/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/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:57:15,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:57:15,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:57:15,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:57:15,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:57:15,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:57:15,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:57:15,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:57:15,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:57:15,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:57:15,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:57:15,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:57:15,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:57:15,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:57:15,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:57:15,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:57:15,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:57:15,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:57:15,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:57:15,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:57:15,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:57:15,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:57:15,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:57:15,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:57:15,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:57:15,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:57:15,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:57:15,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:57:15,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:57:15,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:57:15,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:57:15,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:57:15,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:57:15,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:57:15,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:57:15,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:57:15,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:57:15,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:57:15,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:57:15,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:57:15,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:57:15,315 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 05:57:15,336 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:57:15,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:57:15,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:57:15,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:57:15,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:57:15,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:57:15,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:57:15,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:57:15,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:57:15,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:57:15,339 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:57:15,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:57:15,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:57:15,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:57:15,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:57:15,340 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:57:15,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:57:15,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:57:15,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:57:15,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:57:15,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:57:15,516 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:57:15,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2022-01-11 05:57:15,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdfae2b5/3c416410a0ab446ab46a080d869f0002/FLAG2eda52821 [2022-01-11 05:57:15,892 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:57:15,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2022-01-11 05:57:15,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdfae2b5/3c416410a0ab446ab46a080d869f0002/FLAG2eda52821 [2022-01-11 05:57:16,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdfae2b5/3c416410a0ab446ab46a080d869f0002 [2022-01-11 05:57:16,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:57:16,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:57:16,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:57:16,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:57:16,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:57:16,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf0c516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16, skipping insertion in model container [2022-01-11 05:57:16,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:57:16,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:57:16,479 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/Fibonacci02.c[715,728] [2022-01-11 05:57:16,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:57:16,492 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:57:16,503 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/Fibonacci02.c[715,728] [2022-01-11 05:57:16,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:57:16,513 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:57:16,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16 WrapperNode [2022-01-11 05:57:16,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:57:16,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:57:16,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:57:16,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:57:16,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,534 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 05:57:16,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:57:16,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:57:16,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:57:16,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:57:16,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:57:16,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:57:16,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:57:16,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:57:16,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:57:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:16,588 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 05:57:16,592 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 05:57:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-01-11 05:57:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-01-11 05:57:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:57:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:57:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:57:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:57:16,667 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:57:16,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:57:16,728 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:57:16,732 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:57:16,732 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:57:16,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:57:16 BoogieIcfgContainer [2022-01-11 05:57:16,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:57:16,734 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:57:16,734 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:57:16,735 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:57:16,740 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:57:16" (1/1) ... [2022-01-11 05:57:16,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:57:16 BasicIcfg [2022-01-11 05:57:16,776 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:57:16,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:57:16,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:57:16,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:57:16,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:57:16" (1/4) ... [2022-01-11 05:57:16,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0a861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:57:16, skipping insertion in model container [2022-01-11 05:57:16,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:16" (2/4) ... [2022-01-11 05:57:16,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0a861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:57:16, skipping insertion in model container [2022-01-11 05:57:16,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:57:16" (3/4) ... [2022-01-11 05:57:16,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0a861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:57:16, skipping insertion in model container [2022-01-11 05:57:16,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:57:16" (4/4) ... [2022-01-11 05:57:16,781 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci02.cTransformedIcfg [2022-01-11 05:57:16,784 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:57:16,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:57:16,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:57:16,813 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 05:57:16,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:57:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 05:57:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 05:57:16,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:16,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:16,826 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash 831073435, now seen corresponding path program 1 times [2022-01-11 05:57:16,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:16,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488795960] [2022-01-11 05:57:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:16,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,032 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 05:57:17,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:17,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488795960] [2022-01-11 05:57:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488795960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:57:17,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:57:17,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:57:17,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935247601] [2022-01-11 05:57:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:57:17,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:57:17,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:57:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:57:17,056 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:57:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:17,129 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-01-11 05:57:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:57:17,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-11 05:57:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:17,135 INFO L225 Difference]: With dead ends: 27 [2022-01-11 05:57:17,136 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 05:57:17,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:57:17,140 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:17,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:57:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 05:57:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 05:57:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 05:57:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 05:57:17,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 05:57:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:17,169 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 05:57:17,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:57:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 05:57:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 05:57:17,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:17,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:17,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:57:17,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:17,174 INFO L85 PathProgramCache]: Analyzing trace with hash 901827128, now seen corresponding path program 1 times [2022-01-11 05:57:17,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023942329] [2022-01-11 05:57:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:17,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,227 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 05:57:17,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023942329] [2022-01-11 05:57:17,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023942329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:57:17,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:57:17,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:57:17,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333077560] [2022-01-11 05:57:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:57:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:57:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:57:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:57:17,234 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:57:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:17,287 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 05:57:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:57:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 05:57:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:17,288 INFO L225 Difference]: With dead ends: 23 [2022-01-11 05:57:17,288 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 05:57:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:57:17,290 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:57:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 05:57:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 05:57:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 05:57:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 05:57:17,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 05:57:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:17,295 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 05:57:17,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:57:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 05:57:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 05:57:17,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:17,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:17,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:57:17,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1720611576, now seen corresponding path program 1 times [2022-01-11 05:57:17,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:17,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097103720] [2022-01-11 