/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:03:26,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:03:26,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:03:26,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:03:26,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:03:26,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:03:26,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:03:26,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:03:26,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:03:26,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:03:26,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:03:26,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:03:26,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:03:26,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:03:26,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:03:26,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:03:26,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:03:26,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:03:26,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:03:26,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:03:26,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:03:26,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:03:26,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:03:26,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:03:26,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:03:26,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:03:26,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:03:26,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:03:26,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:03:26,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:03:26,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:03:26,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:03:26,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:03:26,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:03:26,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:03:26,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:03:26,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:03:26,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:03:26,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:03:26,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:03:26,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:03:26,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 06:03:26,207 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:03:26,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:03:26,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:03:26,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:03:26,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:03:26,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:03:26,209 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:03:26,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:03:26,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:03:26,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:03:26,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:03:26,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:03:26,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:03:26,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:03:26,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:03:26,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:03:26,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:03:26,214 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:03:26,214 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:03:26,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:03:26,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:03:26,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:03:26,438 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:03:26,439 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:03:26,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max.c [2022-01-11 06:03:26,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f943c1bec/9a44f333feaf44ba8c2413b53a9a4d72/FLAGa0c4c8141 [2022-01-11 06:03:26,814 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:03:26,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c [2022-01-11 06:03:26,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f943c1bec/9a44f333feaf44ba8c2413b53a9a4d72/FLAGa0c4c8141 [2022-01-11 06:03:27,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f943c1bec/9a44f333feaf44ba8c2413b53a9a4d72 [2022-01-11 06:03:27,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:03:27,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:03:27,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:03:27,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:03:27,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:03:27,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4b79ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27, skipping insertion in model container [2022-01-11 06:03:27,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:03:27,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:03:27,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-11 06:03:27,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:03:27,426 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-11 06:03:27,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:03:27,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-11 06:03:27,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:03:27,445 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:03:27,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-11 06:03:27,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:03:27,479 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:03:27,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27 WrapperNode [2022-01-11 06:03:27,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:03:27,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:03:27,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:03:27,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:03:27,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,527 INFO L137 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-01-11 06:03:27,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:03:27,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:03:27,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:03:27,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:03:27,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:03:27,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:03:27,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:03:27,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:03:27,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:27,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:03:27,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:03:27,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 06:03:27,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 06:03:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:03:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:03:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-11 06:03:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 06:03:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-11 06:03:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-11 06:03:27,600 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-11 06:03:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-01-11 06:03:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-01-11 06:03:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-01-11 06:03:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-01-11 06:03:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 06:03:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:03:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:03:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 06:03:27,696 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:03:27,697 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:03:27,947 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:03:27,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:03:27,953 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 06:03:27,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:03:27 BoogieIcfgContainer [2022-01-11 06:03:27,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:03:27,955 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:03:27,955 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:03:27,958 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:03:27,960 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:03:27" (1/1) ... [2022-01-11 06:03:28,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:03:28 BasicIcfg [2022-01-11 06:03:28,060 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:03:28,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:03:28,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:03:28,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:03:28,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:03:27" (1/4) ... [2022-01-11 06:03:28,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd61266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:03:28, skipping insertion in model container [2022-01-11 06:03:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:03:27" (2/4) ... [2022-01-11 06:03:28,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd61266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:03:28, skipping