/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:56:57,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:56:57,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:56:57,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:56:57,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:56:57,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:56:57,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:56:57,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:56:57,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:56:57,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:56:57,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:56:57,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:56:57,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:56:57,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:56:57,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:56:57,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:56:57,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:56:57,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:56:57,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:56:57,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:56:57,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:56:57,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:56:57,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:56:57,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:56:57,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:56:57,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:56:57,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:56:57,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:56:57,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:56:57,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:56:57,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:56:57,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:56:57,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:56:57,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:56:57,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:56:57,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:56:57,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:56:57,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:56:57,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:56:57,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:56:57,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:56:57,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:56:57,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:56:57,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:56:57,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:56:57,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:56:57,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:56:57,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:56:57,358 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:56:57,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:56:57,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:56:57,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:56:57,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:56:57,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:56:57,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:56:57,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:56:57,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:56:57,362 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:56:57,362 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:56:57,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:56:57,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:56:57,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:56:57,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:56:57,565 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:56:57,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2022-01-11 05:56:57,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd452d2dc/db1ffbc2d1e34970be8fc525a7baed67/FLAGadbaa22d6 [2022-01-11 05:56:57,907 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:56:57,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2022-01-11 05:56:57,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd452d2dc/db1ffbc2d1e34970be8fc525a7baed67/FLAGadbaa22d6 [2022-01-11 05:56:58,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd452d2dc/db1ffbc2d1e34970be8fc525a7baed67 [2022-01-11 05:56:58,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:56:58,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:56:58,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:56:58,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:56:58,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:56:58,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd54d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58, skipping insertion in model container [2022-01-11 05:56:58,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:56:58,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:56:58,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c[1168,1181] [2022-01-11 05:56:58,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:56:58,538 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:56:58,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c[1168,1181] [2022-01-11 05:56:58,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:56:58,567 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:56:58,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58 WrapperNode [2022-01-11 05:56:58,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:56:58,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:56:58,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:56:58,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:56:58,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,593 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-11 05:56:58,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:56:58,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:56:58,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:56:58,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:56:58,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:56:58,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:56:58,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:56:58,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:56:58,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:56:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:56:58,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:56:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:56:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:56:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:56:58,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:56:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:56:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-11 05:56:58,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-11 05:56:58,732 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:56:58,733 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:56:58,820 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:56:58,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:56:58,824 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:56:58,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:56:58 BoogieIcfgContainer [2022-01-11 05:56:58,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:56:58,826 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:56:58,826 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:56:58,834 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:56:58,839 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:56:58" (1/1) ... [2022-01-11 05:56:58,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:56:58 BasicIcfg [2022-01-11 05:56:58,913 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:56:58,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:56:58,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:56:58,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:56:58,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:56:58" (1/4) ... [2022-01-11 05:56:58,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b2f804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:56:58, skipping insertion in model container [2022-01-11 05:56:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:56:58" (2/4) ... [2022-01-11 05:56:58,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b2f804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:56:58, skipping insertion in model container [2022-01-11 05:56:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:56:58" (3/4) ... [2022-01-11 05:56:58,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b2f804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:56:58, skipping insertion in model container [2022-01-11 05:56:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:56:58" (4/4) ... [2022-01-11 05:56:58,927 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.cTransformedIcfg [2022-01-11 05:56:58,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:56:58,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:56:58,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:56:58,967 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:56:58,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:56:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-11 05:56:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 05:56:58,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:56:58,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:56:58,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:56:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:56:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1248781538, now seen corresponding path program 1 times [2022-01-11 05:56:58,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:56:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716169950] [2022-01-11 05:56:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:56:58,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:56:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:56:59,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:56:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:56:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:56:59,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:56:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716169950] [2022-01-11 05:56:59,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716169950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:56:59,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:56:59,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:56:59,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046663751] [2022-01-11 05:56:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:56:59,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:56:59,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:56:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:56:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:56:59,241 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:56:59,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:56:59,326 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-01-11 05:56:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:56:59,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-11 05:56:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:56:59,333 INFO L225 Difference]: With dead ends: 36 [2022-01-11 05:56:59,333 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 05:56:59,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:56:59,339 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:56:59,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:56:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 05:56:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-11 05:56:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-11 05:56:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-01-11 05:56:59,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2022-01-11 05:56:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:56:59,377 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-01-11 05:56:59,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:56:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-01-11 05:56:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-11 05:56:59,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:56:59,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:56:59,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:56:59,382 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:56:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:56:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1675309908, now seen corresponding path program 1 times [2022-01-11 05:56:59,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:56:59,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981082135] [2022-01-11 05:56:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:56:59,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:56:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:56:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:56:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:56:59,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:56:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:56:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:56:59,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:56:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981082135] [2022-01-11 05:56:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981082135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:56:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722797908] [2022-01-11 05:56:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:56:59,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:56:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:56:59,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:56:59,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:56:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:56:59,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-11 05:56:59,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:56:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:56:59,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:56:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:56:59,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722797908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:56:59,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:56:59,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-11 05:56:59,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265426480] [2022-01-11 05:56:59,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:56:59,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 05:56:59,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:56:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 05:56:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:56:59,817 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-11 05:56:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:56:59,912 INFO L93 Difference]: Finished difference Result 59 states and 109 transitions. [2022-01-11 05:56:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 05:56:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2022-01-11 05:56:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:56:59,921 INFO L225 Difference]: With dead ends: 59 [2022-01-11 05:56:59,921 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 05:56:59,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-11 05:56:59,922 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:56:59,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:56:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 05:56:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-11 05:56:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 8 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2022-01-11 05:56:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 62 transitions. [2022-01-11 05:56:59,931 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 62 transitions. Word has length 19 [2022-01-11 05:56:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:56:59,931 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 62 transitions. [2022-01-11 05:56:59,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-11 05:56:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 62 transitions. [2022-01-11 05:56:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-11 05:56:59,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:56:59,933 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:56:59,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 05:57:00,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:00,136 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash -293896410, now seen corresponding path program 1 times [2022-01-11 05:57:00,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:00,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959669269] [2022-01-11 05:57:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:00,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:57:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 05:57:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-11 05:57:00,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:00,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959669269] [2022-01-11 05:57:00,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959669269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:00,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349088000] [2022-01-11 05:57:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:00,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:00,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:00,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:57:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-11 05:57:00,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-11 05:57:00,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-11 05:57:01,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349088000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:01,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:01,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 16 [2022-01-11 05:57:01,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298797080] [2022-01-11 05:57:01,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:01,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-11 05:57:01,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-11 05:57:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-11 05:57:01,091 INFO L87 Difference]: Start difference. First operand 37 states and 62 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2022-01-11 05:57:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:01,277 INFO L93 Difference]: Finished difference Result 100 states and 241 transitions. [2022-01-11 05:57:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:57:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) Word has length 43 [2022-01-11 05:57:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:01,280 INFO L225 Difference]: With dead ends: 100 [2022-01-11 05:57:01,280 INFO L226 Difference]: Without dead ends: 66 [2022-01-11 05:57:01,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-01-11 05:57:01,282 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:01,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 115 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-11 05:57:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-01-11 05:57:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (41), 18 states have call predecessors, (41), 13 states have call successors, (41) [2022-01-11 05:57:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2022-01-11 05:57:01,295 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 43 [2022-01-11 05:57:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:01,295 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2022-01-11 05:57:01,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2022-01-11 05:57:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2022-01-11 05:57:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-11 05:57:01,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:01,298 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:01,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:57:01,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-11 05:57:01,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2419939, now seen corresponding path program 2 times [2022-01-11 05:57:01,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:01,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079584810] [2022-01-11 05:57:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:01,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:57:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-11 05:57:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 96 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-11 05:57:01,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079584810] [2022-01-11 05:57:01,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079584810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:01,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559419264] [2022-01-11 05:57:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:57:01,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:01,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:01,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:57:01,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:57:01,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:01,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-11 05:57:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 97 proven. 19 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-11 05:57:02,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 102 proven. 14 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-11 05:57:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559419264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:02,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-11 05:57:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389657891] [2022-01-11 05:57:02,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:02,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 05:57:02,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 05:57:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-11 05:57:02,532 INFO L87 Difference]: Start difference. First operand 60 states and 97 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (18), 13 states have call predecessors, (18), 6 states have call successors, (18) [2022-01-11 05:57:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:03,364 INFO L93 Difference]: Finished difference Result 331 states and 997 transitions. [2022-01-11 05:57:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-11 05:57:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (18), 13 states have call predecessors, (18), 6 states have call successors, (18) Word has length 76 [2022-01-11 05:57:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:03,372 INFO L225 Difference]: With dead ends: 331 [2022-01-11 05:57:03,372 INFO L226 Difference]: Without dead ends: 276 [2022-01-11 05:57:03,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=723, Invalid=2817, Unknown=0, NotChecked=0, Total=3540 [2022-01-11 05:57:03,377 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:03,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 138 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 05:57:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-11 05:57:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 133. [2022-01-11 05:57:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 81 states have internal predecessors, (85), 22 states have call successors, (22), 4 states have call predecessors, (22), 31 states have return successors, (210), 47 states have call predecessors, (210), 22 states have call successors, (210) [2022-01-11 05:57:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 317 transitions. [2022-01-11 05:57:03,440 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 317 transitions. Word has length 76 [2022-01-11 05:57:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:03,440 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 317 transitions. [2022-01-11 05:57:03,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (18), 13 states have call predecessors, (18), 6 states have call successors, (18) [2022-01-11 05:57:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 317 transitions. [2022-01-11 05:57:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-11 05:57:03,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:03,447 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:03,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 05:57:03,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:03,648 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1305137867, now seen corresponding path program 3 times [2022-01-11 05:57:03,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:03,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542282534] [2022-01-11 05:57:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:03,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:57:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 05:57:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-11 05:57:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 05:57:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 201 proven. 190 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2022-01-11 05:57:04,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:04,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542282534] [2022-01-11 05:57:04,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542282534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:04,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441611311] [2022-01-11 05:57:04,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:57:04,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:04,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:04,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:04,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:57:04,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-11 05:57:04,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:04,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-11 05:57:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 271 proven. 23 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2022-01-11 05:57:07,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 270 proven. 30 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2022-01-11 05:57:08,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441611311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:08,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:08,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 8] total 28 [2022-01-11 05:57:08,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594083869] [2022-01-11 05:57:08,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:08,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 05:57:08,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 05:57:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=671, Unknown=1, NotChecked=0, Total=756 [2022-01-11 05:57:08,249 INFO L87 Difference]: Start difference. First operand 133 states and 317 transitions. Second operand has 28 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 15 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (26), 15 states have call predecessors, (26), 15 states have call successors, (26) [2022-01-11 05:57:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:26,628 INFO L93 Difference]: Finished difference Result 796 states and 5068 transitions. [2022-01-11 05:57:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-11 05:57:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 15 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (26), 15 states have call predecessors, (26), 15 states have call successors, (26) Word has length 131 [2022-01-11 05:57:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:26,666 INFO L225 Difference]: With dead ends: 796 [2022-01-11 05:57:26,666 INFO L226 Difference]: Without dead ends: 668 [2022-01-11 05:57:26,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 288 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=757, Invalid=4791, Unknown=2, NotChecked=0, Total=5550 [2022-01-11 05:57:26,677 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:26,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 411 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1612 Invalid, 0 Unknown, 298 Unchecked, 1.6s Time] [2022-01-11 05:57:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-11 05:57:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 495. [2022-01-11 05:57:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 292 states have internal predecessors, (299), 73 states have call successors, (73), 8 states have call predecessors, (73), 132 states have return successors, (2765), 194 states have call predecessors, (2765), 73 states have call successors, (2765) [2022-01-11 05:57:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 3137 transitions. [2022-01-11 05:57:26,839 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 3137 transitions. Word has length 131 [2022-01-11 05:57:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:26,840 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 3137 transitions. [2022-01-11 05:57:26,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 15 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (26), 15 states have call predecessors, (26), 15 states have call successors, (26) [2022-01-11 05:57:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 3137 transitions. [2022-01-11 05:57:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-11 05:57:26,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:26,849 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:26,868 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 05:57:27,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:27,066 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1575594763, now seen corresponding path program 4 times [2022-01-11 05:57:27,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:27,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636585958] [2022-01-11 05:57:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:27,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:57:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-11 05:57:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 118 proven. 178 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-01-11 05:57:27,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636585958] [2022-01-11 05:57:27,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636585958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098662047] [2022-01-11 05:57:27,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 05:57:27,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:27,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:27,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:27,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 05:57:27,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 05:57:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:27,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-11 05:57:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 298 proven. 15 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-01-11 05:57:28,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 181 proven. 50 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-01-11 05:57:28,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098662047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:28,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:28,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 9] total 24 [2022-01-11 05:57:28,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676825334] [2022-01-11 05:57:28,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:28,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 05:57:28,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 05:57:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-01-11 05:57:28,753 INFO L87 Difference]: Start difference. First operand 495 states and 3137 transitions. Second operand has 24 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 11 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-01-11 05:57:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:30,392 INFO L93 Difference]: Finished difference Result 681 states and 5926 transitions. [2022-01-11 05:57:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-11 05:57:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 11 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) Word has length 107 [2022-01-11 05:57:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:30,398 INFO L225 Difference]: With dead ends: 681 [2022-01-11 05:57:30,398 INFO L226 Difference]: Without dead ends: 191 [2022-01-11 05:57:30,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=504, Invalid=2046, Unknown=0, NotChecked=0, Total=2550 [2022-01-11 05:57:30,415 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:30,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 248 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-11 05:57:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-11 05:57:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 164. [2022-01-11 05:57:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 30 states have call successors, (30), 7 states have call predecessors, (30), 37 states have return successors, (618), 60 states have call predecessors, (618), 30 states have call successors, (618) [2022-01-11 05:57:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 748 transitions. [2022-01-11 05:57:30,443 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 748 transitions. Word has length 107 [2022-01-11 05:57:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:30,444 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 748 transitions. [2022-01-11 05:57:30,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 11 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-01-11 05:57:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 748 transitions. [2022-01-11 05:57:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-11 05:57:30,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:30,446 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 17, 11, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:30,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-11 05:57:30,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:30,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1998865268, now seen corresponding path program 5 times [2022-01-11 05:57:30,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578576188] [2022-01-11 05:57:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:30,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:30,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:57:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:30,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 05:57:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-11 05:57:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-11 05:57:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-11 05:57:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-11 05:57:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 273 proven. 426 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2022-01-11 05:57:31,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:31,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578576188] [2022-01-11 05:57:31,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578576188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:31,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607416496] [2022-01-11 05:57:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 05:57:31,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:31,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:31,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:31,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 05:57:31,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-11 05:57:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-11 05:57:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates...