/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:26:37,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:26:37,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:26:37,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:26:37,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:26:37,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:26:37,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:26:37,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:26:37,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:26:37,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:26:37,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:26:37,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:26:37,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:26:37,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:26:37,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:26:37,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:26:37,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:26:37,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:26:37,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:26:37,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:26:37,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:26:37,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:26:37,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:26:37,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:26:37,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:26:37,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:26:37,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:26:37,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:26:37,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:26:37,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:26:37,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:26:37,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:26:37,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:26:37,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:26:37,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:26:37,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:26:37,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:26:37,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:26:37,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:26:37,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:26:37,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:26:37,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:26:37,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:26:37,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:26:37,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:26:37,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:26:37,610 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:26:37,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:26:37,611 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:26:37,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:26:37,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:26:37,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:26:37,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:26:37,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:26:37,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:26:37,612 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:26:37,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:26:37,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:26:37,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:26:37,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:26:37,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:26:37,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:26:37,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:26:37,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:26:37,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:26:37,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:26:37,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:26:37,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:26:37,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:26:37,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:26:37,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:26:37,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:26:38,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:26:38,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:26:38,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:26:38,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:26:38,054 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:26:38,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-22 01:26:38,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1accfdaf/555e3a4a512a4d709fc26f5748aec345/FLAG3a8bd5511 [2020-08-22 01:26:38,673 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:26:38,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-22 01:26:38,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1accfdaf/555e3a4a512a4d709fc26f5748aec345/FLAG3a8bd5511 [2020-08-22 01:26:39,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1accfdaf/555e3a4a512a4d709fc26f5748aec345 [2020-08-22 01:26:39,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:26:39,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:26:39,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:26:39,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:26:39,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:26:39,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3caca8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39, skipping insertion in model container [2020-08-22 01:26:39,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:26:39,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:26:39,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:26:39,749 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:26:39,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:26:39,867 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:26:39,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39 WrapperNode [2020-08-22 01:26:39,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:26:39,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:26:39,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:26:39,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:26:39,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... [2020-08-22 01:26:39,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:26:39,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:26:39,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:26:39,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:26:39,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:26:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:26:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:26:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:26:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 01:26:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 01:26:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 01:26:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 01:26:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 01:26:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 01:26:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 01:26:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 01:26:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 01:26:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 01:26:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 01:26:40,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 01:26:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 01:26:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 01:26:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 01:26:40,042 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 01:26:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 01:26:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 01:26:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 01:26:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 01:26:40,043 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 01:26:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 01:26:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 01:26:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 01:26:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 01:26:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 01:26:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 01:26:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 01:26:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 01:26:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 01:26:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 01:26:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 01:26:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 01:26:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 01:26:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 01:26:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 01:26:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 01:26:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 01:26:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 01:26:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 01:26:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 01:26:40,051 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:26:40,051 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 01:26:40,051 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 01:26:40,051 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 01:26:40,051 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 01:26:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 01:26:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 01:26:40,053 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 01:26:40,053 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 01:26:40,054 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 01:26:40,054 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 01:26:40,054 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 01:26:40,055 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 01:26:40,055 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 01:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 01:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 01:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 01:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 01:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 01:26:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 01:26:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 01:26:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 01:26:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 01:26:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 01:26:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 01:26:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 01:26:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:26:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:26:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:26:40,809 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:26:40,810 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-22 01:26:40,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:26:40 BoogieIcfgContainer [2020-08-22 01:26:40,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:26:40,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:26:40,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:26:40,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:26:40,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:26:39" (1/3) ... [2020-08-22 01:26:40,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a0c546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:26:40, skipping insertion in model container [2020-08-22 01:26:40,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:26:39" (2/3) ... [2020-08-22 01:26:40,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a0c546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:26:40, skipping insertion in model container [2020-08-22 01:26:40,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:26:40" (3/3) ... [2020-08-22 01:26:40,825 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-22 01:26:40,837 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:26:40,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-22 01:26:40,862 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-22 01:26:40,891 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:26:40,891 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:26:40,891 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:26:40,891 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:26:40,891 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:26:40,892 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:26:40,892 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:26:40,892 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:26:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-22 01:26:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-22 01:26:40,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:40,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:40,927 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-22 01:26:40,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:40,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966234398] [2020-08-22 01:26:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:41,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:41,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966234398] [2020-08-22 01:26:41,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:41,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:26:41,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240227856] [2020-08-22 01:26:41,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:26:41,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:26:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:41,200 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-22 01:26:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:41,594 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-22 01:26:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:26:41,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-22 01:26:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:41,611 INFO L225 Difference]: With dead ends: 186 [2020-08-22 01:26:41,612 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 01:26:41,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 01:26:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-22 01:26:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:26:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-22 01:26:41,679 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-22 01:26:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:41,680 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-22 01:26:41,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:26:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-22 01:26:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:26:41,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:41,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:41,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:26:41,682 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-22 01:26:41,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:41,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150019347] [2020-08-22 01:26:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:41,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150019347] [2020-08-22 01:26:41,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:41,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:26:41,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239152111] [2020-08-22 01:26:41,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:26:41,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:41,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:26:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:41,746 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-22 01:26:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:41,904 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-22 01:26:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:26:41,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 01:26:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:41,906 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:26:41,906 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 01:26:41,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 01:26:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-22 01:26:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 01:26:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-22 01:26:41,918 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-22 01:26:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:41,918 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-22 01:26:41,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:26:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-22 01:26:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:26:41,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:41,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:41,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:26:41,920 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-22 01:26:41,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:41,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282214937] [2020-08-22 01:26:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:41,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282214937] [2020-08-22 01:26:41,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:41,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:26:41,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18708550] [2020-08-22 01:26:41,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:26:41,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:26:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:41,996 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-22 01:26:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:42,215 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-22 01:26:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:26:42,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 01:26:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:42,217 INFO L225 Difference]: With dead ends: 138 [2020-08-22 01:26:42,217 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 01:26:42,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:26:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 01:26:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-22 01:26:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 01:26:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-22 01:26:42,227 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-22 01:26:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:42,228 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-22 01:26:42,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:26:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-22 01:26:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:26:42,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:42,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:42,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:26:42,229 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-22 01:26:42,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:42,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774690694] [2020-08-22 01:26:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:42,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:42,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774690694] [2020-08-22 01:26:42,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:42,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:26:42,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119527618] [2020-08-22 01:26:42,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:26:42,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:26:42,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:42,299 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-22 01:26:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:42,472 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-22 01:26:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:26:42,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 01:26:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:42,474 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:26:42,474 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 01:26:42,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 01:26:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-22 01:26:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:26:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-22 01:26:42,482 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-22 01:26:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:42,483 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-22 01:26:42,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:26:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-22 01:26:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:26:42,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:42,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:42,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:26:42,485 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-22 01:26:42,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:42,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021525306] [2020-08-22 01:26:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:42,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021525306] [2020-08-22 01:26:42,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:42,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:26:42,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215451590] [2020-08-22 01:26:42,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:26:42,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:26:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:42,580 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-22 01:26:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:42,797 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-22 01:26:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:26:42,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-22 01:26:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:42,800 INFO L225 Difference]: With dead ends: 199 [2020-08-22 01:26:42,800 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 01:26:42,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:26:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 01:26:42,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-22 01:26:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:26:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-22 01:26:42,814 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-22 01:26:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:42,814 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-22 01:26:42,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:26:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-22 01:26:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:26:42,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:42,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:42,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:26:42,816 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-22 01:26:42,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:42,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829597200] [2020-08-22 01:26:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:42,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:42,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829597200] [2020-08-22 01:26:42,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:42,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:26:42,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192873124] [2020-08-22 01:26:42,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:26:42,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:26:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:26:42,912 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-22 01:26:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:43,148 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-22 01:26:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:26:43,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 01:26:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:43,150 INFO L225 Difference]: With dead ends: 126 [2020-08-22 01:26:43,150 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 01:26:43,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:26:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 01:26:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-22 01:26:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 01:26:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-22 01:26:43,157 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-22 01:26:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:43,158 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-22 01:26:43,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:26:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-22 01:26:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:26:43,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:43,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:43,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:26:43,160 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-22 01:26:43,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:43,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911193191] [2020-08-22 01:26:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:43,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911193191] [2020-08-22 01:26:43,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:43,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:26:43,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561294903] [2020-08-22 01:26:43,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:26:43,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:26:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:26:43,221 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-22 01:26:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:43,396 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-22 01:26:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:26:43,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 01:26:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:43,398 INFO L225 Difference]: With dead ends: 136 [2020-08-22 01:26:43,398 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 01:26:43,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:26:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 01:26:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-22 01:26:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 01:26:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-22 01:26:43,405 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-22 01:26:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:43,405 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-22 01:26:43,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:26:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-22 01:26:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:26:43,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:43,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:43,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:26:43,407 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-22 01:26:43,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:43,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744807800] [2020-08-22 01:26:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:43,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744807800] [2020-08-22 01:26:43,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:43,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:26:43,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147459577] [2020-08-22 01:26:43,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:26:43,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:26:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:43,459 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-22 01:26:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:43,598 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-22 01:26:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:26:43,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 01:26:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:43,600 INFO L225 Difference]: With dead ends: 141 [2020-08-22 01:26:43,600 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 01:26:43,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 01:26:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-22 01:26:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:26:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-22 01:26:43,610 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-22 01:26:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:43,610 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-22 01:26:43,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:26:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-22 01:26:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:26:43,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:43,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:43,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:26:43,612 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:43,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-22 01:26:43,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:43,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009427771] [2020-08-22 01:26:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:43,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009427771] [2020-08-22 01:26:43,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:43,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:26:43,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447366434] [2020-08-22 01:26:43,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:26:43,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:43,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:26:43,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:43,718 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-22 01:26:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:43,830 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-22 01:26:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:26:43,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 01:26:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:43,832 INFO L225 Difference]: With dead ends: 79 [2020-08-22 01:26:43,832 INFO L226 Difference]: Without dead ends: 77 [2020-08-22 01:26:43,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-22 01:26:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-22 01:26:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 01:26:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-22 01:26:43,838 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-22 01:26:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:43,838 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-22 01:26:43,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:26:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-22 01:26:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 01:26:43,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:43,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:43,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:26:43,840 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-22 01:26:43,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:43,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504940066] [2020-08-22 01:26:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:43,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504940066] [2020-08-22 01:26:43,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:43,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:26:43,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734178545] [2020-08-22 01:26:43,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:26:43,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:26:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:43,894 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-22 01:26:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:44,049 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-22 01:26:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:26:44,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 01:26:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:44,051 INFO L225 Difference]: With dead ends: 78 [2020-08-22 01:26:44,052 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 01:26:44,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 01:26:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 01:26:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:26:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-22 01:26:44,058 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-22 01:26:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:44,058 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-22 01:26:44,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:26:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-22 01:26:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:26:44,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:44,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:44,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:26:44,060 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:44,060 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-22 01:26:44,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:44,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804861030] [2020-08-22 01:26:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:44,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:44,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804861030] [2020-08-22 01:26:44,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:44,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:26:44,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387844559] [2020-08-22 01:26:44,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:26:44,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:26:44,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:26:44,149 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-22 01:26:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:44,452 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-22 01:26:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:26:44,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 01:26:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:44,455 INFO L225 Difference]: With dead ends: 179 [2020-08-22 01:26:44,455 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 01:26:44,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:26:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 01:26:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-22 01:26:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 01:26:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-22 01:26:44,467 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-22 01:26:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:44,468 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-22 01:26:44,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:26:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-22 01:26:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:26:44,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:44,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:44,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:26:44,470 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-22 01:26:44,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:44,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988446676] [2020-08-22 01:26:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:44,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:26:44,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988446676] [2020-08-22 01:26:44,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:44,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 01:26:44,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860162149] [2020-08-22 01:26:44,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:26:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:26:44,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:26:44,813 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-22 01:26:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:45,609 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-22 01:26:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:26:45,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-22 01:26:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:45,614 INFO L225 Difference]: With dead ends: 182 [2020-08-22 01:26:45,614 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 01:26:45,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:26:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 01:26:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-22 01:26:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 01:26:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-22 01:26:45,623 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-22 01:26:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:45,624 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-22 01:26:45,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:26:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-22 01:26:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:26:45,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:45,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:45,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:26:45,626 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-22 01:26:45,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:45,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938825926] [2020-08-22 01:26:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:45,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:26:45,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938825926] [2020-08-22 01:26:45,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:45,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:26:45,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10836569] [2020-08-22 01:26:45,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:26:45,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:26:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:26:45,692 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-22 01:26:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:45,901 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-22 01:26:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:26:45,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 01:26:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:45,903 INFO L225 Difference]: With dead ends: 150 [2020-08-22 01:26:45,903 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 01:26:45,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:26:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 01:26:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-22 01:26:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 01:26:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-22 01:26:45,912 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-22 01:26:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:45,913 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-22 01:26:45,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:26:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-22 01:26:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:26:45,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:45,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:45,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:26:45,915 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-22 01:26:45,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:45,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573707637] [2020-08-22 01:26:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:45,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:26:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:26:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:26:45,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573707637] [2020-08-22 01:26:45,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:26:45,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:26:45,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481446991] [2020-08-22 01:26:45,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:26:45,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:26:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:26:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:45,956 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-22 01:26:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:26:46,111 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-22 01:26:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:26:46,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-22 01:26:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:26:46,112 INFO L225 Difference]: With dead ends: 124 [2020-08-22 01:26:46,112 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 01:26:46,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:26:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 01:26:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-22 01:26:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 01:26:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-22 01:26:46,128 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-22 01:26:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:26:46,128 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-22 01:26:46,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:26:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-22 01:26:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:26:46,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:26:46,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:26:46,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:26:46,134 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:26:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:26:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-22 01:26:46,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:26:46,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949439273] [2020-08-22 01:26:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:26:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:26:46,166 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:26:46,167 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:26:46,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:26:46,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:26:46 BoogieIcfgContainer [2020-08-22 01:26:46,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:26:46,214 INFO L168 Benchmark]: Toolchain (without parser) took 7063.52 ms. Allocated memory was 138.4 MB in the beginning and 300.4 MB in the end (delta: 162.0 MB). Free memory was 100.3 MB in the beginning and 255.4 MB in the end (delta: -155.1 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:26:46,215 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:26:46,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 717.46 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.1 MB in the beginning and 166.7 MB in the end (delta: -66.5 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-22 01:26:46,216 INFO L168 Benchmark]: Boogie Preprocessor took 92.03 ms. Allocated memory is still 200.8 MB. Free memory was 166.7 MB in the beginning and 163.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-22 01:26:46,217 INFO L168 Benchmark]: RCFGBuilder took 853.45 ms. Allocated memory is still 200.8 MB. Free memory was 163.1 MB in the beginning and 107.6 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-08-22 01:26:46,218 INFO L168 Benchmark]: TraceAbstraction took 5394.30 ms. Allocated memory was 200.8 MB in the beginning and 300.4 MB in the end (delta: 99.6 MB). Free memory was 106.9 MB in the beginning and 255.4 MB in the end (delta: -148.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:26:46,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 717.46 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.1 MB in the beginning and 166.7 MB in the end (delta: -66.5 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.03 ms. Allocated memory is still 200.8 MB. Free memory was 166.7 MB in the beginning and 163.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 853.45 ms. Allocated memory is still 200.8 MB. Free memory was 163.1 MB in the beginning and 107.6 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5394.30 ms. Allocated memory was 200.8 MB in the beginning and 300.4 MB in the end (delta: 99.6 MB). Free memory was 106.9 MB in the beginning and 255.4 MB in the end (delta: -148.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.2s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...