insertion in model container [2022-01-11 06:03:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:03:27" (3/4) ... [2022-01-11 06:03:28,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd61266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:03:28, skipping insertion in model container [2022-01-11 06:03:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:03:28" (4/4) ... [2022-01-11 06:03:28,067 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.cTransformedIcfg [2022-01-11 06:03:28,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:03:28,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:03:28,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:03:28,112 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 06:03:28,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:03:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-11 06:03:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 06:03:28,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:28,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:28,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash -813553221, now seen corresponding path program 1 times [2022-01-11 06:03:28,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:28,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578292535] [2022-01-11 06:03:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:28,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:28,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:28,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 06:03:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:03:28,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:28,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578292535] [2022-01-11 06:03:28,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578292535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:03:28,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:03:28,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-11 06:03:28,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737971070] [2022-01-11 06:03:28,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:03:28,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-11 06:03:28,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-11 06:03:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-01-11 06:03:28,605 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 06:03:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:29,140 INFO L93 Difference]: Finished difference Result 82 states and 111 transitions. [2022-01-11 06:03:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-11 06:03:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-11 06:03:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:29,150 INFO L225 Difference]: With dead ends: 82 [2022-01-11 06:03:29,150 INFO L226 Difference]: Without dead ends: 41 [2022-01-11 06:03:29,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-11 06:03:29,158 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:29,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 167 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:03:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-11 06:03:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-01-11 06:03:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-01-11 06:03:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-01-11 06:03:29,193 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 18 [2022-01-11 06:03:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:29,194 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-01-11 06:03:29,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 06:03:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-01-11 06:03:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 06:03:29,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:29,196 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:29,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:03:29,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:29,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1001164295, now seen corresponding path program 1 times [2022-01-11 06:03:29,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:29,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354134331] [2022-01-11 06:03:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:29,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:03:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:03:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:03:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 06:03:29,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354134331] [2022-01-11 06:03:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354134331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:03:29,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:03:29,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-11 06:03:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636680476] [2022-01-11 06:03:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:03:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-11 06:03:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-11 06:03:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-11 06:03:29,448 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-11 06:03:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:29,633 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-01-11 06:03:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:03:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-01-11 06:03:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:29,635 INFO L225 Difference]: With dead ends: 52 [2022-01-11 06:03:29,635 INFO L226 Difference]: Without dead ends: 41 [2022-01-11 06:03:29,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 06:03:29,636 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:29,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:03:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-11 06:03:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-01-11 06:03:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-11 06:03:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-11 06:03:29,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 28 [2022-01-11 06:03:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:29,643 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-11 06:03:29,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-11 06:03:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-11 06:03:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-11 06:03:29,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:29,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:29,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:03:29,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash 609952427, now seen corresponding path program 1 times [2022-01-11 06:03:29,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:29,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424465887] [2022-01-11 06:03:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:29,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 06:03:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:03:29,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:29,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424465887] [2022-01-11 06:03:29,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424465887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:29,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046494868] [2022-01-11 06:03:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:29,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:29,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:03:29,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:03:29,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 06:03:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:30,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:03:30,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:03:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:03:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:03:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:03:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046494868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:03:30,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:03:30,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-01-11 06:03:30,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148446545] [2022-01-11 06:03:30,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:03:30,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 06:03:30,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 06:03:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-01-11 06:03:30,795 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-11 06:03:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:31,109 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-01-11 06:03:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 06:03:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 31 [2022-01-11 06:03:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:31,112 INFO L225 Difference]: With dead ends: 50 [2022-01-11 06:03:31,113 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 06:03:31,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-11 06:03:31,115 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:31,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 188 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:03:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 06:03:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-11 06:03:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-11 06:03:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-11 06:03:31,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 31 [2022-01-11 06:03:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:31,136 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-11 06:03:31,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-11 06:03:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-11 06:03:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-11 06:03:31,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:31,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:31,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 06:03:31,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:31,360 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash -49604129, now seen corresponding path program 1 times [2022-01-11 06:03:31,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:31,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613702117] [2022-01-11 06:03:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:31,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:31,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:31,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:03:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:31,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:03:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:31,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:03:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 06:03:32,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:32,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613702117] [2022-01-11 06:03:32,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613702117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:32,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763738450] [2022-01-11 06:03:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:32,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:03:32,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:03:32,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 06:03:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-11 06:03:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:03:32,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-11 06:03:33,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:33,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:33,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:33,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:33,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:33,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:33,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 06:03:33,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 261 treesize of output 129 [2022-01-11 06:03:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 06:03:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:03:38,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763738450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:38,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 06:03:38,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2022-01-11 06:03:38,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631316400] [2022-01-11 06:03:38,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 06:03:38,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-11 06:03:38,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-11 06:03:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1153, Unknown=1, NotChecked=0, Total=1260 [2022-01-11 06:03:38,643 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-11 06:03:42,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-11 06:03:44,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-11 06:03:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:47,902 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2022-01-11 06:03:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-11 06:03:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 41 [2022-01-11 06:03:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:47,904 INFO L225 Difference]: With dead ends: 70 [2022-01-11 06:03:47,904 INFO L226 Difference]: Without dead ends: 68 [2022-01-11 06:03:47,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=314, Invalid=2990, Unknown=2, NotChecked=0, Total=3306 [2022-01-11 06:03:47,905 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:47,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 215 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 684 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-01-11 06:03:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-11 06:03:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2022-01-11 06:03:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-11 06:03:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2022-01-11 06:03:47,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2022-01-11 06:03:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:47,914 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2022-01-11 06:03:47,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-11 06:03:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2022-01-11 06:03:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-11 06:03:47,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:47,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:47,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 06:03:48,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-11 06:03:48,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:48,132 INFO L85 PathProgramCache]: Analyzing trace with hash -731924815, now seen corresponding path program 1 times [2022-01-11 06:03:48,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:48,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802795024] [2022-01-11 06:03:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:48,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:03:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:03:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:03:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 06:03:48,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802795024] [2022-01-11 06:03:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802795024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:03:48,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:03:48,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-11 06:03:48,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873848229] [2022-01-11 06:03:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:03:48,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 06:03:48,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 06:03:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-11 06:03:48,297 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-11 06:03:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:48,643 INFO L93 Difference]: Finished difference Result 98 states and 158 transitions. [2022-01-11 06:03:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:03:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-01-11 06:03:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:48,645 INFO L225 Difference]: With dead ends: 98 [2022-01-11 06:03:48,645 INFO L226 Difference]: Without dead ends: 62 [2022-01-11 06:03:48,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-11 06:03:48,646 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:48,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 150 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:03:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-11 06:03:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-01-11 06:03:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-11 06:03:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2022-01-11 06:03:48,654 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 42 [2022-01-11 06:03:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:48,655 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2022-01-11 06:03:48,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-11 06:03:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2022-01-11 06:03:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 06:03:48,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:48,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:48,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 06:03:48,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 7870447, now seen corresponding path program 1 times [2022-01-11 06:03:48,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:48,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154635956] [2022-01-11 06:03:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:48,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:48,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:03:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:03:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:03:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 06:03:49,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:49,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154635956] [2022-01-11 06:03:49,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154635956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:49,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127309126] [2022-01-11 06:03:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:49,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:03:49,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:03:49,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 06:03:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-11 06:03:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:03:49,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:03:49,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:03:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:50,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:03:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:50,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:03:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:51,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:51,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 16 [2022-01-11 06:03:51,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:51,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:51,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:51,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 06:03:51,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 19 [2022-01-11 06:03:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 06:03:51,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:03:52,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127309126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:52,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 06:03:52,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2022-01-11 06:03:52,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951117546] [2022-01-11 06:03:52,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 06:03:52,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-11 06:03:52,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-11 06:03:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 06:03:52,409 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-11 06:03:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:53,158 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2022-01-11 06:03:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-11 06:03:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 47 [2022-01-11 06:03:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:53,165 INFO L225 Difference]: With dead ends: 114 [2022-01-11 06:03:53,165 INFO L226 Difference]: Without dead ends: 100 [2022-01-11 06:03:53,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2022-01-11 06:03:53,166 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 74 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:53,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 465 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 557 Invalid, 0 Unknown, 164 Unchecked, 0.5s Time] [2022-01-11 06:03:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-11 06:03:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-01-11 06:03:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.208955223880597) internal successors, (81), 68 states have internal predecessors, (81), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (41), 20 states have call predecessors, (41), 12 states have call successors, (41) [2022-01-11 06:03:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2022-01-11 06:03:53,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 47 [2022-01-11 06:03:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:53,178 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2022-01-11 06:03:53,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-11 06:03:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2022-01-11 06:03:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 06:03:53,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:53,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:53,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 06:03:53,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:53,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 37423119, now seen corresponding path program 1 times [2022-01-11 06:03:53,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466937443] [2022-01-11 06:03:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:53,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:03:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:03:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:03:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 06:03:53,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466937443] [2022-01-11 06:03:53,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466937443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43452505] [2022-01-11 06:03:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:53,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:53,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:03:53,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:03:53,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 06:03:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:54,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-11 06:03:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:03:54,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:03:54,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:03:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:54,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:03:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:54,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:03:55,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:55,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:55,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-01-11 06:03:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:03:55,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:03:55,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 06:03:55,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 19 [2022-01-11 06:03:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 06:03:56,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:03:56,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43452505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:56,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 06:03:56,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2022-01-11 06:03:56,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823739447] [2022-01-11 06:03:56,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 06:03:56,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-11 06:03:56,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-11 06:03:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-01-11 06:03:56,442 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand has 31 states, 27 states have (on average 2.037037037037037) internal successors, (55), 20 states have internal predecessors, (55), 10 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-11 06:03:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:57,459 INFO L93 Difference]: Finished difference Result 135 states and 185 transitions. [2022-01-11 06:03:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-11 06:03:57,459 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.037037037037037) internal successors, (55), 20 states have internal predecessors, (55), 10 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 47 [2022-01-11 06:03:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:57,460 INFO L225 Difference]: With dead ends: 135 [2022-01-11 06:03:57,460 INFO L226 Difference]: Without dead ends: 113 [2022-01-11 06:03:57,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2022-01-11 06:03:57,462 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:57,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 375 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 490 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2022-01-11 06:03:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-11 06:03:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2022-01-11 06:03:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 74 states have internal predecessors, (89), 20 states have call successors, (20), 10 states have call predecessors, (20), 12 states have return successors, (46), 23 states have call predecessors, (46), 13 states have call successors, (46) [2022-01-11 06:03:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 155 transitions. [2022-01-11 06:03:57,475 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 155 transitions. Word has length 47 [2022-01-11 06:03:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:57,475 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 155 transitions. [2022-01-11 06:03:57,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.037037037037037) internal successors, (55), 20 states have internal predecessors, (55), 10 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-11 06:03:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 155 transitions. [2022-01-11 06:03:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-11 06:03:57,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:57,476 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:57,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 06:03:57,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:57,676 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1830923525, now seen corresponding path program 1 times [2022-01-11 06:03:57,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:57,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180315780] [2022-01-11 06:03:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:57,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:03:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:03:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:03:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:03:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:03:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-11 06:03:57,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:03:57,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180315780] [2022-01-11 06:03:57,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180315780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:03:57,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052037806] [2022-01-11 06:03:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:57,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:57,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:03:57,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:03:57,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 06:03:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:03:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:03:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:03:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-11 06:03:58,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:03:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-11 06:03:58,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052037806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:03:58,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:03:58,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 11] total 23 [2022-01-11 06:03:58,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365749133] [2022-01-11 06:03:58,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:03:58,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 06:03:58,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:03:58,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 06:03:58,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-11 06:03:58,588 INFO L87 Difference]: Start difference. First operand 108 states and 155 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-11 06:03:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:03:59,440 INFO L93 Difference]: Finished difference Result 221 states and 363 transitions. [2022-01-11 06:03:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-11 06:03:59,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 5 states have call successors, (13) Word has length 55 [2022-01-11 06:03:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:03:59,442 INFO L225 Difference]: With dead ends: 221 [2022-01-11 06:03:59,442 INFO L226 Difference]: Without dead ends: 142 [2022-01-11 06:03:59,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 06:03:59,443 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 06:03:59,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 231 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 06:03:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-11 06:03:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2022-01-11 06:03:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.205128205128205) internal successors, (94), 74 states have internal predecessors, (94), 20 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (43), 25 states have call predecessors, (43), 13 states have call successors, (43) [2022-01-11 06:03:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 157 transitions. [2022-01-11 06:03:59,457 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 157 transitions. Word has length 55 [2022-01-11 06:03:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:03:59,457 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 157 transitions. [2022-01-11 06:03:59,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-11 06:03:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 157 transitions. [2022-01-11 06:03:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-11 06:03:59,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:03:59,458 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:03:59,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 06:03:59,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:03:59,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:03:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:03:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2142701466, now seen corresponding path program 1 times [2022-01-11 06:03:59,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:03:59,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792961280] [2022-01-11 06:03:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:03:59,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:03:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:00,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:00,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:00,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:00,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:04:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:01,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:04:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:04:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-11 06:04:01,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:04:01,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792961280] [2022-01-11 06:04:01,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792961280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:01,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298539752] [2022-01-11 06:04:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:04:01,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:01,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:04:01,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:04:01,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 06:04:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:02,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-11 06:04:02,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:04:02,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:04:02,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:04:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:02,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:04:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:02,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:04:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:04:03,790 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-11 06:04:03,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 42 [2022-01-11 06:04:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:03,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:04:03,799 INFO L353 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-01-11 06:04:03,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 1 [2022-01-11 06:04:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 06:04:03,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:04:04,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298539752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:04,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 06:04:04,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2022-01-11 06:04:04,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689495443] [2022-01-11 06:04:04,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 06:04:04,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-11 06:04:04,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:04:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-11 06:04:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1776, Unknown=0, NotChecked=0, Total=1892 [2022-01-11 06:04:04,397 INFO L87 Difference]: Start difference. First operand 110 states and 157 transitions. Second operand has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 13 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2022-01-11 06:04:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:04:08,461 INFO L93 Difference]: Finished difference Result 226 states and 368 transitions. [2022-01-11 06:04:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-11 06:04:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 13 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) Word has length 56 [2022-01-11 06:04:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:04:08,463 INFO L225 Difference]: With dead ends: 226 [2022-01-11 06:04:08,464 INFO L226 Difference]: Without dead ends: 214 [2022-01-11 06:04:08,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=468, Invalid=6672, Unknown=0, NotChecked=0, Total=7140 [2022-01-11 06:04:08,465 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 06:04:08,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 374 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 918 Invalid, 0 Unknown, 380 Unchecked, 0.9s Time] [2022-01-11 06:04:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-11 06:04:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 167. [2022-01-11 06:04:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 122 states have (on average 1.278688524590164) internal successors, (156), 114 states have internal predecessors, (156), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (90), 41 states have call predecessors, (90), 18 states have call successors, (90) [2022-01-11 06:04:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 271 transitions. [2022-01-11 06:04:08,484 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 271 transitions. Word has length 56 [2022-01-11 06:04:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:04:08,484 