/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:59:22,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:59:22,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:59:22,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:59:22,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:59:22,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:59:22,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:59:22,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:59:22,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:59:22,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:59:22,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:59:22,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:59:22,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:59:22,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:59:22,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:59:22,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:59:22,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:59:22,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:59:22,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:59:22,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:59:22,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:59:22,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:59:22,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:59:22,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:59:22,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:59:22,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:59:22,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:59:22,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:59:22,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:59:22,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:59:22,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:59:22,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:59:22,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:59:22,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:59:22,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:59:22,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:59:22,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:59:22,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:59:22,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:59:22,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:59:22,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:59:22,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:59:22,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:59:22,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:59:22,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:59:22,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:59:22,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:59:22,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:59:22,194 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:59:22,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:59:22,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:59:22,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:59:22,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:59:22,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:59:22,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:59:22,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:59:22,195 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:59:22,195 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:59:22,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:59:22,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:59:22,196 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:59:22,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:59:22,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:59:22,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:59:22,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:59:22,198 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:59:22,198 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:59:22,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:59:22,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:59:22,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:59:22,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:59:22,412 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:59:22,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-11 05:59:22,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc094156e/ffc001f9c61544349b55416383204b04/FLAG866a8eb09 [2022-01-11 05:59:22,812 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:59:22,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-11 05:59:22,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc094156e/ffc001f9c61544349b55416383204b04/FLAG866a8eb09 [2022-01-11 05:59:22,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc094156e/ffc001f9c61544349b55416383204b04 [2022-01-11 05:59:22,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:59:22,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:59:22,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:59:22,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:59:22,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:59:22,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:22,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e14f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22, skipping insertion in model container [2022-01-11 05:59:22,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:22,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:59:22,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:59:22,946 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_25-2.c[746,759] [2022-01-11 05:59:22,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:59:22,967 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:59:22,975 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_25-2.c[746,759] [2022-01-11 05:59:22,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:59:22,983 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:59:22,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22 WrapperNode [2022-01-11 05:59:22,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:59:22,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:59:22,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:59:22,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:59:22,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:22,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,008 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 05:59:23,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:59:23,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:59:23,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:59:23,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:59:23,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:59:23,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:59:23,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:59:23,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:59:23,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (1/1) ... [2022-01-11 05:59:23,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:59:23,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:23,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:59:23,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:59:23,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:59:23,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:59:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:59:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:59:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 05:59:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 05:59:23,117 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:59:23,118 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:59:23,211 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:59:23,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:59:23,216 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:59:23,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:23 BoogieIcfgContainer [2022-01-11 05:59:23,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:59:23,218 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:59:23,218 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:59:23,219 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:59:23,221 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:23" (1/1) ... [2022-01-11 05:59:23,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:59:23 BasicIcfg [2022-01-11 05:59:23,290 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:59:23,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:59:23,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:59:23,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:59:23,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:59:22" (1/4) ... [2022-01-11 05:59:23,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ed2d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:59:23, skipping insertion in model container [2022-01-11 05:59:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:59:22" (2/4) ... [2022-01-11 05:59:23,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ed2d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:59:23, skipping insertion in model container [2022-01-11 05:59:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:59:23" (3/4) ... [2022-01-11 05:59:23,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ed2d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:59:23, skipping insertion in model container [2022-01-11 05:59:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:59:23" (4/4) ... [2022-01-11 05:59:23,295 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_25-2.cTransformedIcfg [2022-01-11 05:59:23,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:59:23,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:59:23,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:59:23,359 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:59:23,360 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:59:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-01-11 05:59:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 05:59:23,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:23,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:23,384 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 05:59:23,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:23,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665260540] [2022-01-11 05:59:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:23,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:59:23,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665260540] [2022-01-11 05:59:23,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665260540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:59:23,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:59:23,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:59:23,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139261490] [2022-01-11 05:59:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:59:23,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:59:23,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:59:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:59:23,696 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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, 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) [2022-01-11 05:59:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:23,784 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 05:59:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:59:23,786 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 [2022-01-11 05:59:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:23,795 INFO L225 Difference]: With dead ends: 29 [2022-01-11 05:59:23,795 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 05:59:23,800 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 [2022-01-11 05:59:23,803 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:23,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:59:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 05:59:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 05:59:23,830 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) [2022-01-11 05:59:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 05:59:23,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 05:59:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:23,831 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 05:59:23,831 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) [2022-01-11 05:59:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 05:59:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 05:59:23,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:23,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:23,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:59:23,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 05:59:23,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017423158] [2022-01-11 05:59:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:23,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:23,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:59:23,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:23,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017423158] [2022-01-11 05:59:23,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017423158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:59:23,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:59:23,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:59:23,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218344080] [2022-01-11 05:59:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:59:23,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:59:23,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:59:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:59:23,878 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:59:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:23,910 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 05:59:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:59:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 05:59:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:23,911 INFO L225 Difference]: With dead ends: 23 [2022-01-11 05:59:23,911 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 05:59:23,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:59:23,912 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:23,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:59:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 05:59:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 05:59:23,916 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) [2022-01-11 05:59:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 05:59:23,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 05:59:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:23,917 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 05:59:23,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:59:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 05:59:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 05:59:23,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:23,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:59:23,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 05:59:23,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:23,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123601571] [2022-01-11 05:59:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:23,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:23,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:24,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:59:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:59:24,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123601571] [2022-01-11 05:59:24,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123601571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250226700] [2022-01-11 05:59:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:24,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:24,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:24,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:24,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:59:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 05:59:24,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:59:24,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:59:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250226700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:25,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:25,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 05:59:25,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108378174] [2022-01-11 05:59:25,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:25,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 05:59:25,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:25,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 05:59:25,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:59:25,139 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 05:59:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:25,791 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 05:59:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:59:25,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-11 05:59:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:25,794 INFO L225 Difference]: With dead ends: 46 [2022-01-11 05:59:25,794 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 05:59:25,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-11 05:59:25,795 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:25,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 05:59:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 05:59:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 05:59:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 05:59:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 05:59:25,810 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 05:59:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:25,810 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 05:59:25,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 05:59:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 05:59:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:59:25,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:25,812 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:25,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:59:26,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:26,013 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 05:59:26,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:26,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134274116] [2022-01-11 05:59:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:26,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 05:59:26,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134274116] [2022-01-11 05:59:26,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134274116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626408584] [2022-01-11 05:59:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:26,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:26,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:26,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:59:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 05:59:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 05:59:26,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 05:59:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626408584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:26,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:26,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 05:59:26,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405640150] [2022-01-11 05:59:26,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:26,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 05:59:26,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 05:59:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:59:26,688 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 05:59:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:26,807 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 05:59:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:59:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-11 05:59:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:26,809 INFO L225 Difference]: With dead ends: 43 [2022-01-11 05:59:26,809 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 05:59:26,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 05:59:26,810 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:26,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:59:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 05:59:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 05:59:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-11 05:59:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 05:59:26,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 05:59:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:26,830 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 05:59:26,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 05:59:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 05:59:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 05:59:26,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:26,833 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:26,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:59:27,047 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 [2022-01-11 05:59:27,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 05:59:27,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:27,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589555069] [2022-01-11 05:59:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:27,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 05:59:27,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589555069] [2022-01-11 05:59:27,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589555069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803553149] [2022-01-11 05:59:27,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:59:27,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:27,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:27,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:59:27,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:59:27,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:59:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 05:59:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-11 05:59:27,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 05:59:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803553149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:27,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:27,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 05:59:27,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021001885] [2022-01-11 05:59:27,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:27,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 05:59:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 05:59:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 05:59:27,947 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 05:59:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:28,200 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-11 05:59:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:59:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-11 05:59:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:28,205 INFO L225 Difference]: With dead ends: 81 [2022-01-11 05:59:28,205 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 05:59:28,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-11 05:59:28,207 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:28,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 05:59:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 05:59:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-11 05:59:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-11 05:59:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-11 05:59:28,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-11 05:59:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:28,226 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-11 05:59:28,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 05:59:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-11 05:59:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-11 05:59:28,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:28,232 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:28,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 05:59:28,443 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 [2022-01-11 05:59:28,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-11 05:59:28,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:28,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507501156] [2022-01-11 05:59:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:28,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:59:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 05:59:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 05:59:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:59:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 05:59:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 05:59:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-11 05:59:28,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507501156] [2022-01-11 05:59:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507501156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121414911] [2022-01-11 05:59:28,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:59:28,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:28,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:28,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:59:29,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:59:29,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:59:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 05:59:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 89 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-11 05:59:29,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-01-11 05:59:32,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121414911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:32,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:32,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-11 05:59:32,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469057568] [2022-01-11 05:59:32,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:32,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-11 05:59:32,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-11 05:59:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-11 05:59:32,107 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-11 05:59:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:32,639 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2022-01-11 05:59:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:59:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) Word has length 82 [2022-01-11 05:59:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:32,641 INFO L225 Difference]: With dead ends: 85 [2022-01-11 05:59:32,641 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 05:59:32,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-01-11 05:59:32,643 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:32,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 05:59:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 05:59:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-11 05:59:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 05:59:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-11 05:59:32,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 82 [2022-01-11 05:59:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:32,652 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-11 05:59:32,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-11 05:59:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-11 05:59:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 05:59:32,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:32,653 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:32,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 05:59:32,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:32,853 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1832080039, now seen corresponding path program 3 times [2022-01-11 05:59:32,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267725937] [2022-01-11 05:59:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:32,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:32,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:32,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:33,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:33,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:59:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:33,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 05:59:33,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267725937] [2022-01-11 05:59:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267725937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078973014] [2022-01-11 05:59:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:59:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:33,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:33,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 05:59:33,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 05:59:33,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:59:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 05:59:33,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:59:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 24 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-11 05:59:33,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:59:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 05:59:33,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078973014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:59:33,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:59:33,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-11 05:59:33,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038538381] [2022-01-11 05:59:33,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:59:33,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 05:59:33,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:59:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 05:59:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-11 05:59:33,601 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-11 05:59:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:59:33,858 INFO L93 Difference]: Finished difference Result 80 states and 128 transitions. [2022-01-11 05:59:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 05:59:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2022-01-11 05:59:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:59:33,859 INFO L225 Difference]: With dead ends: 80 [2022-01-11 05:59:33,859 INFO L226 Difference]: Without dead ends: 51 [2022-01-11 05:59:33,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-11 05:59:33,861 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:59:33,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 107 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:59:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-11 05:59:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-01-11 05:59:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 9 states have return successors, (25), 11 states have call predecessors, (25), 6 states have call successors, (25) [2022-01-11 05:59:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-01-11 05:59:33,867 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 61 [2022-01-11 05:59:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:59:33,867 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-01-11 05:59:33,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-11 05:59:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-01-11 05:59:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-11 05:59:33,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:59:33,869 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 19, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:59:33,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-11 05:59:34,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:34,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:59:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:59:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1914785645, now seen corresponding path program 4 times [2022-01-11 05:59:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:59:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893909580] [2022-01-11 05:59:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:59:34,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:59:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:59:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:59:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:59:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-11 05:59:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:59:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:59:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:59:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:59:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:59:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 95 proven. 298 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2022-01-11 05:59:34,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:59:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893909580] [2022-01-11 05:59:34,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893909580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:59:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431628588] [2022-01-11 05:59:34,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 05:59:34,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:59:34,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:59:34,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:59:34,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 05:59:34,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 05:59:34,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:59:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 05:59:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates...