/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/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:19:47,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:19:47,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:19:47,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:19:47,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:19:47,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:19:47,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:19:47,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:19:47,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:19:47,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:19:47,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:19:47,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:19:47,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:19:47,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:19:47,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:19:47,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:19:47,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:19:47,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:19:47,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:19:47,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:19:47,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:19:47,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:19:47,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:19:47,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:19:47,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:19:47,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:19:47,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:19:47,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:19:47,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:19:47,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:19:47,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:19:47,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:19:47,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:19:47,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:19:47,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:19:47,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:19:47,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:19:47,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:19:47,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:19:47,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:19:47,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:19:47,632 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 18:19:47,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:19:47,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:19:47,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:19:47,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:19:47,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:19:47,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:19:47,647 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:19:47,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:19:47,648 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:19:47,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:19:47,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:19:47,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:19:47,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:19:47,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:19:47,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:19:47,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:19:47,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:19:47,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:19:47,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:19:47,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:19:47,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:19:47,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:19:47,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:19:47,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:19:47,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:19:47,661 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:19:47,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:19:47,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:19:47,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:19:47,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:19:47,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:19:47,863 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:19:47,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2022-01-10 18:19:47,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744402982/047a2a5b0af4435a97d1ad7957536bc1/FLAG7e010255e [2022-01-10 18:19:48,242 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:19:48,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2022-01-10 18:19:48,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744402982/047a2a5b0af4435a97d1ad7957536bc1/FLAG7e010255e [2022-01-10 18:19:48,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744402982/047a2a5b0af4435a97d1ad7957536bc1 [2022-01-10 18:19:48,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:19:48,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:19:48,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:19:48,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:19:48,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:19:48,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685328ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48, skipping insertion in model container [2022-01-10 18:19:48,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:19:48,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:19:48,860 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/Fibonacci04.c[780,793] [2022-01-10 18:19:48,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:19:48,869 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:19:48,878 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/Fibonacci04.c[780,793] [2022-01-10 18:19:48,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:19:48,886 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:19:48,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48 WrapperNode [2022-01-10 18:19:48,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:19:48,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:19:48,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:19:48,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:19:48,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,904 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-01-10 18:19:48,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:19:48,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:19:48,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:19:48,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:19:48,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:19:48,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:19:48,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:19:48,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:19:48,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 18:19:48,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:19:48,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:48,952 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 18:19:48,966 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 18:19:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-01-10 18:19:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-01-10 18:19:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:19:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:19:48,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:19:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:19:49,065 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:19:49,067 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:19:49,188 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:19:49,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:19:49,193 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:19:49,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:49 BoogieIcfgContainer [2022-01-10 18:19:49,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:19:49,194 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:19:49,194 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:19:49,208 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:19:49,211 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:49" (1/1) ... [2022-01-10 18:19:49,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:19:49 BasicIcfg [2022-01-10 18:19:49,262 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:19:49,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:19:49,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:19:49,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:19:49,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:19:48" (1/4) ... [2022-01-10 18:19:49,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702dfcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:49, skipping insertion in model container [2022-01-10 18:19:49,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (2/4) ... [2022-01-10 18:19:49,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702dfcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:49, skipping insertion in model container [2022-01-10 18:19:49,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:49" (3/4) ... [2022-01-10 18:19:49,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702dfcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:19:49, skipping insertion in model container [2022-01-10 18:19:49,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:19:49" (4/4) ... [2022-01-10 18:19:49,267 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.cTransformedIcfg [2022-01-10 18:19:49,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:19:49,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:19:49,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:19:49,301 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 18:19:49,302 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:19:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 18:19:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:19:49,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:49,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:49,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash 831073435, now seen corresponding path program 1 times [2022-01-10 18:19:49,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39353129] [2022-01-10 18:19:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:49,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:49,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:19:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:49,572 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 18:19:49,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39353129] [2022-01-10 18:19:49,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39353129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:19:49,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:19:49,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:19:49,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577864441] [2022-01-10 18:19:49,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:19:49,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:19:49,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:19:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:19:49,595 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) 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 18:19:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:49,671 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-01-10 18:19:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:19:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 18:19:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:49,678 INFO L225 Difference]: With dead ends: 30 [2022-01-10 18:19:49,678 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 18:19:49,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:19:49,683 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:49,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 38 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:19:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 18:19:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 18:19:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:19:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 18:19:49,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 18:19:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:49,712 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 18:19:49,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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 18:19:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 18:19:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:19:49,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:49,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:49,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:19:49,714 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 901827128, now seen corresponding path program 1 times [2022-01-10 18:19:49,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:49,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919277606] [2022-01-10 18:19:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:49,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:49,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:19:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:49,782 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 18:19:49,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919277606] [2022-01-10 18:19:49,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919277606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:19:49,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:19:49,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:19:49,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882924283] [2022-01-10 18:19:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:19:49,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:19:49,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:19:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:19:49,785 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) 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 18:19:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:49,832 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 18:19:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:19:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) 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 18:19:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:49,835 INFO L225 Difference]: With dead ends: 23 [2022-01-10 18:19:49,835 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 18:19:49,837 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 18:19:49,838 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:49,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:19:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 18:19:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 18:19:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:19:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 18:19:49,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 18:19:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 18:19:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) 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 18:19:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 18:19:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:19:49,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:49,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:49,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:19:49,845 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:49,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1720611576, now seen corresponding path program 1 times [2022-01-10 18:19:49,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:49,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329701348] [2022-01-10 18:19:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:49,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:49,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:19:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:50,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:50,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:19:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:19:50,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:50,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329701348] [2022-01-10 18:19:50,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329701348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220410872] [2022-01-10 18:19:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:50,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:50,208 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 18:19:50,247 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 18:19:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:50,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 18:19:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:19:50,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:19:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220410872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:50,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:50,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 18 [2022-01-10 18:19:50,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125032547] [2022-01-10 18:19:50,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:50,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:19:50,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:19:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:19:50,737 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 18:19:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:51,136 INFO L93 Difference]: Finished difference Result 37 states and 61 transitions. [2022-01-10 18:19:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 18:19:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-10 18:19:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:51,138 INFO L225 Difference]: With dead ends: 37 [2022-01-10 18:19:51,138 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 18:19:51,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:19:51,139 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:51,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 63 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:19:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 18:19:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-10 18:19:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-01-10 18:19:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 48 transitions. [2022-01-10 18:19:51,148 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 48 transitions. Word has length 22 [2022-01-10 18:19:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:51,149 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 48 transitions. [2022-01-10 18:19:51,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 18:19:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 48 transitions. [2022-01-10 18:19:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 18:19:51,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:51,155 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:51,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 18:19:51,392 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 18:19:51,393 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash -454623176, now seen corresponding path program 1 times [2022-01-10 18:19:51,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:51,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404075548] [2022-01-10 18:19:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:51,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:19:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:19:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:19:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:19:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:19:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:19:51,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404075548] [2022-01-10 18:19:51,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404075548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839659565] [2022-01-10 18:19:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:51,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:51,786 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 18:19:51,791 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 18:19:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:19:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 70 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-10 18:19:52,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:19:52,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839659565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:52,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:52,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 23 [2022-01-10 18:19:52,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004938480] [2022-01-10 18:19:52,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:52,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 18:19:52,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 18:19:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-10 18:19:52,704 INFO L87 Difference]: Start difference. First operand 29 states and 48 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 18:19:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:53,028 INFO L93 Difference]: Finished difference Result 89 states and 214 transitions. [2022-01-10 18:19:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:19:53,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 61 [2022-01-10 18:19:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:53,031 INFO L225 Difference]: With dead ends: 89 [2022-01-10 18:19:53,032 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 18:19:53,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-10 18:19:53,033 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:53,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 125 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:19:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 18:19:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2022-01-10 18:19:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 10 states have return successors, (60), 15 states have call predecessors, (60), 10 states have call successors, (60) [2022-01-10 18:19:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2022-01-10 18:19:53,050 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 61 [2022-01-10 18:19:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:53,051 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2022-01-10 18:19:53,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 18:19:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2022-01-10 18:19:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 18:19:53,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:53,063 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:53,080 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 18:19:53,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 18:19:53,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:53,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1918261480, now seen corresponding path program 2 times [2022-01-10 18:19:53,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:53,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461319236] [2022-01-10 18:19:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:53,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:19:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:19:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:19:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:19:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:19:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:19:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:19:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 49 proven. 108 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-01-10 18:19:53,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461319236] [2022-01-10 18:19:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461319236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:53,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391733773] [2022-01-10 18:19:53,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:19:53,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:53,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:53,762 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 18:19:53,819 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 18:19:54,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:19:54,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:19:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-10 18:19:54,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 42 proven. 95 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-01-10 18:19:56,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391733773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:56,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:56,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 28 [2022-01-10 18:19:56,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795373422] [2022-01-10 18:19:56,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:56,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 18:19:56,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 18:19:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-10 18:19:56,272 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand has 28 states, 23 states have (on average 2.217391304347826) internal successors, (51), 27 states have internal predecessors, (51), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 18:19:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:57,287 INFO L93 Difference]: Finished difference Result 115 states and 272 transitions. [2022-01-10 18:19:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 18:19:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.217391304347826) internal successors, (51), 27 states have internal predecessors, (51), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) Word has length 83 [2022-01-10 18:19:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:57,290 INFO L225 Difference]: With dead ends: 115 [2022-01-10 18:19:57,290 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 18:19:57,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 18:19:57,292 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:57,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 129 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 18:19:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 18:19:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2022-01-10 18:19:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (23), 11 states have call predecessors, (23), 7 states have call successors, (23) [2022-01-10 18:19:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2022-01-10 18:19:57,303 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 83 [2022-01-10 18:19:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:57,303 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2022-01-10 18:19:57,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.217391304347826) internal successors, (51), 27 states have internal predecessors, (51), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 18:19:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2022-01-10 18:19:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-10 18:19:57,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:57,304 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:57,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:57,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:57,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1217827112, now seen corresponding path program 3 times [2022-01-10 18:19:57,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299551293] [2022-01-10 18:19:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:57,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:19:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:19:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:19:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:19:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:19:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-10 18:19:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:19:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:19:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:19:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:19:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-10 18:19:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 221 proven. 529 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2022-01-10 18:19:58,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:58,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299551293] [2022-01-10 18:19:58,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299551293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533960337] [2022-01-10 18:19:58,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:19:58,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:58,592 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 18:19:58,619 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 18:19:58,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-10 18:19:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 18:19:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:20:10,997 WARN L228 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 4485 DAG size of output: 3872 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)