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 271 transitions. [2022-01-11 06:04:08,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 13 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2022-01-11 06:04:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 271 transitions. [2022-01-11 06:04:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-11 06:04:08,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:04:08,485 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:04:08,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 06:04:08,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:08,696 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:04:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:04:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -197665093, now seen corresponding path program 2 times [2022-01-11 06:04:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:04:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907584857] [2022-01-11 06:04:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:04:08,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:04:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 06:04:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:04:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 06:04:09,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:04:09,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907584857] [2022-01-11 06:04:09,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907584857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:09,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563017220] [2022-01-11 06:04:09,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:04:09,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:04:09,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:04:09,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 06:04:11,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:04:11,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:04:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 98 conjunts are in the unsatisfiable core [2022-01-11 06:04:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:04:11,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-11 06:04:11,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:04:11,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:04:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:11,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-01-11 06:04:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:11,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-01-11 06:04:11,734 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-11 06:04:11,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-11 06:04:11,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:11,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:04:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 06:04:11,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-11 06:04:12,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-11 06:04:12,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-11 06:04:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 06:04:12,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:04:13,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563017220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:13,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 06:04:13,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 45 [2022-01-11 06:04:13,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255816800] [2022-01-11 06:04:13,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 06:04:13,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-11 06:04:13,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:04:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-11 06:04:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2490, Unknown=0, NotChecked=0, Total=2652 [2022-01-11 06:04:13,520 INFO L87 Difference]: Start difference. First operand 167 states and 271 transitions. Second operand has 45 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-11 06:04:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:04:15,821 INFO L93 Difference]: Finished difference Result 371 states and 664 transitions. [2022-01-11 06:04:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-11 06:04:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) Word has length 57 [2022-01-11 06:04:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:04:15,824 INFO L225 Difference]: With dead ends: 371 [2022-01-11 06:04:15,824 INFO L226 Difference]: Without dead ends: 303 [2022-01-11 06:04:15,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=601, Invalid=6538, Unknown=1, NotChecked=0, Total=7140 [2022-01-11 06:04:15,827 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 302 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 06:04:15,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 507 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 702 Invalid, 0 Unknown, 321 Unchecked, 0.6s Time] [2022-01-11 06:04:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-11 06:04:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2022-01-11 06:04:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 166 states have internal predecessors, (223), 39 states have call successors, (39), 16 states have call predecessors, (39), 28 states have return successors, (142), 62 states have call predecessors, (142), 30 states have call successors, (142) [2022-01-11 06:04:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 404 transitions. [2022-01-11 06:04:15,852 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 404 transitions. Word has length 57 [2022-01-11 06:04:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:04:15,852 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 404 transitions. [2022-01-11 06:04:15,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-11 06:04:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 404 transitions. [2022-01-11 06:04:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-11 06:04:15,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:04:15,854 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:04:15,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 06:04:16,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:16,060 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:04:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:04:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash -168112421, now seen corresponding path program 2 times [2022-01-11 06:04:16,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:04:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384682138] [2022-01-11 06:04:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:04:16,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:04:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 06:04:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:04:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-11 06:04:16,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:04:16,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384682138] [2022-01-11 06:04:16,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384682138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219215834] [2022-01-11 06:04:16,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:04:16,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:04:16,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:04:16,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 06:04:17,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:04:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:04:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-11 06:04:17,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:04:18,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:04:18,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 06:04:18,426 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-11 06:04:18,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2022-01-11 06:04:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 06:04:18,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:04:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 06:04:19,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219215834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:04:19,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:04:19,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 43 [2022-01-11 06:04:19,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702296658] [2022-01-11 06:04:19,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:04:19,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-11 06:04:19,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:04:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-11 06:04:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2022-01-11 06:04:19,285 INFO L87 Difference]: Start difference. First operand 245 states and 404 transitions. Second operand has 43 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (21), 18 states have call predecessors, (21), 14 states have call successors, (21) [2022-01-11 06:04:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:04:21,765 INFO L93 Difference]: Finished difference Result 448 states and 814 transitions. [2022-01-11 06:04:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-11 06:04:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (21), 18 states have call predecessors, (21), 14 states have call successors, (21) Word has length 57 [2022-01-11 06:04:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:04:21,768 INFO L225 Difference]: With dead ends: 448 [2022-01-11 06:04:21,768 INFO L226 Difference]: Without dead ends: 398 [2022-01-11 06:04:21,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=388, Invalid=5464, Unknown=0, NotChecked=0, Total=5852 [2022-01-11 06:04:21,770 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 06:04:21,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 738 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1292 Invalid, 0 Unknown, 312 Unchecked, 0.9s Time] [2022-01-11 06:04:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-11 06:04:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 301. [2022-01-11 06:04:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 218 states have (on average 1.2660550458715596) internal successors, (276), 209 states have internal predecessors, (276), 42 states have call successors, (42), 17 states have call predecessors, (42), 40 states have return successors, (206), 74 states have call predecessors, (206), 33 states have call successors, (206) [2022-01-11 06:04:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 524 transitions. [2022-01-11 06:04:21,813 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 524 transitions. Word has length 57 [2022-01-11 06:04:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:04:21,813 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 524 transitions. [2022-01-11 06:04:21,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (21), 18 states have call predecessors, (21), 14 states have call successors, (21) [2022-01-11 06:04:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 524 transitions. [2022-01-11 06:04:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-11 06:04:21,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:04:21,815 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:04:21,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-11 06:04:22,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-11 06:04:22,024 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:04:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:04:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1997188195, now seen corresponding path program 3 times [2022-01-11 06:04:22,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:04:22,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836732676] [2022-01-11 06:04:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:04:22,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:04:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-11 06:04:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 06:04:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:04:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 06:04:22,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:04:22,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836732676] [2022-01-11 06:04:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836732676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:22,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183766857] [2022-01-11 06:04:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:04:22,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:22,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:04:22,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:04:22,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-11 06:04:23,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-11 06:04:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:04:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-11 06:04:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:04:23,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 06:04:23,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-01-11 06:04:24,531 INFO L353 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-01-11 06:04:24,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2022-01-11 06:04:24,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-11 06:04:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 06:04:24,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:04:24,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-11 06:04:25,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-11 06:04:27,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183766857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:27,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 06:04:27,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-01-11 06:04:27,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45896464] [2022-01-11 06:04:27,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 06:04:27,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-11 06:04:27,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:04:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-11 06:04:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1839, Unknown=3, NotChecked=0, Total=1980 [2022-01-11 06:04:27,332 INFO L87 Difference]: Start difference. First operand 301 states and 524 transitions. Second operand has 34 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 15 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-11 06:04:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:04:29,157 INFO L93 Difference]: Finished difference Result 480 states and 906 transitions. [2022-01-11 06:04:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-11 06:04:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 15 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) Word has length 57 [2022-01-11 06:04:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:04:29,161 INFO L225 Difference]: With dead ends: 480 [2022-01-11 06:04:29,161 INFO L226 Difference]: Without dead ends: 459 [2022-01-11 06:04:29,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=374, Invalid=4315, Unknown=3, NotChecked=0, Total=4692 [2022-01-11 06:04:29,163 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 70 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 06:04:29,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 600 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 864 Invalid, 0 Unknown, 232 Unchecked, 0.6s Time] [2022-01-11 06:04:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-11 06:04:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 354. [2022-01-11 06:04:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 257 states have (on average 1.2762645914396886) internal successors, (328), 248 states have internal predecessors, (328), 47 states have call successors, (47), 19 states have call predecessors, (47), 49 states have return successors, (248), 86 states have call predecessors, (248), 38 states have call successors, (248) [2022-01-11 06:04:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 623 transitions. [2022-01-11 06:04:29,201 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 623 transitions. Word has length 57 [2022-01-11 06:04:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:04:29,201 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 623 transitions. [2022-01-11 06:04:29,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 15 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-11 06:04:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 623 transitions. [2022-01-11 06:04:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-11 06:04:29,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:04:29,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:04:29,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-11 06:04:29,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:29,410 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:04:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:04:29,410 INFO L85 PathProgramCache]: Analyzing trace with hash -911378934, now seen corresponding path program 1 times [2022-01-11 06:04:29,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:04:29,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388612828] [2022-01-11 06:04:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:04:29,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:04:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:29,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-11 06:04:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-11 06:04:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:29,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 06:04:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:30,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:04:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 06:04:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-11 06:04:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 06:04:30,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:04:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388612828] [2022-01-11 06:04:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388612828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:04:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551065923] [2022-01-11 06:04:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:04:30,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:04:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:04:30,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:04:30,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-11 06:04:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:04:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-11 06:04:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates...