/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:58:10,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:58:10,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:58:10,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:58:10,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:58:10,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:58:10,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:58:10,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:58:10,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:58:10,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:58:10,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:58:10,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:58:10,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:58:10,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:58:10,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:58:10,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:58:10,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:58:10,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:58:11,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:58:11,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:58:11,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:58:11,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:58:11,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:58:11,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:58:11,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:58:11,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:58:11,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:58:11,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:58:11,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:58:11,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:58:11,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:58:11,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:58:11,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:58:11,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:58:11,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:58:11,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:58:11,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:58:11,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:58:11,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:58:11,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:58:11,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:58:11,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:58:11,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:58:11,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:58:11,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:58:11,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:58:11,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:58:11,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:58:11,049 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:58:11,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:58:11,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:58:11,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:58:11,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:58:11,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:58:11,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:58:11,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:58:11,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:58:11,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:58:11,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:58:11,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:58:11,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:58:11,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:58:11,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:58:11,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:58:11,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:58:11,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:58:11,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:58:11,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:58:11,055 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:58:11,055 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:58:11,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:58:11,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:58:11,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:58:11,275 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:58:11,276 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:58:11,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2022-01-11 05:58:11,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3e29551/fc74551da5454611bd8e8bce09c677e4/FLAG1326ee859 [2022-01-11 05:58:11,667 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:58:11,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2022-01-11 05:58:11,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3e29551/fc74551da5454611bd8e8bce09c677e4/FLAG1326ee859 [2022-01-11 05:58:12,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3e29551/fc74551da5454611bd8e8bce09c677e4 [2022-01-11 05:58:12,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:58:12,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:58:12,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:58:12,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:58:12,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:58:12,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8d8ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12, skipping insertion in model container [2022-01-11 05:58:12,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:58:12,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:58:12,252 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/recHanoi01.c[1213,1226] [2022-01-11 05:58:12,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:58:12,268 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:58:12,287 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/recHanoi01.c[1213,1226] [2022-01-11 05:58:12,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:58:12,301 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:58:12,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12 WrapperNode [2022-01-11 05:58:12,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:58:12,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:58:12,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:58:12,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:58:12,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,329 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2022-01-11 05:58:12,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:58:12,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:58:12,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:58:12,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:58:12,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:58:12,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:58:12,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:58:12,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:58:12,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:58:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:12,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:58:12,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:58:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:58:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2022-01-11 05:58:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2022-01-11 05:58:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-01-11 05:58:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-01-11 05:58:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:58:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:58:12,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:58:12,461 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:58:12,462 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:58:12,545 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:58:12,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:58:12,551 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:58:12,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:58:12 BoogieIcfgContainer [2022-01-11 05:58:12,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:58:12,553 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:58:12,553 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:58:12,557 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:58:12,559 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:58:12" (1/1) ... [2022-01-11 05:58:12,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:58:12 BasicIcfg [2022-01-11 05:58:12,613 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:58:12,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:58:12,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:58:12,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:58:12,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:58:12" (1/4) ... [2022-01-11 05:58:12,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599223e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:58:12, skipping insertion in model container [2022-01-11 05:58:12,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:12" (2/4) ... [2022-01-11 05:58:12,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599223e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:58:12, skipping insertion in model container [2022-01-11 05:58:12,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:58:12" (3/4) ... [2022-01-11 05:58:12,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599223e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:58:12, skipping insertion in model container [2022-01-11 05:58:12,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:58:12" (4/4) ... [2022-01-11 05:58:12,620 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi01.cTransformedIcfg [2022-01-11 05:58:12,624 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:58:12,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:58:12,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:58:12,673 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:58:12,674 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:58:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-11 05:58:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 05:58:12,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:12,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:12,690 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1653703403, now seen corresponding path program 1 times [2022-01-11 05:58:12,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:12,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959429492] [2022-01-11 05:58:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:12,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:58:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:58:13,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959429492] [2022-01-11 05:58:13,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959429492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:58:13,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:58:13,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-11 05:58:13,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279964373] [2022-01-11 05:58:13,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:58:13,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 05:58:13,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:13,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 05:58:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:58:13,124 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 05:58:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:13,321 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-01-11 05:58:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:58:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-11 05:58:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:13,336 INFO L225 Difference]: With dead ends: 43 [2022-01-11 05:58:13,336 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 05:58:13,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:58:13,347 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:13,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 99 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:58:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 05:58:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-01-11 05:58:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 05:58:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-01-11 05:58:13,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 16 [2022-01-11 05:58:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:13,395 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-01-11 05:58:13,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 05:58:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-01-11 05:58:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 05:58:13,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:13,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:13,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:58:13,400 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash 302736308, now seen corresponding path program 1 times [2022-01-11 05:58:13,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250980373] [2022-01-11 05:58:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:13,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:58:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:58:13,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:13,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250980373] [2022-01-11 05:58:13,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250980373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:58:13,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:58:13,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 05:58:13,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755953020] [2022-01-11 05:58:13,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:58:13,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:58:13,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:58:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:58:13,602 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 05:58:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:13,686 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-01-11 05:58:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:58:13,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-01-11 05:58:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:13,688 INFO L225 Difference]: With dead ends: 38 [2022-01-11 05:58:13,689 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 05:58:13,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:58:13,701 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:13,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 43 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:58:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 05:58:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-11 05:58:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 05:58:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-11 05:58:13,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2022-01-11 05:58:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:13,713 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-11 05:58:13,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 05:58:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-11 05:58:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-11 05:58:13,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:13,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:13,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:58:13,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash 533390802, now seen corresponding path program 1 times [2022-01-11 05:58:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:13,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337046076] [2022-01-11 05:58:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:13,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:13,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-11 05:58:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-11 05:58:14,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:14,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337046076] [2022-01-11 05:58:14,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337046076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:14,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497521040] [2022-01-11 05:58:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:14,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:14,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:14,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:58:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:14,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-11 05:58:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:58:14,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:58:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497521040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:14,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:14,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-11 05:58:14,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349145954] [2022-01-11 05:58:14,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 05:58:14,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 05:58:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-11 05:58:14,815 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-01-11 05:58:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:15,306 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2022-01-11 05:58:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 05:58:15,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 26 [2022-01-11 05:58:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:15,309 INFO L225 Difference]: With dead ends: 64 [2022-01-11 05:58:15,309 INFO L226 Difference]: Without dead ends: 58 [2022-01-11 05:58:15,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-11 05:58:15,310 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:15,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 114 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:58:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-11 05:58:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-01-11 05:58:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (26), 13 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-11 05:58:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-01-11 05:58:15,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 26 [2022-01-11 05:58:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:15,335 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-01-11 05:58:15,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-01-11 05:58:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-01-11 05:58:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:58:15,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:15,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:15,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:15,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:15,560 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1962087801, now seen corresponding path program 2 times [2022-01-11 05:58:15,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:15,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802373347] [2022-01-11 05:58:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:15,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-11 05:58:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:58:15,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802373347] [2022-01-11 05:58:15,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802373347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901123320] [2022-01-11 05:58:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:58:15,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:15,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:15,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:15,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:58:15,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:58:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:15,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-11 05:58:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:58:15,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:58:16,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901123320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:16,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:16,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 12 [2022-01-11 05:58:16,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308534749] [2022-01-11 05:58:16,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:16,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 05:58:16,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 05:58:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:58:16,206 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-11 05:58:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:16,344 INFO L93 Difference]: Finished difference Result 84 states and 132 transitions. [2022-01-11 05:58:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 05:58:16,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 36 [2022-01-11 05:58:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:16,349 INFO L225 Difference]: With dead ends: 84 [2022-01-11 05:58:16,349 INFO L226 Difference]: Without dead ends: 58 [2022-01-11 05:58:16,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-01-11 05:58:16,353 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:16,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 58 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:58:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-11 05:58:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-01-11 05:58:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (24), 14 states have call predecessors, (24), 13 states have call successors, (24) [2022-01-11 05:58:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2022-01-11 05:58:16,378 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 36 [2022-01-11 05:58:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:16,378 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2022-01-11 05:58:16,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-11 05:58:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2022-01-11 05:58:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-11 05:58:16,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:16,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:16,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:16,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-11 05:58:16,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash 519224667, now seen corresponding path program 1 times [2022-01-11 05:58:16,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:16,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381554089] [2022-01-11 05:58:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:16,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-11 05:58:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:58:16,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:16,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381554089] [2022-01-11 05:58:16,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381554089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:16,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623966979] [2022-01-11 05:58:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:16,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:16,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:16,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:58:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 05:58:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 05:58:17,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:58:17,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623966979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:17,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:17,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 11] total 29 [2022-01-11 05:58:17,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66129247] [2022-01-11 05:58:17,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:17,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-11 05:58:17,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-11 05:58:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-11 05:58:17,679 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 29 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 24 states have internal predecessors, (43), 13 states have call successors, (14), 2 states have call predecessors, (14), 11 states have return successors, (15), 10 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-11 05:58:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:18,130 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-01-11 05:58:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-11 05:58:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 24 states have internal predecessors, (43), 13 states have call successors, (14), 2 states have call predecessors, (14), 11 states have return successors, (15), 10 states have call predecessors, (15), 13 states have call successors, (15) Word has length 32 [2022-01-11 05:58:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:18,131 INFO L225 Difference]: With dead ends: 84 [2022-01-11 05:58:18,131 INFO L226 Difference]: Without dead ends: 54 [2022-01-11 05:58:18,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2022-01-11 05:58:18,133 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:18,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 153 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:58:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-11 05:58:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-01-11 05:58:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (26), 12 states have call predecessors, (26), 11 states have call successors, (26) [2022-01-11 05:58:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2022-01-11 05:58:18,139 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 32 [2022-01-11 05:58:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:18,139 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2022-01-11 05:58:18,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 24 states have internal predecessors, (43), 13 states have call successors, (14), 2 states have call predecessors, (14), 11 states have return successors, (15), 10 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-11 05:58:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2022-01-11 05:58:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:58:18,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:18,140 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:18,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:18,345 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 [2022-01-11 05:58:18,345 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1247253365, now seen corresponding path program 3 times [2022-01-11 05:58:18,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758051262] [2022-01-11 05:58:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:18,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-11 05:58:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:58:18,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:18,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758051262] [2022-01-11 05:58:18,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758051262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:18,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181780841] [2022-01-11 05:58:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:58:18,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:18,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:18,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:18,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:58:18,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 05:58:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-11 05:58:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:58:18,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:58:18,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181780841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:18,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:18,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-01-11 05:58:18,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871739673] [2022-01-11 05:58:18,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:18,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-11 05:58:18,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-11 05:58:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-11 05:58:18,997 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-01-11 05:58:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:19,180 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2022-01-11 05:58:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:58:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 36 [2022-01-11 05:58:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:19,184 INFO L225 Difference]: With dead ends: 78 [2022-01-11 05:58:19,184 INFO L226 Difference]: Without dead ends: 44 [2022-01-11 05:58:19,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2022-01-11 05:58:19,185 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:19,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 