -20.4 MB). Peak memory consumption was 262.2 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, 123 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.5s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1307 SDtfs, 7506 SDslu, 8195 SDs, 0 SdLazy, 9366 SolverSat, 1274 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 536 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 18.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=251occurred in iteration=17, 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, 17 MinimizatonAttempts, 389 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1004 NumberOfCodeBlocks, 1004 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 902 ConstructedInterpolants, 0 QuantifiedInterpolants, 768247 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 10/110 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...