/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:23:39,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:23:39,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:23:39,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:23:39,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:23:39,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:23:39,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:23:39,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:23:39,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:23:39,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:23:39,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:23:39,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:23:39,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:23:39,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:23:39,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:23:39,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:23:39,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:23:39,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:23:39,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:23:39,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:23:39,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:23:39,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:23:39,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:23:39,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:23:39,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:23:39,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:23:39,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:23:39,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:23:39,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:23:39,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:23:39,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:23:39,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:23:39,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:23:39,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:23:39,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:23:39,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:23:39,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:23:39,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:23:39,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:23:39,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:23:39,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:23:39,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:23:39,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:23:39,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:23:39,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:23:39,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:23:39,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:23:39,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:23:39,164 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:23:39,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:23:39,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:23:39,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:23:39,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:23:39,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:23:39,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:23:39,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:23:39,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:23:39,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:23:39,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:23:39,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:23:39,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:23:39,168 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:23:39,168 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:23:39,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:23:39,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:23:39,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:23:39,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:23:39,370 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:23:39,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2022-01-10 18:23:39,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bdf794b5/8676097bdaf34cb59a78943965762f85/FLAGa079d88ae [2022-01-10 18:23:39,752 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:23:39,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2022-01-10 18:23:39,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bdf794b5/8676097bdaf34cb59a78943965762f85/FLAGa079d88ae [2022-01-10 18:23:39,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bdf794b5/8676097bdaf34cb59a78943965762f85 [2022-01-10 18:23:39,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:23:39,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:23:39,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:23:39,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:23:39,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:23:39,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:39,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306e9555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39, skipping insertion in model container [2022-01-10 18:23:39,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:39,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:23:39,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:23:39,956 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/id_i10_o10-2.c[454,467] [2022-01-10 18:23:39,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:23:39,966 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:23:39,975 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c[454,467] [2022-01-10 18:23:39,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:23:39,985 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:23:39,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39 WrapperNode [2022-01-10 18:23:39,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:23:39,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:23:39,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:23:39,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:23:39,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:39,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,007 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-10 18:23:40,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:23:40,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:23:40,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:23:40,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:23:40,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:23:40,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:23:40,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:23:40,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:23:40,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (1/1) ... [2022-01-10 18:23:40,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:23:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:40,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:23:40,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:23:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:23:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:23:40,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:23:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:23:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 18:23:40,084 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 18:23:40,129 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:23:40,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:23:40,214 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:23:40,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:23:40,217 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:23:40,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:40 BoogieIcfgContainer [2022-01-10 18:23:40,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:23:40,218 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:23:40,219 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:23:40,221 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:23:40,223 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:40" (1/1) ... [2022-01-10 18:23:40,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:23:40 BasicIcfg [2022-01-10 18:23:40,258 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:23:40,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:23:40,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:23:40,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:23:40,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:23:39" (1/4) ... [2022-01-10 18:23:40,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9b85f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:23:40, skipping insertion in model container [2022-01-10 18:23:40,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:39" (2/4) ... [2022-01-10 18:23:40,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9b85f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:23:40, skipping insertion in model container [2022-01-10 18:23:40,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:40" (3/4) ... [2022-01-10 18:23:40,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9b85f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:23:40, skipping insertion in model container [2022-01-10 18:23:40,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:23:40" (4/4) ... [2022-01-10 18:23:40,263 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.cTransformedIcfg [2022-01-10 18:23:40,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:23:40,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:23:40,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:23:40,308 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:23:40,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:23:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 18:23:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:23:40,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:40,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:40,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times [2022-01-10 18:23:40,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:40,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467568543] [2022-01-10 18:23:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:40,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:40,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:40,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467568543] [2022-01-10 18:23:40,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467568543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:40,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:40,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:40,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56497162] [2022-01-10 18:23:40,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:40,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:40,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:40,520 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:40,552 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 18:23:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:23:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:40,558 INFO L225 Difference]: With dead ends: 25 [2022-01-10 18:23:40,558 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 18:23:40,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:23:40,562 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:40,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 18:23:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 18:23:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:23:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 18:23:40,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 18:23:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:40,584 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 18:23:40,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 18:23:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 18:23:40,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:40,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:40,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:23:40,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times [2022-01-10 18:23:40,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:40,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403674278] [2022-01-10 18:23:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:40,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:40,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:40,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403674278] [2022-01-10 18:23:40,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403674278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984986039] [2022-01-10 18:23:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:40,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:40,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:40,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:40,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:23:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:23:40,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:40,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:41,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984986039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:41,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:41,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-10 18:23:41,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652853042] [2022-01-10 18:23:41,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:41,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 18:23:41,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 18:23:41,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 18:23:41,099 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 18:23:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:41,167 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 18:23:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 18:23:41,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2022-01-10 18:23:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:41,173 INFO L225 Difference]: With dead ends: 22 [2022-01-10 18:23:41,173 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 18:23:41,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-10 18:23:41,175 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:41,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 18:23:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 18:23:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 18:23:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 18:23:41,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 18:23:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:41,183 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 18:23:41,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 18:23:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 18:23:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:23:41,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:41,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:41,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 18:23:41,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:41,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times [2022-01-10 18:23:41,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988292917] [2022-01-10 18:23:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:41,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:41,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:41,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:23:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988292917] [2022-01-10 18:23:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988292917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:41,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489744134] [2022-01-10 18:23:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:23:41,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:41,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:23:41,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:23:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:23:41,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:23:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489744134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:42,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:42,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-01-10 18:23:42,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403400795] [2022-01-10 18:23:42,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:42,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 18:23:42,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 18:23:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:23:42,154 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 18:23:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:42,262 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 18:23:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:23:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-10 18:23:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:42,263 INFO L225 Difference]: With dead ends: 25 [2022-01-10 18:23:42,263 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 18:23:42,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-10 18:23:42,264 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:42,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 18:23:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 18:23:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 18:23:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 18:23:42,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 18:23:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:42,268 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 18:23:42,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 18:23:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 18:23:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 18:23:42,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:42,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:42,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:42,476 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,SelfDestructingSolverStorable2 [2022-01-10 18:23:42,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times [2022-01-10 18:23:42,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:42,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815675004] [2022-01-10 18:23:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:42,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:42,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:42,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 18:23:42,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815675004] [2022-01-10 18:23:42,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815675004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714959435] [2022-01-10 18:23:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:23:42,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:42,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:42,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:23:42,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 18:23:42,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:42,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:23:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 18:23:42,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:23:43,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714959435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:43,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:43,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-01-10 18:23:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350372069] [2022-01-10 18:23:43,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:43,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 18:23:43,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 18:23:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-10 18:23:43,224 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 18:23:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:43,309 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-10 18:23:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:23:43,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 28 [2022-01-10 18:23:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:43,310 INFO L225 Difference]: With dead ends: 28 [2022-01-10 18:23:43,310 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 18:23:43,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-10 18:23:43,311 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:43,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 88 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 18:23:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 18:23:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 18:23:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-10 18:23:43,315 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-10 18:23:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:43,315 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-10 18:23:43,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 18:23:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-10 18:23:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:23:43,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:43,316 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:43,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:43,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:43,532 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash -41530752, now seen corresponding path program 4 times [2022-01-10 18:23:43,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:43,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527911664] [2022-01-10 18:23:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:43,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:43,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:43,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:43,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 18:23:43,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527911664] [2022-01-10 18:23:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527911664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789520982] [2022-01-10 18:23:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 18:23:43,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:43,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:43,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:23:43,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 18:23:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 18:23:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 18:23:43,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 18:23:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789520982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:44,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:44,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 22 [2022-01-10 18:23:44,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023135655] [2022-01-10 18:23:44,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:44,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 18:23:44,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 18:23:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:23:44,796 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 18:23:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:44,979 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-10 18:23:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:23:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 34 [2022-01-10 18:23:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:44,980 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:23:44,980 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:23:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-10 18:23:44,981 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:44,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:23:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 18:23:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 18:23:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-10 18:23:44,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-10 18:23:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:44,985 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-10 18:23:44,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 18:23:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-10 18:23:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 18:23:44,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:44,986 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:45,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:45,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:45,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -10048123, now seen corresponding path program 5 times [2022-01-10 18:23:45,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881137109] [2022-01-10 18:23:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:45,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 18:23:45,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881137109] [2022-01-10 18:23:45,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881137109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720541741] [2022-01-10 18:23:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 18:23:45,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:45,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:45,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:23:45,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 18:23:45,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 18:23:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 18:23:45,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 18:23:46,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720541741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:46,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:46,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 25 [2022-01-10 18:23:46,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129006895] [2022-01-10 18:23:46,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:46,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 18:23:46,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 18:23:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:23:46,811 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 18:23:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:47,072 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-10 18:23:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 18:23:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 40 [2022-01-10 18:23:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:47,074 INFO L225 Difference]: With dead ends: 34 [2022-01-10 18:23:47,074 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 18:23:47,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-01-10 18:23:47,075 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:47,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 181 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 18:23:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 18:23:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 18:23:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-10 18:23:47,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-10 18:23:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-10 18:23:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 18:23:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-10 18:23:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 18:23:47,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:47,082 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:47,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:47,298 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1028064608, now seen corresponding path program 6 times [2022-01-10 18:23:47,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441440313] [2022-01-10 18:23:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:47,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 18:23:47,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:47,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441440313] [2022-01-10 18:23:47,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441440313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:47,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609161663] [2022-01-10 18:23:47,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 18:23:47,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:47,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:47,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:23:47,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 18:23:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 18:23:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 18:23:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 18:23:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609161663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:49,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:49,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 28 [2022-01-10 18:23:49,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610111643] [2022-01-10 18:23:49,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:49,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 18:23:49,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 18:23:49,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-10 18:23:49,111 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-10 18:23:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:49,358 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-10 18:23:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:23:49,358 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) Word has length 46 [2022-01-10 18:23:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:49,359 INFO L225 Difference]: With dead ends: 37 [2022-01-10 18:23:49,359 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 18:23:49,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 18:23:49,361 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:49,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 187 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 18:23:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 18:23:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 18:23:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-10 18:23:49,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-10 18:23:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:49,364 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-10 18:23:49,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-10 18:23:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-10 18:23:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 18:23:49,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:49,366 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:49,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:49,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:49,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1798148635, now seen corresponding path program 7 times [2022-01-10 18:23:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106500841] [2022-01-10 18:23:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:49,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 18:23:49,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:49,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106500841] [2022-01-10 18:23:49,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106500841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:49,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128359085] [2022-01-10 18:23:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 18:23:49,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:49,820 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) [2022-01-10 18:23:49,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 18:23:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 18:23:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 17 proven. 87 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 18:23:50,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 18:23:57,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128359085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:57,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:57,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 19] total 35 [2022-01-10 18:23:57,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909900161] [2022-01-10 18:23:57,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:57,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 18:23:57,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:57,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 18:23:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 18:23:57,253 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-10 18:23:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:57,718 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-10 18:23:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 18:23:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) Word has length 52 [2022-01-10 18:23:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:57,719 INFO L225 Difference]: With dead ends: 40 [2022-01-10 18:23:57,719 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 18:23:57,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 18:23:57,720 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:57,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 263 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:23:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 18:23:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 18:23:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 18:23:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-10 18:23:57,724 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-10 18:23:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:57,724 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-10 18:23:57,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-10 18:23:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-10 18:23:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 18:23:57,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:57,725 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:57,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-10 18:23:57,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:57,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash 718365376, now seen corresponding path program 8 times [2022-01-10 18:23:57,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:57,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839051149] [2022-01-10 18:23:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:57,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:57,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 18:23:58,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:58,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839051149] [2022-01-10 18:23:58,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839051149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:58,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203769125] [2022-01-10 18:23:58,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:23:58,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:58,287 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) [2022-01-10 18:23:58,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 18:23:58,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:23:58,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:58,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-10 18:23:58,435 INFO L286 TraceCheckSpWp]: Computing forward predicates...