98 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-01-11 05:58:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-11 05:58:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-01-11 05:58:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 05:58:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-11 05:58:19,193 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 36 [2022-01-11 05:58:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:19,193 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-11 05:58:19,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-01-11 05:58:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-11 05:58:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 05:58:19,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:19,194 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:19,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:19,407 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 [2022-01-11 05:58:19,407 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1768311026, now seen corresponding path program 4 times [2022-01-11 05:58:19,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:19,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489650535] [2022-01-11 05:58:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:19,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-11 05:58:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-11 05:58:19,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489650535] [2022-01-11 05:58:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489650535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717191538] [2022-01-11 05:58:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 05:58:19,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:19,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:19,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 05:58:19,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 05:58:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-11 05:58:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-11 05:58:19,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-11 05:58:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717191538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:20,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:20,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 23 [2022-01-11 05:58:20,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979186882] [2022-01-11 05:58:20,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:20,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 05:58:20,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:20,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 05:58:20,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-11 05:58:20,208 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 12 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-01-11 05:58:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:20,528 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-01-11 05:58:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 05:58:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 12 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 46 [2022-01-11 05:58:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:20,530 INFO L225 Difference]: With dead ends: 48 [2022-01-11 05:58:20,530 INFO L226 Difference]: Without dead ends: 44 [2022-01-11 05:58:20,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-01-11 05:58:20,531 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:20,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 117 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 05:58:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-11 05:58:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-01-11 05:58:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2022-01-11 05:58:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-01-11 05:58:20,538 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 46 [2022-01-11 05:58:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:20,539 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-01-11 05:58:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 12 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-01-11 05:58:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-01-11 05:58:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-11 05:58:20,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:20,540 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:20,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:20,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:20,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash 771704955, now seen corresponding path program 2 times [2022-01-11 05:58:20,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:20,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472584009] [2022-01-11 05:58:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:20,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:20,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:20,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-11 05:58:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-11 05:58:21,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:21,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472584009] [2022-01-11 05:58:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472584009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126508825] [2022-01-11 05:58:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:58:21,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:21,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:21,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:21,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 05:58:21,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:58:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-11 05:58:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-11 05:58:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-11 05:58:23,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126508825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:23,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:23,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 18] total 38 [2022-01-11 05:58:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862389839] [2022-01-11 05:58:23,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-11 05:58:23,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-11 05:58:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-01-11 05:58:23,692 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 38 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 29 states have internal predecessors, (51), 16 states have call successors, (22), 7 states have call predecessors, (22), 16 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-01-11 05:58:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:28,492 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2022-01-11 05:58:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-11 05:58:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 29 states have internal predecessors, (51), 16 states have call successors, (22), 7 states have call predecessors, (22), 16 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) Word has length 52 [2022-01-11 05:58:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:28,494 INFO L225 Difference]: With dead ends: 95 [2022-01-11 05:58:28,494 INFO L226 Difference]: Without dead ends: 91 [2022-01-11 05:58:28,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=431, Invalid=2875, Unknown=0, NotChecked=0, Total=3306 [2022-01-11 05:58:28,496 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 143 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:28,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 219 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-11 05:58:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-11 05:58:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-01-11 05:58:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 14 states have call successors, (14), 9 states have call predecessors, (14), 13 states have return successors, (27), 18 states have call predecessors, (27), 14 states have call successors, (27) [2022-01-11 05:58:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-01-11 05:58:28,509 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 52 [2022-01-11 05:58:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:28,510 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-01-11 05:58:28,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 29 states have internal predecessors, (51), 16 states have call successors, (22), 7 states have call predecessors, (22), 16 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-01-11 05:58:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-01-11 05:58:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-11 05:58:28,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:28,511 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:28,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:28,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:28,736 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1122881838, now seen corresponding path program 3 times [2022-01-11 05:58:28,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:28,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827972266] [2022-01-11 05:58:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:28,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-11 05:58:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-11 05:58:29,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827972266] [2022-01-11 05:58:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827972266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263973029] [2022-01-11 05:58:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:58:29,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:29,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:29,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 05:58:29,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 05:58:29,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 05:58:29,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-11 05:58:30,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 34 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-11 05:58:31,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263973029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:31,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:31,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 15] total 38 [2022-01-11 05:58:31,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562764594] [2022-01-11 05:58:31,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:31,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-11 05:58:31,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-11 05:58:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2022-01-11 05:58:31,254 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 38 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (24), 2 states have call predecessors, (24), 16 states have return successors, (25), 20 states have call predecessors, (25), 15 states have call successors, (25) [2022-01-11 05:58:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:32,253 INFO L93 Difference]: Finished difference Result 141 states and 194 transitions. [2022-01-11 05:58:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-11 05:58:32,253 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (24), 2 states have call predecessors, (24), 16 states have return successors, (25), 20 states have call predecessors, (25), 15 states have call successors, (25) Word has length 58 [2022-01-11 05:58:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:32,254 INFO L225 Difference]: With dead ends: 141 [2022-01-11 05:58:32,254 INFO L226 Difference]: Without dead ends: 75 [2022-01-11 05:58:32,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 104 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=2433, Unknown=0, NotChecked=0, Total=2756 [2022-01-11 05:58:32,256 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:32,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 204 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 05:58:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-11 05:58:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-01-11 05:58:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2022-01-11 05:58:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2022-01-11 05:58:32,268 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 58 [2022-01-11 05:58:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:32,269 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2022-01-11 05:58:32,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (24), 2 states have call predecessors, (24), 16 states have return successors, (25), 20 states have call predecessors, (25), 15 states have call successors, (25) [2022-01-11 05:58:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2022-01-11 05:58:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-11 05:58:32,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:32,270 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:32,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:32,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:32,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1099675141, now seen corresponding path program 4 times [2022-01-11 05:58:32,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:32,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370551396] [2022-01-11 05:58:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:32,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-11 05:58:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:32,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-11 05:58:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:33,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 74 proven. 138 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-01-11 05:58:33,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370551396] [2022-01-11 05:58:33,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370551396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505512671] [2022-01-11 05:58:33,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 05:58:33,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:33,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:33,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 05:58:33,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 05:58:33,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-11 05:58:33,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 44 proven. 106 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-01-11 05:58:33,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-01-11 05:58:34,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505512671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:34,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:34,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 32 [2022-01-11 05:58:34,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590261830] [2022-01-11 05:58:34,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:34,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-11 05:58:34,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:34,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-11 05:58:34,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-01-11 05:58:34,365 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 32 states, 25 states have (on average 2.0) internal successors, (50), 27 states have internal predecessors, (50), 17 states have call successors, (27), 2 states have call predecessors, (27), 11 states have return successors, (27), 15 states have call predecessors, (27), 17 states have call successors, (27) [2022-01-11 05:58:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:34,978 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2022-01-11 05:58:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-11 05:58:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.0) internal successors, (50), 27 states have internal predecessors, (50), 17 states have call successors, (27), 2 states have call predecessors, (27), 11 states have return successors, (27), 15 states have call predecessors, (27), 17 states have call successors, (27) Word has length 92 [2022-01-11 05:58:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:34,979 INFO L225 Difference]: With dead ends: 110 [2022-01-11 05:58:34,980 INFO L226 Difference]: Without dead ends: 61 [2022-01-11 05:58:34,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 190 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2022-01-11 05:58:34,981 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:34,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 191 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:58:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-11 05:58:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-01-11 05:58:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-01-11 05:58:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-01-11 05:58:34,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 92 [2022-01-11 05:58:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:34,993 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-01-11 05:58:34,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.0) internal successors, (50), 27 states have internal predecessors, (50), 17 states have call successors, (27), 2 states have call predecessors, (27), 11 states have return successors, (27), 15 states have call predecessors, (27), 17 states have call successors, (27) [2022-01-11 05:58:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-01-11 05:58:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-11 05:58:34,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:34,994 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:35,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:35,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-11 05:58:35,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1155526574, now seen corresponding path program 5 times [2022-01-11 05:58:35,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:35,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148028075] [2022-01-11 05:58:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:35,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-11 05:58:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-11 05:58:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-11 05:58:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-11 05:58:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:36,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:36,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 16 proven. 167 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-01-11 05:58:36,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:36,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148028075] [2022-01-11 05:58:36,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148028075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:36,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837797553] [2022-01-11 05:58:36,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 05:58:36,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:36,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:36,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:58:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-11 05:58:36,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-11 05:58:36,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 102 conjunts are in the unsatisfiable core [2022-01-11 05:58:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates...