/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:25:06,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:25:06,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:25:06,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:25:06,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:25:06,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:25:06,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:25:06,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:25:06,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:25:06,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:25:06,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:25:06,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:25:06,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:25:06,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:25:06,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:25:06,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:25:06,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:25:06,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:25:06,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:25:06,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:25:06,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:25:06,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:25:06,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:25:06,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:25:06,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:25:06,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:25:06,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:25:06,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:25:06,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:25:06,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:25:06,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:25:06,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:25:06,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:25:06,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:25:06,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:25:06,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:25:06,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:25:06,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:25:06,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:25:06,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:25:06,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:25:06,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:25:06,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:25:06,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:25:06,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:25:06,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:25:06,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:25:06,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:25:06,574 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:25:06,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:25:06,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:25:06,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:25:06,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:25:06,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:25:06,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:25:06,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:25:06,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:25:06,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:25:06,577 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:25:06,577 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:25:06,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:25:06,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:25:06,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:25:06,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:25:06,791 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:25:06,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2022-01-10 18:25:06,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8091ff7/a47d677c69a74dfe9e5f2d4dae36b391/FLAG67ae427eb [2022-01-10 18:25:07,154 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:25:07,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2022-01-10 18:25:07,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8091ff7/a47d677c69a74dfe9e5f2d4dae36b391/FLAG67ae427eb [2022-01-10 18:25:07,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8091ff7/a47d677c69a74dfe9e5f2d4dae36b391 [2022-01-10 18:25:07,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:25:07,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:25:07,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:25:07,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:25:07,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:25:07,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33cf53ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07, skipping insertion in model container [2022-01-10 18:25:07,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:25:07,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:25:07,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c[481,494] [2022-01-10 18:25:07,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:25:07,727 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:25:07,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c[481,494] [2022-01-10 18:25:07,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:25:07,743 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:25:07,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07 WrapperNode [2022-01-10 18:25:07,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:25:07,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:25:07,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:25:07,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:25:07,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,761 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-01-10 18:25:07,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:25:07,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:25:07,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:25:07,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:25:07,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:25:07,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:25:07,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:25:07,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:25:07,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:07,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:25:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:25:07,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:25:07,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:25:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:25:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:25:07,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:25:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:25:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-10 18:25:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-10 18:25:07,871 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:25:07,872 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:25:07,930 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:25:07,933 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:25:07,934 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:25:07,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:07 BoogieIcfgContainer [2022-01-10 18:25:07,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:25:07,935 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:25:07,936 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:25:07,936 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:25:07,938 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:07" (1/1) ... [2022-01-10 18:25:08,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:08 BasicIcfg [2022-01-10 18:25:08,015 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:25:08,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:25:08,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:25:08,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:25:08,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:25:07" (1/4) ... [2022-01-10 18:25:08,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ef3abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:08, skipping insertion in model container [2022-01-10 18:25:08,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:07" (2/4) ... [2022-01-10 18:25:08,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ef3abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:08, skipping insertion in model container [2022-01-10 18:25:08,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:07" (3/4) ... [2022-01-10 18:25:08,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ef3abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:25:08, skipping insertion in model container [2022-01-10 18:25:08,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:08" (4/4) ... [2022-01-10 18:25:08,020 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.cTransformedIcfg [2022-01-10 18:25:08,025 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:25:08,025 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:25:08,071 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:25:08,077 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:25:08,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:25:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 18:25:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:25:08,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:08,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:25:08,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times [2022-01-10 18:25:08,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:08,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110409928] [2022-01-10 18:25:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:08,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:25:08,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110409928] [2022-01-10 18:25:08,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110409928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:25:08,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:25:08,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:25:08,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320207510] [2022-01-10 18:25:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:25:08,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:25:08,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:25:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:25:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:25:08,357 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:25:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:25:08,406 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 18:25:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:25:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:25:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:25:08,413 INFO L225 Difference]: With dead ends: 25 [2022-01-10 18:25:08,413 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 18:25:08,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:25:08,417 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:25:08,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:25:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 18:25:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 18:25:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:25:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 18:25:08,440 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 18:25:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:25:08,440 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 18:25:08,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:25:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 18:25:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 18:25:08,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:08,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:25:08,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:25:08,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times [2022-01-10 18:25:08,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:08,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301992968] [2022-01-10 18:25:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:08,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:08,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:08,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:25:08,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301992968] [2022-01-10 18:25:08,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301992968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:25:08,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702256744] [2022-01-10 18:25:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:08,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:25:08,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:25:08,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:25:08,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:25:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:08,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 18:25:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:25:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 18:25:08,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:25:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:25:09,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702256744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:25:09,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:25:09,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 18:25:09,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005108686] [2022-01-10 18:25:09,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:25:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 18:25:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:25:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 18:25:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 18:25:09,386 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 18:25:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:25:09,485 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 18:25:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 18:25:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2022-01-10 18:25:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:25:09,486 INFO L225 Difference]: With dead ends: 22 [2022-01-10 18:25:09,487 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 18:25:09,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:25:09,488 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:25:09,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:25:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 18:25:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 18:25:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 18:25:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 18:25:09,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 18:25:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:25:09,492 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 18:25:09,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 18:25:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 18:25:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:25:09,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:09,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:25:09,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:25:09,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:25:09,694 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times [2022-01-10 18:25:09,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666763413] [2022-01-10 18:25:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:09,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:09,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:09,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:09,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:25:09,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666763413] [2022-01-10 18:25:09,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666763413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:25:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433426451] [2022-01-10 18:25:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:25:09,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:25:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:25:09,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:25:09,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:25:10,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:25:10,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:25:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 18:25:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:25:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:25:10,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:25:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:25:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433426451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:25:15,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:25:15,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-10 18:25:15,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256293416] [2022-01-10 18:25:15,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:25:15,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 18:25:15,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:25:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 18:25:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-10 18:25:15,089 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 23 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 18:25:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:25:15,991 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 18:25:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:25:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 23 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-10 18:25:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:25:15,992 INFO L225 Difference]: With dead ends: 25 [2022-01-10 18:25:15,992 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 18:25:15,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-01-10 18:25:15,993 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:25:15,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 72 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:25:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 18:25:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 18:25:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 18:25:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 18:25:15,996 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 18:25:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:25:15,997 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 18:25:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 23 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 18:25:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 18:25:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 18:25:15,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:15,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:25:16,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:25:16,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 18:25:16,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times [2022-01-10 18:25:16,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970208573] [2022-01-10 18:25:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:16,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:16,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:16,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:16,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:25:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 18:25:16,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970208573] [2022-01-10 18:25:16,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970208573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:25:16,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391475122] [2022-01-10 18:25:16,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:25:16,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:25:16,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:25:16,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:25:16,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:25:16,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 18:25:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:25:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 18:25:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:25:23,259 WARN L228 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 3506 DAG size of output: 1222 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)