/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_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive/Addition03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:29:21,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:29:21,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:29:21,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:29:21,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:29:21,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:29:21,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:29:21,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:29:21,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:29:21,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:29:21,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:29:21,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:29:21,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:29:21,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:29:21,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:29:21,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:29:21,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:29:21,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:29:21,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:29:21,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:29:21,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:29:21,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:29:21,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:29:21,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:29:21,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:29:21,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:29:21,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:29:21,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:29:21,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:29:21,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:29:21,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:29:21,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:29:21,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:29:21,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:29:21,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:29:21,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:29:21,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:29:21,997 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:29:21,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:29:21,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:29:21,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:29:21,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:29:21,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:29:21,999 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:29:22,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:29:22,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:29:22,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:29:22,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:29:22,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:29:22,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:29:22,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:29:22,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:29:22,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:29:22,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:29:22,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:29:22,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:29:22,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:29:22,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:29:22,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:29:22,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:29:22,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:29:22,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:29:22,005 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:29:22,006 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:29:22,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:29:22,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:29:22,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:29:22,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:29:22,221 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:29:22,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition03-1.c [2022-01-10 12:29:22,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e6c8ce6/0bbae755c60c4d0f9e316a5a4375d5bb/FLAG7c00e9705 [2022-01-10 12:29:22,674 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:29:22,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition03-1.c [2022-01-10 12:29:22,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e6c8ce6/0bbae755c60c4d0f9e316a5a4375d5bb/FLAG7c00e9705 [2022-01-10 12:29:22,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e6c8ce6/0bbae755c60c4d0f9e316a5a4375d5bb [2022-01-10 12:29:22,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:29:22,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:29:22,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:29:22,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:29:22,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:29:22,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11968e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22, skipping insertion in model container [2022-01-10 12:29:22,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:29:22,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:29:22,909 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/Addition03-1.c[840,853] [2022-01-10 12:29:22,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:29:22,920 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:29:22,936 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/Addition03-1.c[840,853] [2022-01-10 12:29:22,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:29:22,949 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:29:22,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22 WrapperNode [2022-01-10 12:29:22,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:29:22,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:29:22,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:29:22,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:29:22,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,976 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-01-10 12:29:22,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:29:22,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:29:22,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:29:22,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:29:22,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:22,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:23,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:23,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:23,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:23,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:29:23,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:29:23,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:29:23,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:29:23,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (1/1) ... [2022-01-10 12:29:23,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:29:23,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:23,036 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 12:29:23,063 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 12:29:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:29:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:29:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:29:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:29:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2022-01-10 12:29:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2022-01-10 12:29:23,137 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:29:23,139 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:29:23,265 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:29:23,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:29:23,275 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:29:23,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:29:23 BoogieIcfgContainer [2022-01-10 12:29:23,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:29:23,283 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:29:23,284 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:29:23,285 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:29:23,289 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:29:23" (1/1) ... [2022-01-10 12:29:23,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:29:23 BasicIcfg [2022-01-10 12:29:23,402 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:29:23,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:29:23,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:29:23,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:29:23,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:29:22" (1/4) ... [2022-01-10 12:29:23,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d98d3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:29:23, skipping insertion in model container [2022-01-10 12:29:23,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:22" (2/4) ... [2022-01-10 12:29:23,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d98d3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:29:23, skipping insertion in model container [2022-01-10 12:29:23,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:29:23" (3/4) ... [2022-01-10 12:29:23,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d98d3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:29:23, skipping insertion in model container [2022-01-10 12:29:23,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:29:23" (4/4) ... [2022-01-10 12:29:23,409 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition03-1.cTransformedIcfg [2022-01-10 12:29:23,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:29:23,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:29:23,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:29:23,455 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 12:29:23,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:29:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:29:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:29:23,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:23,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:23,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash -184216550, now seen corresponding path program 1 times [2022-01-10 12:29:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084431853] [2022-01-10 12:29:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:23,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:23,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:23,892 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 12:29:23,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084431853] [2022-01-10 12:29:23,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084431853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:29:23,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:29:23,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:29:23,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298744672] [2022-01-10 12:29:23,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:29:23,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:29:23,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:29:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:29:23,931 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) 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 12:29:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:24,063 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-01-10 12:29:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:29:24,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 12:29:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:24,073 INFO L225 Difference]: With dead ends: 32 [2022-01-10 12:29:24,073 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 12:29:24,079 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 12:29:24,083 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:24,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 12:29:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 12:29:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:29:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-01-10 12:29:24,118 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-01-10 12:29:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:24,119 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-01-10 12:29:24,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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 12:29:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-01-10 12:29:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 12:29:24,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:24,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:24,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:29:24,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1821328523, now seen corresponding path program 1 times [2022-01-10 12:29:24,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:24,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620866596] [2022-01-10 12:29:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:24,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:24,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:24,304 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 12:29:24,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:24,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620866596] [2022-01-10 12:29:24,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620866596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:29:24,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:29:24,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:29:24,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111376223] [2022-01-10 12:29:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:29:24,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:29:24,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:29:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:29:24,308 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. 