/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_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:22:58,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:22:58,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:22:58,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:22:58,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:22:58,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:22:58,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:22:58,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:22:58,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:22:58,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:22:58,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:22:58,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:22:58,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:22:58,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:22:58,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:22:58,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:22:58,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:22:58,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:22:58,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:22:58,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:22:58,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:22:58,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:22:58,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:22:58,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:22:58,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:22:58,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:22:58,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:22:58,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:22:58,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:22:58,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:22:58,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:22:58,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:22:58,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:22:58,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:22:58,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:22:58,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:22:58,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:22:58,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:22:58,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:22:58,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:22:58,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:22:58,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:22:58,394 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:22:58,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:22:58,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:22:58,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:22:58,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:22:58,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:22:58,396 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:22:58,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:22:58,397 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:22:58,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:22:58,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:22:58,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:22:58,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:22:58,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:22:58,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:58,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:22:58,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:22:58,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:22:58,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:22:58,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:22:58,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:22:58,400 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:22:58,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:22:58,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:22:58,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:22:58,402 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:22:58,402 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:22:58,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:22:58,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:22:58,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:22:58,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:22:58,656 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:22:58,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2022-01-10 18:22:58,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc69c4977/7dc2de53040344518b35e38e85733d8c/FLAG5a8eda45b [2022-01-10 18:22:59,085 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:22:59,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2022-01-10 18:22:59,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc69c4977/7dc2de53040344518b35e38e85733d8c/FLAG5a8eda45b [2022-01-10 18:22:59,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc69c4977/7dc2de53040344518b35e38e85733d8c [2022-01-10 18:22:59,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:22:59,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:22:59,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:59,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:22:59,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:22:59,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@354d2cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59, skipping insertion in model container [2022-01-10 18:22:59,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:22:59,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:22:59,275 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_8-1.c[947,960] [2022-01-10 18:22:59,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:59,307 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:22:59,330 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_8-1.c[947,960] [2022-01-10 18:22:59,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:59,343 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:22:59,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59 WrapperNode [2022-01-10 18:22:59,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:59,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:59,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:22:59,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:22:59,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,371 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:22:59,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:59,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:22:59,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:22:59,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:22:59,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:22:59,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:22:59,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:22:59,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:22:59,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:59,420 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) [2022-01-10 18:22:59,439 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 [2022-01-10 18:22:59,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:22:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:22:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 18:22:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 18:22:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 18:22:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 18:22:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:22:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:22:59,514 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:22:59,515 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:22:59,605 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:22:59,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:22:59,610 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:22:59,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:59 BoogieIcfgContainer [2022-01-10 18:22:59,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:22:59,613 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:22:59,613 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:22:59,614 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:22:59,616 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:22:59 BasicIcfg [2022-01-10 18:22:59,705 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:22:59,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:22:59,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:22:59,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:22:59,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:22:59" (1/4) ... [2022-01-10 18:22:59,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e73a522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:22:59, skipping insertion in model container [2022-01-10 18:22:59,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (2/4) ... [2022-01-10 18:22:59,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e73a522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:22:59, skipping insertion in model container [2022-01-10 18:22:59,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:59" (3/4) ... [2022-01-10 18:22:59,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e73a522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:22:59, skipping insertion in model container [2022-01-10 18:22:59,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:22:59" (4/4) ... [2022-01-10 18:22:59,720 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.cTransformedIcfg [2022-01-10 18:22:59,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:22:59,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:22:59,761 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:22:59,767 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 [2022-01-10 18:22:59,767 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:22:59,780 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) [2022-01-10 18:22:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:22:59,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:59,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:59,784 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-10 18:22:59,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:59,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532381420] [2022-01-10 18:22:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:59,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:00,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:00,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532381420] [2022-01-10 18:23:00,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532381420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:00,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:00,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:00,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008818291] [2022-01-10 18:23:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:00,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:00,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:00,147 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, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-01-10 18:23:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:00,245 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 18:23:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-01-10 18:23:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:00,254 INFO L225 Difference]: With dead ends: 37 [2022-01-10 18:23:00,254 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 18:23:00,257 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 [2022-01-10 18:23:00,260 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:00,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 18:23:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 18:23:00,293 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) [2022-01-10 18:23:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:23:00,295 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 18:23:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:00,295 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:23:00,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-01-10 18:23:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:23:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:23:00,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:00,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:00,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:23:00,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-10 18:23:00,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:00,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748083339] [2022-01-10 18:23:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:00,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:00,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748083339] [2022-01-10 18:23:00,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748083339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:00,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:00,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:00,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583140782] [2022-01-10 18:23:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:00,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:00,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:00,356 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) [2022-01-10 18:23:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:00,401 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 18:23:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:00,402 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 [2022-01-10 18:23:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:00,403 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:23:00,403 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:23:00,404 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 [2022-01-10 18:23:00,405 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:00,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:23:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 18:23:00,412 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) [2022-01-10 18:23:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:23:00,413 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 18:23:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:00,413 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:23:00,414 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) [2022-01-10 18:23:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:23:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:23:00,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:00,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:00,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:23:00,415 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-10 18:23:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20395131] [2022-01-10 18:23:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:00,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:00,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:00,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20395131] [2022-01-10 18:23:00,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20395131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:00,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161503740] [2022-01-10 18:23:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:00,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:00,625 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) [2022-01-10 18:23:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:23:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:23:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:00,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:23:00,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161503740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:00,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:23:00,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2022-01-10 18:23:00,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096667861] [2022-01-10 18:23:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:00,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:23:00,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:23:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:23:00,960 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-01-10 18:23:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:01,090 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-01-10 18:23:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:23:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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 22 [2022-01-10 18:23:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:01,093 INFO L225 Difference]: With dead ends: 36 [2022-01-10 18:23:01,094 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 18:23:01,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-10 18:23:01,097 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:01,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 18:23:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-01-10 18:23:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 18:23:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-01-10 18:23:01,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 22 [2022-01-10 18:23:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:01,114 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-01-10 18:23:01,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-01-10 18:23:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-01-10 18:23:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 18:23:01,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:01,117 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] [2022-01-10 18:23:01,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:01,339 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 [2022-01-10 18:23:01,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1726490069, now seen corresponding path program 1 times [2022-01-10 18:23:01,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789533252] [2022-01-10 18:23:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:01,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:01,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789533252] [2022-01-10 18:23:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789533252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:01,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:01,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:23:01,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916934563] [2022-01-10 18:23:01,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:01,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:23:01,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:23:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:23:01,488 INFO L87 Difference]: Start difference. First operand 28 states and 36 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) [2022-01-10 18:23:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:01,585 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-01-10 18:23:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:23:01,591 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 [2022-01-10 18:23:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:01,593 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:23:01,593 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 18:23:01,594 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 [2022-01-10 18:23:01,597 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-01-10 18:23:01,597 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] [2022-01-10 18:23:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 18:23:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-01-10 18:23:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-01-10 18:23:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2022-01-10 18:23:01,606 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 23 [2022-01-10 18:23:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:01,606 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2022-01-10 18:23:01,606 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) [2022-01-10 18:23:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2022-01-10 18:23:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:23:01,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:01,609 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] [2022-01-10 18:23:01,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:23:01,610 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash -312577904, now seen corresponding path program 1 times [2022-01-10 18:23:01,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:01,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201633386] [2022-01-10 18:23:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:01,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:02,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201633386] [2022-01-10 18:23:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201633386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753721461] [2022-01-10 18:23:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:02,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:02,044 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) [2022-01-10 18:23:02,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:23:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 18:23:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 18:23:02,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 18:23:02,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753721461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:02,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:02,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 20 [2022-01-10 18:23:02,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568456320] [2022-01-10 18:23:02,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:02,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 18:23:02,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 18:23:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:23:02,828 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 18:23:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:03,342 INFO L93 Difference]: Finished difference Result 71 states and 111 transitions. [2022-01-10 18:23:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:23:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) Word has length 34 [2022-01-10 18:23:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:03,343 INFO L225 Difference]: With dead ends: 71 [2022-01-10 18:23:03,343 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 18:23:03,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-10 18:23:03,345 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:03,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:23:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 18:23:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-01-10 18:23:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-01-10 18:23:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2022-01-10 18:23:03,352 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 34 [2022-01-10 18:23:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:03,352 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2022-01-10 18:23:03,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 18:23:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2022-01-10 18:23:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 18:23:03,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:03,355 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:03,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:03,555 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 [2022-01-10 18:23:03,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1907496380, now seen corresponding path program 1 times [2022-01-10 18:23:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897132515] [2022-01-10 18:23:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:03,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 18:23:03,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897132515] [2022-01-10 18:23:03,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897132515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651299627] [2022-01-10 18:23:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:03,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:03,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:03,796 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) [2022-01-10 18:23:03,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:23:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 18:23:04,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:23:04,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651299627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:04,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:04,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-10 18:23:04,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594637463] [2022-01-10 18:23:04,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:04,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 18:23:04,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:04,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 18:23:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-10 18:23:04,555 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 19 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 18:23:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:04,976 INFO L93 Difference]: Finished difference Result 105 states and 181 transitions. [2022-01-10 18:23:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:23:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) Word has length 48 [2022-01-10 18:23:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:04,978 INFO L225 Difference]: With dead ends: 105 [2022-01-10 18:23:04,978 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 18:23:04,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:23:04,980 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:04,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 183 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:23:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 18:23:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2022-01-10 18:23:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (24), 11 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-10 18:23:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2022-01-10 18:23:04,995 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 48 [2022-01-10 18:23:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:04,997 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2022-01-10 18:23:04,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 18:23:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2022-01-10 18:23:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 18:23:05,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:05,003 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:05,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 18:23:05,203 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 [2022-01-10 18:23:05,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:05,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1166758002, now seen corresponding path program 2 times [2022-01-10 18:23:05,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:05,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963209540] [2022-01-10 18:23:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:05,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:23:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:23:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:23:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 18:23:05,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963209540] [2022-01-10 18:23:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963209540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109677006] [2022-01-10 18:23:05,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:23:05,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:05,728 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) [2022-01-10 18:23:05,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:23:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:23:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 18:23:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 18:23:06,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 18:23:08,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109677006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:08,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:08,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-01-10 18:23:08,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326509653] [2022-01-10 18:23:08,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:08,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 18:23:08,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 18:23:08,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-10 18:23:08,963 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 26 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-10 18:23:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:11,349 INFO L93 Difference]: Finished difference Result 111 states and 179 transitions. [2022-01-10 18:23:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 18:23:11,350 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) Word has length 70 [2022-01-10 18:23:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:11,352 INFO L225 Difference]: With dead ends: 111 [2022-01-10 18:23:11,352 INFO L226 Difference]: Without dead ends: 69 [2022-01-10 18:23:11,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 18:23:11,354 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:11,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 255 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 18:23:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-10 18:23:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2022-01-10 18:23:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (28), 14 states have call predecessors, (28), 11 states have call successors, (28) [2022-01-10 18:23:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-01-10 18:23:11,365 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 70 [2022-01-10 18:23:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:11,366 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-01-10 18:23:11,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-10 18:23:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-01-10 18:23:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 18:23:11,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:11,367 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:11,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 18:23:11,590 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 [2022-01-10 18:23:11,591 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2090305454, now seen corresponding path program 1 times [2022-01-10 18:23:11,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:11,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406227356] [2022-01-10 18:23:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:11,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 18:23:11,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406227356] [2022-01-10 18:23:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406227356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765058816] [2022-01-10 18:23:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:11,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:11,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:11,884 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) [2022-01-10 18:23:11,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:23:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 18:23:12,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-01-10 18:23:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765058816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:12,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:12,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-10 18:23:12,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502349769] [2022-01-10 18:23:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:12,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:23:12,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:23:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:23:12,832 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 18 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2022-01-10 18:23:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:13,137 INFO L93 Difference]: Finished difference Result 135 states and 219 transitions. [2022-01-10 18:23:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:23:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 74 [2022-01-10 18:23:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:13,138 INFO L225 Difference]: With dead ends: 135 [2022-01-10 18:23:13,139 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 18:23:13,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:23:13,140 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:13,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:23:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 18:23:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-01-10 18:23:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 14 states have call successors, (14), 6 states have call predecessors, (14), 14 states have return successors, (44), 20 states have call predecessors, (44), 14 states have call successors, (44) [2022-01-10 18:23:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 110 transitions. [2022-01-10 18:23:13,154 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 110 transitions. Word has length 74 [2022-01-10 18:23:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:13,154 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 110 transitions. [2022-01-10 18:23:13,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2022-01-10 18:23:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 110 transitions. [2022-01-10 18:23:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 18:23:13,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:13,156 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:13,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 18:23:13,375 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 [2022-01-10 18:23:13,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1096975655, now seen corresponding path program 1 times [2022-01-10 18:23:13,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:13,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129152497] [2022-01-10 18:23:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:13,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 18:23:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 18:23:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 30 proven. 192 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-01-10 18:23:14,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129152497] [2022-01-10 18:23:14,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129152497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749545843] [2022-01-10 18:23:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:14,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:14,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:14,109 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) [2022-01-10 18:23:14,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:23:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:23:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates...