/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_NONE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:11:58,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:11:58,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:11:58,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:11:58,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:11:58,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:11:58,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:11:58,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:11:58,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:11:58,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:11:58,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:11:58,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:11:58,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:11:58,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:11:58,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:11:58,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:11:58,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:11:58,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:11:58,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:11:59,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:11:59,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:11:59,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:11:59,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:11:59,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:11:59,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 00:11:59,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 00:11:59,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 00:11:59,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 00:11:59,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 00:11:59,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 00:11:59,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 00:11:59,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 00:11:59,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 00:11:59,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 00:11:59,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 00:11:59,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 00:11:59,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 00:11:59,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 00:11:59,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:11:59,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:11:59,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:11:59,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:11:59,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:11:59,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:11:59,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:11:59,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:11:59,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:11:59,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:11:59,054 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:11:59,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:11:59,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:11:59,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:11:59,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:11:59,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:11:59,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:11:59,055 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:11:59,055 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:11:59,055 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:11:59,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:11:59,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:11:59,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:11:59,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:11:59,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:11:59,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:11:59,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:11:59,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:11:59,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:11:59,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:11:59,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:11:59,058 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:11:59,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:11:59,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:11:59,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:11:59,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:11:59,059 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:11:59,059 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:11:59,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:11:59,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:11:59,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:11:59,276 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:11:59,277 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:11:59,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2022-01-11 00:11:59,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c0b185e/56733a96be484f94928828e7ea2b53cb/FLAGfb517fdc7 [2022-01-11 00:11:59,710 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:11:59,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2022-01-11 00:11:59,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c0b185e/56733a96be484f94928828e7ea2b53cb/FLAGfb517fdc7 [2022-01-11 00:11:59,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95c0b185e/56733a96be484f94928828e7ea2b53cb [2022-01-11 00:11:59,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:11:59,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:11:59,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:11:59,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:11:59,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:11:59,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625d85ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59, skipping insertion in model container [2022-01-11 00:11:59,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:11:59,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:11:59,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-01-11 00:11:59,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:11:59,890 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:11:59,899 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-01-11 00:11:59,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:11:59,907 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:11:59,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59 WrapperNode [2022-01-11 00:11:59,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:11:59,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:11:59,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:11:59,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:11:59,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,926 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:11:59,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:11:59,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:11:59,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:11:59,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:11:59,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:11:59,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:11:59,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:11:59,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:11:59,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (1/1) ... [2022-01-11 00:11:59,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:11:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:59,966 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 00:11:59,967 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 00:11:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:11:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:11:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-11 00:11:59,995 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-11 00:11:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-11 00:11:59,995 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-11 00:11:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:11:59,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:12:00,035 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:12:00,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:12:00,114 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:12:00,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:12:00,119 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:12:00,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:00 BoogieIcfgContainer [2022-01-11 00:12:00,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:12:00,121 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:12:00,121 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:12:00,122 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:12:00,124 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:00" (1/1) ... [2022-01-11 00:12:00,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:12:00 BasicIcfg [2022-01-11 00:12:00,198 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:12:00,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:12:00,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:12:00,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:12:00,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:11:59" (1/4) ... [2022-01-11 00:12:00,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efec0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:12:00, skipping insertion in model container [2022-01-11 00:12:00,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:59" (2/4) ... [2022-01-11 00:12:00,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efec0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:12:00, skipping insertion in model container [2022-01-11 00:12:00,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:00" (3/4) ... [2022-01-11 00:12:00,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efec0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:12:00, skipping insertion in model container [2022-01-11 00:12:00,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:12:00" (4/4) ... [2022-01-11 00:12:00,215 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.cTransformedIcfg [2022-01-11 00:12:00,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:12:00,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:12:00,250 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:12:00,255 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 00:12:00,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:12:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-11 00:12:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:12:00,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:00,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:00,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-11 00:12:00,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402185039] [2022-01-11 00:12:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:00,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:00,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:00,541 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 00:12:00,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402185039] [2022-01-11 00:12:00,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402185039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:00,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:12:00,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:12:00,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385447026] [2022-01-11 00:12:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:00,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:12:00,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:12:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:12:00,570 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:12:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:00,647 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-11 00:12:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:12:00,649 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 00:12:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:00,658 INFO L225 Difference]: With dead ends: 37 [2022-01-11 00:12:00,658 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 00:12:00,667 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 00:12:00,669 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:00,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:12:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 00:12:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 00:12:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 00:12:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 00:12:00,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-11 00:12:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:00,695 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 00:12:00,695 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 00:12:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 00:12:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:12:00,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:00,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:00,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:12:00,696 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-11 00:12:00,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254698735] [2022-01-11 00:12:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:00,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:00,765 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 00:12:00,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254698735] [2022-01-11 00:12:00,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254698735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:00,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:12:00,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:12:00,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504894737] [2022-01-11 00:12:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:00,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:12:00,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:12:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:12:00,768 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:12:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:00,808 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-11 00:12:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:12:00,808 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 00:12:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:00,809 INFO L225 Difference]: With dead ends: 31 [2022-01-11 00:12:00,809 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 00:12:00,809 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 00:12:00,810 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:00,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:12:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 00:12:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-11 00:12:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 00:12:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 00:12:00,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-11 00:12:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:00,816 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 00:12:00,816 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 00:12:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 00:12:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:12:00,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:00,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:00,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:12:00,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-11 00:12:00,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:00,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368867861] [2022-01-11 00:12:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:00,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:00,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:00,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:01,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:12:01,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368867861] [2022-01-11 00:12:01,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368867861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405107112] [2022-01-11 00:12:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:01,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:01,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:01,064 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 00:12:01,065 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 00:12:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:01,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 00:12:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:12:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:12:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405107112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:01,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-11 00:12:01,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17676192] [2022-01-11 00:12:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 00:12:01,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 00:12:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:12:01,897 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 00:12:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:02,108 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-11 00:12:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:12:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-01-11 00:12:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:02,110 INFO L225 Difference]: With dead ends: 37 [2022-01-11 00:12:02,110 INFO L226 Difference]: Without dead ends: 33 [2022-01-11 00:12:02,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-11 00:12:02,111 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:02,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 97 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:12:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-11 00:12:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-11 00:12:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:12:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-11 00:12:02,117 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-11 00:12:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:02,118 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-11 00:12:02,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 00:12:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-11 00:12:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 00:12:02,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:02,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:02,149 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 00:12:02,349 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 00:12:02,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash -992157507, now seen corresponding path program 1 times [2022-01-11 00:12:02,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:02,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241270857] [2022-01-11 00:12:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:02,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:02,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:12:02,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241270857] [2022-01-11 00:12:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241270857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31538818] [2022-01-11 00:12:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:02,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:02,504 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 00:12:02,505 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 00:12:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:12:02,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:12:02,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:12:02,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31538818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:02,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:02,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-11 00:12:02,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436197775] [2022-01-11 00:12:02,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:02,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 00:12:02,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 00:12:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:12:02,851 INFO L87 Difference]: Start difference. First operand 29 states and 39 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, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 00:12:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:02,980 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2022-01-11 00:12:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 00:12:02,981 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, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2022-01-11 00:12:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:02,985 INFO L225 Difference]: With dead ends: 63 [2022-01-11 00:12:02,985 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 00:12:02,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:12:02,988 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:02,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:12:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 00:12:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-11 00:12:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-11 00:12:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-11 00:12:03,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2022-01-11 00:12:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:03,010 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-11 00:12:03,012 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, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 00:12:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-11 00:12:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 00:12:03,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:03,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:03,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 00:12:03,223 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 00:12:03,224 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1662558092, now seen corresponding path program 1 times [2022-01-11 00:12:03,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766091725] [2022-01-11 00:12:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:03,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:12:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:12:03,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:03,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766091725] [2022-01-11 00:12:03,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766091725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:03,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318459267] [2022-01-11 00:12:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:03,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:03,483 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 00:12:03,484 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 00:12:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 00:12:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:12:03,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 00:12:03,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318459267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:03,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 00:12:03,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2022-01-11 00:12:03,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414142788] [2022-01-11 00:12:03,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:03,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 00:12:03,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 00:12:03,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:12:03,687 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-11 00:12:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:03,775 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2022-01-11 00:12:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 00:12:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-01-11 00:12:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:03,777 INFO L225 Difference]: With dead ends: 63 [2022-01-11 00:12:03,777 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 00:12:03,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-11 00:12:03,778 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:03,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:12:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 00:12:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-11 00:12:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.2) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-11 00:12:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2022-01-11 00:12:03,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 34 [2022-01-11 00:12:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:03,783 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2022-01-11 00:12:03,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-11 00:12:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2022-01-11 00:12:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 00:12:03,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:03,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:03,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 00:12:03,992 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 00:12:03,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 1 times [2022-01-11 00:12:03,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:03,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598019730] [2022-01-11 00:12:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:03,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:12:04,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:04,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598019730] [2022-01-11 00:12:04,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598019730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278087814] [2022-01-11 00:12:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:04,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:04,177 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 00:12:04,206 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 00:12:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:04,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:12:04,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:12:04,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:12:04,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278087814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:04,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:04,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-11 00:12:04,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618946064] [2022-01-11 00:12:04,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:04,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 00:12:04,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 00:12:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-11 00:12:04,894 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 00:12:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:05,320 INFO L93 Difference]: Finished difference Result 97 states and 166 transitions. [2022-01-11 00:12:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 00:12:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-11 00:12:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:05,322 INFO L225 Difference]: With dead ends: 97 [2022-01-11 00:12:05,324 INFO L226 Difference]: Without dead ends: 56 [2022-01-11 00:12:05,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-11 00:12:05,326 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:05,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 206 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 00:12:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-11 00:12:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-01-11 00:12:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 34 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-11 00:12:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2022-01-11 00:12:05,332 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 35 [2022-01-11 00:12:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:05,332 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2022-01-11 00:12:05,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 00:12:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2022-01-11 00:12:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 00:12:05,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:05,334 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:05,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:05,543 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 00:12:05,543 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1567662105, now seen corresponding path program 2 times [2022-01-11 00:12:05,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768067294] [2022-01-11 00:12:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:05,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:12:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:12:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-11 00:12:05,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:05,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768067294] [2022-01-11 00:12:05,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768067294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:05,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072704137] [2022-01-11 00:12:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:12:05,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:05,922 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 00:12:05,924 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 00:12:06,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:12:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:12:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 00:12:06,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 00:12:09,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072704137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:09,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:09,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-11 00:12:09,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699509314] [2022-01-11 00:12:09,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:09,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 00:12:09,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:09,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 00:12:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-01-11 00:12:09,645 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-11 00:12:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:11,504 INFO L93 Difference]: Finished difference Result 112 states and 170 transitions. [2022-01-11 00:12:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 00:12:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) Word has length 46 [2022-01-11 00:12:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:11,506 INFO L225 Difference]: With dead ends: 112 [2022-01-11 00:12:11,506 INFO L226 Difference]: Without dead ends: 63 [2022-01-11 00:12:11,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-11 00:12:11,508 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:11,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 263 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-11 00:12:11,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-11 00:12:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-01-11 00:12:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-11 00:12:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2022-01-11 00:12:11,525 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 46 [2022-01-11 00:12:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:11,525 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2022-01-11 00:12:11,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-11 00:12:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2022-01-11 00:12:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-11 00:12:11,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:11,527 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:11,535 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 00:12:11,727 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 00:12:11,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2052768956, now seen corresponding path program 1 times [2022-01-11 00:12:11,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:11,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749153635] [2022-01-11 00:12:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:11,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:12:11,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749153635] [2022-01-11 00:12:11,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749153635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500549582] [2022-01-11 00:12:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:11,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:11,905 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 00:12:11,906 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 00:12:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:12:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:12:12,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 00:12:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500549582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:12,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:12,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-11 00:12:12,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183453879] [2022-01-11 00:12:12,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 00:12:12,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 00:12:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-11 00:12:12,537 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:12:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:12,870 INFO L93 Difference]: Finished difference Result 130 states and 203 transitions. [2022-01-11 00:12:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:12:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 48 [2022-01-11 00:12:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:12,872 INFO L225 Difference]: With dead ends: 130 [2022-01-11 00:12:12,873 INFO L226 Difference]: Without dead ends: 78 [2022-01-11 00:12:12,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-11 00:12:12,874 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:12,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 253 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 00:12:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-11 00:12:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-01-11 00:12:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 13 states have call successors, (13), 6 states have call predecessors, (13), 14 states have return successors, (41), 20 states have call predecessors, (41), 13 states have call successors, (41) [2022-01-11 00:12:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 105 transitions. [2022-01-11 00:12:12,893 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 105 transitions. Word has length 48 [2022-01-11 00:12:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:12,893 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 105 transitions. [2022-01-11 00:12:12,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:12:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 105 transitions. [2022-01-11 00:12:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-11 00:12:12,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:12,895 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:12,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:13,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:13,096 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1457684086, now seen corresponding path program 1 times [2022-01-11 00:12:13,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382762045] [2022-01-11 00:12:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:13,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 00:12:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-11 00:12:13,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:13,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382762045] [2022-01-11 00:12:13,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382762045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:13,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319833911] [2022-01-11 00:12:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:13,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:13,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:12:13,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 00:12:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:13,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:12:13,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-11 00:12:13,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-11 00:12:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319833911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:14,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:14,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 24 [2022-01-11 00:12:14,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748633931] [2022-01-11 00:12:14,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:14,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 00:12:14,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 00:12:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-11 00:12:14,147 INFO L87 Difference]: Start difference. First operand 73 states and 105 transitions. Second operand has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 00:12:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:14,927 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2022-01-11 00:12:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-11 00:12:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) Word has length 60 [2022-01-11 00:12:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:14,930 INFO L225 Difference]: With dead ends: 194 [2022-01-11 00:12:14,930 INFO L226 Difference]: Without dead ends: 118 [2022-01-11 00:12:14,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 00:12:14,931 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:14,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 258 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 00:12:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-11 00:12:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2022-01-11 00:12:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 16 states have call successors, (16), 8 states have call predecessors, (16), 19 states have return successors, (54), 26 states have call predecessors, (54), 16 states have call successors, (54) [2022-01-11 00:12:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-11 00:12:14,959 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 60 [2022-01-11 00:12:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:14,959 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-11 00:12:14,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 00:12:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-11 00:12:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-11 00:12:14,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:14,961 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:14,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:15,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:15,176 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -678201443, now seen corresponding path program 1 times [2022-01-11 00:12:15,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78181349] [2022-01-11 00:12:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:15,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-11 00:12:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 97 proven. 152 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-01-11 00:12:15,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78181349] [2022-01-11 00:12:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78181349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275447336] [2022-01-11 00:12:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:15,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:15,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:12:15,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 00:12:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:12:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 129 proven. 32 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-01-11 00:12:16,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 129 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-01-11 00:12:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275447336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:17,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:17,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 11] total 31 [2022-01-11 00:12:17,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121455526] [2022-01-11 00:12:17,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:17,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-11 00:12:17,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-11 00:12:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-11 00:12:17,008 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-11 00:12:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:17,902 INFO L93 Difference]: Finished difference Result 245 states and 403 transitions. [2022-01-11 00:12:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-11 00:12:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) Word has length 136 [2022-01-11 00:12:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:17,905 INFO L225 Difference]: With dead ends: 245 [2022-01-11 00:12:17,905 INFO L226 Difference]: Without dead ends: 147 [2022-01-11 00:12:17,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-01-11 00:12:17,907 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:17,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 370 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 00:12:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-11 00:12:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2022-01-11 00:12:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 22 states have call successors, (22), 11 states have call predecessors, (22), 26 states have return successors, (74), 35 states have call predecessors, (74), 22 states have call successors, (74) [2022-01-11 00:12:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-11 00:12:17,935 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 136 [2022-01-11 00:12:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:17,936 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-11 00:12:17,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-11 00:12:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-11 00:12:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-11 00:12:17,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:17,937 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:17,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:18,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-11 00:12:18,152 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 449086984, now seen corresponding path program 2 times [2022-01-11 00:12:18,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873013332] [2022-01-11 00:12:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:12:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-11 00:12:18,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873013332] [2022-01-11 00:12:18,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873013332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:18,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442619372] [2022-01-11 00:12:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:12:18,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:18,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:12:18,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-11 00:12:19,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:12:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-11 00:12:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-11 00:12:19,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-01-11 00:12:20,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442619372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:20,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:20,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 9] total 41 [2022-01-11 00:12:20,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947540612] [2022-01-11 00:12:20,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:20,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-11 00:12:20,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-11 00:12:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 00:12:20,492 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-11 00:12:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:22,245 INFO L93 Difference]: Finished difference Result 254 states and 422 transitions. [2022-01-11 00:12:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-11 00:12:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) Word has length 98 [2022-01-11 00:12:22,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:22,248 INFO L225 Difference]: With dead ends: 254 [2022-01-11 00:12:22,248 INFO L226 Difference]: Without dead ends: 128 [2022-01-11 00:12:22,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=473, Invalid=3433, Unknown=0, NotChecked=0, Total=3906 [2022-01-11 00:12:22,250 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:22,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 562 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-11 00:12:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-11 00:12:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2022-01-11 00:12:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 19 states have call successors, (19), 10 states have call predecessors, (19), 22 states have return successors, (67), 30 states have call predecessors, (67), 19 states have call successors, (67) [2022-01-11 00:12:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 161 transitions. [2022-01-11 00:12:22,262 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 161 transitions. Word has length 98 [2022-01-11 00:12:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:22,263 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 161 transitions. [2022-01-11 00:12:22,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-11 00:12:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 161 transitions. [2022-01-11 00:12:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-11 00:12:22,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:22,264 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:22,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-11 00:12:22,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:22,469 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1981903082, now seen corresponding path program 3 times [2022-01-11 00:12:22,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:22,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973518313] [2022-01-11 00:12:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:22,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:12:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-11 00:12:23,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:23,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973518313] [2022-01-11 00:12:23,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973518313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094125111] [2022-01-11 00:12:23,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:12:23,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:23,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:23,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:12:23,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-11 00:12:23,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-11 00:12:23,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-11 00:12:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-11 00:12:25,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-11 00:12:44,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094125111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:44,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:44,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 53 [2022-01-11 00:12:44,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523052599] [2022-01-11 00:12:44,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:44,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-11 00:12:44,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-11 00:12:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-11 00:12:44,933 INFO L87 Difference]: Start difference. First operand 112 states and 161 transitions. Second operand has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) [2022-01-11 00:12:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:45,248 INFO L93 Difference]: Finished difference Result 133 states and 198 transitions. [2022-01-11 00:12:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-11 00:12:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) Word has length 99 [2022-01-11 00:12:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:45,250 INFO L225 Difference]: With dead ends: 133 [2022-01-11 00:12:45,250 INFO L226 Difference]: Without dead ends: 129 [2022-01-11 00:12:45,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-11 00:12:45,251 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:45,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1649 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-01-11 00:12:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-11 00:12:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-01-11 00:12:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 77 states have internal predecessors, (81), 22 states have call successors, (22), 10 states have call predecessors, (22), 25 states have return successors, (83), 36 states have call predecessors, (83), 22 states have call successors, (83) [2022-01-11 00:12:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2022-01-11 00:12:45,292 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 99 [2022-01-11 00:12:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:45,292 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2022-01-11 00:12:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) [2022-01-11 00:12:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2022-01-11 00:12:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-11 00:12:45,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:45,294 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:45,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:45,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-11 00:12:45,498 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 109842369, now seen corresponding path program 4 times [2022-01-11 00:12:45,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:45,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524822373] [2022-01-11 00:12:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:45,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:45,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:12:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-11 00:12:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 140 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-01-11 00:12:46,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:46,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524822373] [2022-01-11 00:12:46,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524822373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:46,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415718262] [2022-01-11 00:12:46,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:12:46,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:46,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:12:46,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-11 00:12:46,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:12:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-11 00:12:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:56,459 WARN L228 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 4197 DAG size of output: 1869 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)