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) [2022-01-10 12:29:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:24,328 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-01-10 12:29:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:29:24,329 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 [2022-01-10 12:29:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:24,330 INFO L225 Difference]: With dead ends: 29 [2022-01-10 12:29:24,330 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 12:29:24,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:29:24,332 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:24,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 46 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:29:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 12:29:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-01-10 12:29:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:29:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 12:29:24,342 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-01-10 12:29:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:24,346 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 12:29:24,346 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) [2022-01-10 12:29:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 12:29:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 12:29:24,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:24,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:24,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:29:24,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1389113881, now seen corresponding path program 1 times [2022-01-10 12:29:24,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:24,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086352262] [2022-01-10 12:29:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:24,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:24,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:24,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:24,590 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 12:29:24,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:24,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086352262] [2022-01-10 12:29:24,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086352262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668169413] [2022-01-10 12:29:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:24,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:24,599 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 12:29:24,634 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 12:29:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 12:29:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:25,197 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 12:29:25,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:30,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668169413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:30,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:29:30,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-01-10 12:29:30,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373900558] [2022-01-10 12:29:30,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:30,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 12:29:30,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 12:29:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:29:30,070 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 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) [2022-01-10 12:29:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:30,252 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-01-10 12:29:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:29:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 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 17 [2022-01-10 12:29:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:30,254 INFO L225 Difference]: With dead ends: 33 [2022-01-10 12:29:30,254 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 12:29:30,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-10 12:29:30,256 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:30,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 80 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 12:29:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-01-10 12:29:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 12:29:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-10 12:29:30,262 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2022-01-10 12:29:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-10 12:29:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 12 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) [2022-01-10 12:29:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-10 12:29:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 12:29:30,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:30,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:30,287 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 12:29:30,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:30,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1351833754, now seen corresponding path program 1 times [2022-01-10 12:29:30,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900014983] [2022-01-10 12:29:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:30,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:30,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:29:30,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900014983] [2022-01-10 12:29:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900014983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32911556] [2022-01-10 12:29:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:30,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:30,684 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 12:29:30,694 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 12:29:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:30,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 12:29:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:29:30,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32911556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:35,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:29:35,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-01-10 12:29:35,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020720877] [2022-01-10 12:29:35,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:35,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 12:29:35,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 12:29:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 12:29:35,640 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:29:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:35,786 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-10 12:29:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:29:35,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2022-01-10 12:29:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:35,788 INFO L225 Difference]: With dead ends: 31 [2022-01-10 12:29:35,788 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 12:29:35,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-10 12:29:35,789 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:35,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 12:29:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 12:29:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 12:29:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-10 12:29:35,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2022-01-10 12:29:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:35,798 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-10 12:29:35,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:29:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-10 12:29:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 12:29:35,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:35,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:35,830 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 12:29:36,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 12:29:36,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:36,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1491325364, now seen corresponding path program 2 times [2022-01-10 12:29:36,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:36,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556817238] [2022-01-10 12:29:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:36,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:36,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:36,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:29:36,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556817238] [2022-01-10 12:29:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556817238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082764504] [2022-01-10 12:29:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:29:36,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:36,215 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 12:29:36,216 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 12:29:36,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:29:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:29:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 12:29:36,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 12:29:38,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:43,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082764504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:43,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:29:43,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-01-10 12:29:43,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558868399] [2022-01-10 12:29:43,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:43,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 12:29:43,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 12:29:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-10 12:29:43,326 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 12:29:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:43,489 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-10 12:29:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:29:43,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 24 [2022-01-10 12:29:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:43,491 INFO L225 Difference]: With dead ends: 48 [2022-01-10 12:29:43,491 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 12:29:43,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-10 12:29:43,492 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:43,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 87 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 12:29:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-10 12:29:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 12:29:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-01-10 12:29:43,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2022-01-10 12:29:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:43,499 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-01-10 12:29:43,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 12:29:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-01-10 12:29:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 12:29:43,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:43,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:43,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 12:29:43,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:43,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash -274165733, now seen corresponding path program 1 times [2022-01-10 12:29:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023625393] [2022-01-10 12:29:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:43,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:43,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:43,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:29:43,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023625393] [2022-01-10 12:29:43,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023625393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615205871] [2022-01-10 12:29:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:43,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:43,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:29:43,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 12:29:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 12:29:43,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:29:44,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:50,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615205871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:50,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:29:50,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-01-10 12:29:50,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64576917] [2022-01-10 12:29:50,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:50,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 12:29:50,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 12:29:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-10 12:29:50,780 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 13 states, 10 states have (on average 2.6) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 12:29:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:50,844 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-01-10 12:29:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 12:29:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 25 [2022-01-10 12:29:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:50,846 INFO L225 Difference]: With dead ends: 43 [2022-01-10 12:29:50,846 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 12:29:50,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-10 12:29:50,847 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:50,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:29:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 12:29:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 12:29:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 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 12:29:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-10 12:29:50,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 25 [2022-01-10 12:29:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:50,851 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-10 12:29:50,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 12:29:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-10 12:29:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 12:29:50,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:50,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:50,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 12:29:51,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:51,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1456041525, now seen corresponding path program 3 times [2022-01-10 12:29:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524184479] [2022-01-10 12:29:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:51,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:51,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:29:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:51,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:51,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:51,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:29:51,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524184479] [2022-01-10 12:29:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524184479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923906468] [2022-01-10 12:29:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:29:51,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:51,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:29:51,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 12:29:51,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 12:29:51,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:29:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 12:29:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates...