/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:59:57,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:59:57,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:59:57,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:59:57,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:59:57,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:59:57,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:59:57,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:59:57,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:59:57,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:59:57,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:59:57,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:59:57,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:59:57,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:59:57,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:59:57,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:59:57,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:59:57,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:59:57,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:59:57,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:59:57,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:59:57,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:59:57,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:59:57,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:59:57,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:59:57,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:59:57,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:59:57,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:59:57,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:59:57,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:59:57,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:59:57,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:59:57,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:59:57,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:59:57,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:59:57,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:59:57,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:59:57,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:59:57,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:59:57,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:59:57,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:59:57,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:59:57,955 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:59:57,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:59:57,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:59:57,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:59:57,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:59:57,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:59:57,957 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:59:57,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:59:57,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:59:57,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:59:57,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:59:57,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:59:57,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:59:57,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:59:57,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:59:57,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:59:57,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:59:57,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:59:57,960 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:59:57,960 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:59:58,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:59:58,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:59:58,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:59:58,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:59:58,158 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:59:58,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2022-01-11 05:59:58,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7752fd5/171e38c85dbf4834b354a0211929bdcb/FLAG9cc800997 [2022-01-11 05:59:58,552 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:59:58,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2022-01-11 05:59:58,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7752fd5/171e38c85dbf4834b354a0211929bdcb/FLAG9cc800997 [2022-01-11 05:59:59,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7752fd5/171e38c85dbf4834b354a0211929bdcb [2022-01-11 05:59:59,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:59:59,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:59:59,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:59:59,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:59:59,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:59:59,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d7c613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59, skipping insertion in model container [2022-01-11 05:59:59,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:59:59,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:59:59,186 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c[946,959] [2022-01-11 05:59:59,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:59:59,217 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:59:59,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c[946,959] [2022-01-11 05:59:59,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:59:59,243 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:59:59,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59 WrapperNode [2022-01-11 05:59:59,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:59:59,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:59:59,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:59:59,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:59:59,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,268 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 05:59:59,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:59:59,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:59:59,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:59:59,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:59:59,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:59:59,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:59:59,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:59:59,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:59:59,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:59:59,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:59,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:59:59,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:59:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:59:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:59:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-11 05:59:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-11 05:59:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-11 05:59:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-11 05:59:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:59:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:59:59,439 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:59:59,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:59:59,594 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:59:59,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:59:59,598 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:59:59,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:59 BoogieIcfgContainer [2022-01-11 05:59:59,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:59:59,600 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:59:59,600 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:59:59,616 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:59:59,618 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:59" (1/1) ... [2022-01-11 05:59:59,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:59:59 BasicIcfg [2022-01-11 05:59:59,687 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:59:59,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:59:59,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:59:59,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:59:59,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:59:59" (1/4) ... [2022-01-11 05:59:59,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67947c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:59:59, skipping insertion in model container [2022-01-11 05:59:59,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:59" (2/4) ... [2022-01-11 05:59:59,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67947c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:59:59, skipping insertion in model container [2022-01-11 05:59:59,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:59" (3/4) ... [2022-01-11 05:59:59,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67947c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:59:59, skipping insertion in model container [2022-01-11 05:59:59,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:59:59" (4/4) ... [2022-01-11 05:59:59,694 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.cTransformedIcfg [2022-01-11 05:59:59,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:59:59,698 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:59:59,742 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:59:59,747 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:59:59,747 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:59:59,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-11 05:59:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 05:59:59,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:59,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:59,762 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-11 05:59:59,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:59,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290021288] [2022-01-11 05:59:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:59,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:59:59,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:59,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290021288] [2022-01-11 05:59:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290021288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:59:59,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:59:59,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:59:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397347997] [2022-01-11 05:59:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:59:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:59:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:59:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:59:59,969 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:00,017 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-11 06:00:00,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:00:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-11 06:00:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:00,032 INFO L225 Difference]: With dead ends: 41 [2022-01-11 06:00:00,032 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 06:00:00,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:00:00,036 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:00,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:00:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 06:00:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 06:00:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 06:00:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 06:00:00,067 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-11 06:00:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:00,067 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 06:00:00,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 06:00:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 06:00:00,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:00,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:00,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:00:00,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-11 06:00:00,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:00,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935822288] [2022-01-11 06:00:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:00,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:00:00,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:00,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935822288] [2022-01-11 06:00:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935822288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:00,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:00:00,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:00:00,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327079605] [2022-01-11 06:00:00,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:00,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:00:00,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:00:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:00:00,169 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:00,242 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-11 06:00:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:00:00,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 06:00:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:00,245 INFO L225 Difference]: With dead ends: 31 [2022-01-11 06:00:00,245 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 06:00:00,245 INFO L932 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 [2022-01-11 06:00:00,246 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:00,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 06:00:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-11 06:00:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 06:00:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 06:00:00,253 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-11 06:00:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:00,253 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 06:00:00,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 06:00:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 06:00:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 06:00:00,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:00,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:00,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:00:00,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-11 06:00:00,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:00,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870055301] [2022-01-11 06:00:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:00,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:00:00,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870055301] [2022-01-11 06:00:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870055301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414140531] [2022-01-11 06:00:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:00,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:00,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:00,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 06:00:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:00,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:00,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 06:00:00,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414140531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:00,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 06:00:00,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-11 06:00:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83298042] [2022-01-11 06:00:00,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:00,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 06:00:00,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 06:00:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-11 06:00:00,919 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 06:00:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:00,970 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-01-11 06:00:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 06:00:00,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-11 06:00:00,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:00,973 INFO L225 Difference]: With dead ends: 38 [2022-01-11 06:00:00,973 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 06:00:00,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-11 06:00:00,974 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:00,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:00:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 06:00:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-11 06:00:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 06:00:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-11 06:00:00,985 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-11 06:00:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:00,985 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-11 06:00:00,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 06:00:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-11 06:00:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 06:00:00,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:00,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:01,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 06:00:01,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:01,202 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:01,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1726490069, now seen corresponding path program 1 times [2022-01-11 06:00:01,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:01,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439087873] [2022-01-11 06:00:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:01,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:00:01,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439087873] [2022-01-11 06:00:01,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439087873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:01,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:00:01,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 06:00:01,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311627221] [2022-01-11 06:00:01,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:01,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 06:00:01,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:01,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 06:00:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-11 06:00:01,308 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 06:00:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:01,390 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-11 06:00:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:00:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-11 06:00:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:01,395 INFO L225 Difference]: With dead ends: 41 [2022-01-11 06:00:01,396 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 06:00:01,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-11 06:00:01,401 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:01,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:00:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 06:00:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-11 06:00:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-11 06:00:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2022-01-11 06:00:01,416 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 23 [2022-01-11 06:00:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:01,416 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2022-01-11 06:00:01,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 06:00:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2022-01-11 06:00:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 06:00:01,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:01,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:01,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 06:00:01,418 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash -312577904, now seen corresponding path program 1 times [2022-01-11 06:00:01,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:01,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356952882] [2022-01-11 06:00:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:01,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:01,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356952882] [2022-01-11 06:00:01,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356952882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392073924] [2022-01-11 06:00:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:01,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:01,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:01,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 06:00:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 06:00:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 06:00:02,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 06:00:02,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392073924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:00:02,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 06:00:02,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-01-11 06:00:02,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200864949] [2022-01-11 06:00:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:00:02,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 06:00:02,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 06:00:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-11 06:00:02,522 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 06:00:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:02,563 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2022-01-11 06:00:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 06:00:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-01-11 06:00:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:02,564 INFO L225 Difference]: With dead ends: 50 [2022-01-11 06:00:02,564 INFO L226 Difference]: Without dead ends: 46 [2022-01-11 06:00:02,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-11 06:00:02,565 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:02,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 192 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:00:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-11 06:00:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-11 06:00:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-11 06:00:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2022-01-11 06:00:02,571 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 34 [2022-01-11 06:00:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:02,572 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2022-01-11 06:00:02,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 06:00:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2022-01-11 06:00:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 06:00:02,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:02,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:02,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:02,804 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash 176289166, now seen corresponding path program 1 times [2022-01-11 06:00:02,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216654542] [2022-01-11 06:00:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:02,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:02,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:03,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:03,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:03,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216654542] [2022-01-11 06:00:03,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216654542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921651979] [2022-01-11 06:00:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:03,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:03,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:03,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:03,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 06:00:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 06:00:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-11 06:00:03,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 06:00:27,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921651979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:27,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:27,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 34 [2022-01-11 06:00:27,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109934694] [2022-01-11 06:00:27,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:27,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-11 06:00:27,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:27,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-11 06:00:27,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1020, Unknown=11, NotChecked=0, Total=1122 [2022-01-11 06:00:27,981 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 34 states, 27 states have (on average 1.962962962962963) internal successors, (53), 23 states have internal predecessors, (53), 10 states have call successors, (12), 1 states have call predecessors, (12), 14 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-11 06:00:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:28,863 INFO L93 Difference]: Finished difference Result 94 states and 173 transitions. [2022-01-11 06:00:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-11 06:00:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.962962962962963) internal successors, (53), 23 states have internal predecessors, (53), 10 states have call successors, (12), 1 states have call predecessors, (12), 14 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) Word has length 35 [2022-01-11 06:00:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:28,864 INFO L225 Difference]: With dead ends: 94 [2022-01-11 06:00:28,865 INFO L226 Difference]: Without dead ends: 60 [2022-01-11 06:00:28,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=243, Invalid=2296, Unknown=11, NotChecked=0, Total=2550 [2022-01-11 06:00:28,867 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:28,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 422 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 691 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-01-11 06:00:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-11 06:00:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-01-11 06:00:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 9 states have return successors, (34), 14 states have call predecessors, (34), 9 states have call successors, (34) [2022-01-11 06:00:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 74 transitions. [2022-01-11 06:00:28,874 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 74 transitions. Word has length 35 [2022-01-11 06:00:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:28,874 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 74 transitions. [2022-01-11 06:00:28,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.962962962962963) internal successors, (53), 23 states have internal predecessors, (53), 10 states have call successors, (12), 1 states have call predecessors, (12), 14 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-11 06:00:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 74 transitions. [2022-01-11 06:00:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 06:00:28,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:28,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:28,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:29,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:29,093 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 2 times [2022-01-11 06:00:29,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:29,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650078099] [2022-01-11 06:00:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:29,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:29,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:29,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:29,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:29,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:00:29,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650078099] [2022-01-11 06:00:29,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650078099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249481593] [2022-01-11 06:00:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:00:29,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:29,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:29,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:29,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 06:00:29,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:00:29,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:00:29,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:00:30,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249481593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:30,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:30,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-11 06:00:30,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52105969] [2022-01-11 06:00:30,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:30,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 06:00:30,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 06:00:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-11 06:00:30,046 INFO L87 Difference]: Start difference. First operand 46 states and 74 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 06:00:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:30,442 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2022-01-11 06:00:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 06:00:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-11 06:00:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:30,445 INFO L225 Difference]: With dead ends: 133 [2022-01-11 06:00:30,445 INFO L226 Difference]: Without dead ends: 71 [2022-01-11 06:00:30,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:00:30,447 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:30,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 254 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:00:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-11 06:00:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2022-01-11 06:00:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.135135135135135) internal successors, (42), 40 states have internal predecessors, (42), 11 states have call successors, (11), 4 states have call predecessors, (11), 13 states have return successors, (44), 17 states have call predecessors, (44), 11 states have call successors, (44) [2022-01-11 06:00:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 97 transitions. [2022-01-11 06:00:30,455 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 97 transitions. Word has length 35 [2022-01-11 06:00:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:30,475 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 97 transitions. [2022-01-11 06:00:30,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 06:00:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 97 transitions. [2022-01-11 06:00:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 06:00:30,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:30,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:30,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 06:00:30,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:30,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash 94684969, now seen corresponding path program 1 times [2022-01-11 06:00:30,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645921131] [2022-01-11 06:00:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:30,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:00:30,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:30,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645921131] [2022-01-11 06:00:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645921131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:30,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672190765] [2022-01-11 06:00:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:30,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:30,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:30,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 06:00:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:00:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:00:31,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 06:00:31,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672190765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:31,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:31,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-11 06:00:31,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705019823] [2022-01-11 06:00:31,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:31,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 06:00:31,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 06:00:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-11 06:00:31,790 INFO L87 Difference]: Start difference. First operand 62 states and 97 transitions. Second operand has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:32,137 INFO L93 Difference]: Finished difference Result 148 states and 281 transitions. [2022-01-11 06:00:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:00:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 47 [2022-01-11 06:00:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:32,142 INFO L225 Difference]: With dead ends: 148 [2022-01-11 06:00:32,142 INFO L226 Difference]: Without dead ends: 89 [2022-01-11 06:00:32,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-11 06:00:32,144 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:32,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 254 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:00:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-11 06:00:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-01-11 06:00:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 14 states have call successors, (14), 5 states have call predecessors, (14), 17 states have return successors, (67), 23 states have call predecessors, (67), 14 states have call successors, (67) [2022-01-11 06:00:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2022-01-11 06:00:32,178 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 47 [2022-01-11 06:00:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:32,178 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2022-01-11 06:00:32,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 06:00:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2022-01-11 06:00:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 06:00:32,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:32,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:32,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:32,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:32,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1359840148, now seen corresponding path program 1 times [2022-01-11 06:00:32,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:32,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860853206] [2022-01-11 06:00:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:32,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 06:00:32,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:32,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860853206] [2022-01-11 06:00:32,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860853206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501601646] [2022-01-11 06:00:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:32,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:32,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:32,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:32,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 06:00:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:00:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-11 06:00:33,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 06:00:33,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501601646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:33,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:33,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 28 [2022-01-11 06:00:33,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067740221] [2022-01-11 06:00:33,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:33,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 06:00:33,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:33,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 06:00:33,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-01-11 06:00:33,715 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand has 28 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 17 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (20), 12 states have call predecessors, (20), 17 states have call successors, (20) [2022-01-11 06:00:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:34,735 INFO L93 Difference]: Finished difference Result 208 states and 423 transitions. [2022-01-11 06:00:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-11 06:00:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 17 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (20), 12 states have call predecessors, (20), 17 states have call successors, (20) Word has length 47 [2022-01-11 06:00:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:34,739 INFO L225 Difference]: With dead ends: 208 [2022-01-11 06:00:34,739 INFO L226 Difference]: Without dead ends: 127 [2022-01-11 06:00:34,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-01-11 06:00:34,741 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:34,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 402 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-11 06:00:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-11 06:00:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2022-01-11 06:00:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 19 states have call successors, (19), 8 states have call predecessors, (19), 22 states have return successors, (82), 30 states have call predecessors, (82), 19 states have call successors, (82) [2022-01-11 06:00:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 174 transitions. [2022-01-11 06:00:34,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 174 transitions. Word has length 47 [2022-01-11 06:00:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:34,782 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 174 transitions. [2022-01-11 06:00:34,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 17 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (20), 12 states have call predecessors, (20), 17 states have call successors, (20) [2022-01-11 06:00:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 174 transitions. [2022-01-11 06:00:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-11 06:00:34,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:34,784 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:34,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:35,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:35,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1733964340, now seen corresponding path program 3 times [2022-01-11 06:00:35,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:35,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841737299] [2022-01-11 06:00:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:35,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 06:00:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:00:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-11 06:00:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-11 06:00:35,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841737299] [2022-01-11 06:00:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841737299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407532608] [2022-01-11 06:00:35,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:00:35,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:35,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:35,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:35,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 06:00:36,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-11 06:00:36,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:00:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:00:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-01-11 06:00:36,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:00:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-01-11 06:00:37,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407532608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:00:37,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:00:37,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2022-01-11 06:00:37,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030735803] [2022-01-11 06:00:37,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:00:37,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 06:00:37,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:00:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 06:00:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-11 06:00:37,271 INFO L87 Difference]: Start difference. First operand 106 states and 174 transitions. Second operand has 19 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 18 states have internal predecessors, (45), 9 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 7 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-11 06:00:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:00:37,707 INFO L93 Difference]: Finished difference Result 213 states and 363 transitions. [2022-01-11 06:00:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-11 06:00:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 18 states have internal predecessors, (45), 9 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 7 states have call predecessors, (17), 9 states have call successors, (17) Word has length 71 [2022-01-11 06:00:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:00:37,709 INFO L225 Difference]: With dead ends: 213 [2022-01-11 06:00:37,709 INFO L226 Difference]: Without dead ends: 110 [2022-01-11 06:00:37,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:00:37,711 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:00:37,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:00:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-11 06:00:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-01-11 06:00:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 17 states have call successors, (17), 9 states have call predecessors, (17), 19 states have return successors, (50), 25 states have call predecessors, (50), 17 states have call successors, (50) [2022-01-11 06:00:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2022-01-11 06:00:37,736 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 71 [2022-01-11 06:00:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:00:37,736 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2022-01-11 06:00:37,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 18 states have internal predecessors, (45), 9 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 7 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-11 06:00:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2022-01-11 06:00:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-11 06:00:37,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:00:37,738 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 8, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:00:37,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 06:00:37,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:37,962 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:00:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:00:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1629631757, now seen corresponding path program 1 times [2022-01-11 06:00:37,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:00:37,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858254925] [2022-01-11 06:00:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:37,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:00:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:00:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:38,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-11 06:00:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 06:00:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 06:00:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 06:00:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 06:00:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 52 proven. 110 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-01-11 06:00:39,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:00:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858254925] [2022-01-11 06:00:39,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858254925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:00:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816989791] [2022-01-11 06:00:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:00:39,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:00:39,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:00:39,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:00:39,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 06:00:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:00:39,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-11 06:00:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:00:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2022-01-11 06:00:40,661 INFO L328 TraceCheckSpWp]: Computing backward predicates...