05:57:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:17,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:57:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:17,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097103720] [2022-01-11 05:57:17,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097103720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748880313] [2022-01-11 05:57:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:17,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:17,648 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 05:57:17,689 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 05:57:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-11 05:57:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 05:57:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:18,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748880313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:18,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:18,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 05:57:18,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201641662] [2022-01-11 05:57:18,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:18,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 05:57:18,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 05:57:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:57:18,245 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-11 05:57:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:18,420 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-11 05:57:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:57:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 22 [2022-01-11 05:57:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:18,421 INFO L225 Difference]: With dead ends: 27 [2022-01-11 05:57:18,421 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 05:57:18,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-11 05:57:18,423 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:18,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 74 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 05:57:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-11 05:57:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-11 05:57:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-11 05:57:18,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-11 05:57:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:18,428 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-11 05:57:18,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-11 05:57:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-11 05:57:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 05:57:18,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:18,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:18,465 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 05:57:18,642 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 05:57:18,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash 851133793, now seen corresponding path program 1 times [2022-01-11 05:57:18,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:18,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837030789] [2022-01-11 05:57:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:18,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:18,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837030789] [2022-01-11 05:57:18,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837030789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402082367] [2022-01-11 05:57:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:18,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:18,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:18,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:57:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 05:57:18,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 05:57:18,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402082367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:19,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:19,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 05:57:19,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685763928] [2022-01-11 05:57:19,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:19,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 05:57:19,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 05:57:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:57:19,099 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 13 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-11 05:57:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:19,293 INFO L93 Difference]: Finished difference Result 54 states and 93 transitions. [2022-01-11 05:57:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 05:57:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 23 [2022-01-11 05:57:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:19,294 INFO L225 Difference]: With dead ends: 54 [2022-01-11 05:57:19,294 INFO L226 Difference]: Without dead ends: 31 [2022-01-11 05:57:19,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-11 05:57:19,296 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:19,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 73 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-11 05:57:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-11 05:57:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 05:57:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-01-11 05:57:19,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2022-01-11 05:57:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:19,302 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-01-11 05:57:19,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-11 05:57:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-01-11 05:57:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 05:57:19,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:19,303 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:19,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:57:19,519 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 05:57:19,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -656030379, now seen corresponding path program 2 times [2022-01-11 05:57:19,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:19,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760260908] [2022-01-11 05:57:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:19,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:19,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:19,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:57:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:19,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 05:57:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-11 05:57:19,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:19,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760260908] [2022-01-11 05:57:19,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760260908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:19,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200137382] [2022-01-11 05:57:19,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:57:19,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:19,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:19,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:19,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:57:19,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:57:19,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 05:57:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 05:57:20,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 05:57:20,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200137382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:20,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:20,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-11 05:57:20,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714226001] [2022-01-11 05:57:20,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:20,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 05:57:20,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 05:57:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-11 05:57:20,513 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (14), 5 states have call predecessors, (14), 10 states have call successors, (14) [2022-01-11 05:57:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:20,806 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2022-01-11 05:57:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 05:57:20,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (14), 5 states have call predecessors, (14), 10 states have call successors, (14) Word has length 34 [2022-01-11 05:57:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:20,807 INFO L225 Difference]: With dead ends: 55 [2022-01-11 05:57:20,808 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 05:57:20,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-01-11 05:57:20,809 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:20,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 92 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 05:57:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-01-11 05:57:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-11 05:57:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-11 05:57:20,813 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 34 [2022-01-11 05:57:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:20,813 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-11 05:57:20,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (14), 5 states have call predecessors, (14), 10 states have call successors, (14) [2022-01-11 05:57:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-11 05:57:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:57:20,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:20,814 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:20,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 05:57:21,023 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 05:57:21,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1849243053, now seen corresponding path program 2 times [2022-01-11 05:57:21,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421034966] [2022-01-11 05:57:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:21,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 05:57:21,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:21,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421034966] [2022-01-11 05:57:21,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421034966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:21,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901366617] [2022-01-11 05:57:21,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:57:21,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:21,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:21,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:21,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:57:21,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:57:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:21,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 05:57:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 05:57:21,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 05:57:21,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901366617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:21,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:21,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 05:57:21,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961371850] [2022-01-11 05:57:21,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:21,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 05:57:21,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 05:57:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:57:21,497 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 05:57:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:21,589 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-11 05:57:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:57:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-11 05:57:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:21,591 INFO L225 Difference]: With dead ends: 37 [2022-01-11 05:57:21,591 INFO L226 Difference]: Without dead ends: 33 [2022-01-11 05:57:21,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 05:57:21,592 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:21,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-11 05:57:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-01-11 05:57:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-11 05:57:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-11 05:57:21,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 36 [2022-01-11 05:57:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:21,599 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-11 05:57:21,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 05:57:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-11 05:57:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 05:57:21,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:21,601 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:21,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 05:57:21,816 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 05:57:21,817 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -454623176, now seen corresponding path program 3 times [2022-01-11 05:57:21,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:21,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013602519] [2022-01-11 05:57:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:21,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:22,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:22,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:22,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 05:57:22,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:22,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013602519] [2022-01-11 05:57:22,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013602519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635588942] [2022-01-11 05:57:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:57:22,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:22,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 05:57:22,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-11 05:57:22,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 05:57:22,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-11 05:57:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 05:57:22,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635588942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:22,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:22,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 05:57:22,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494118525] [2022-01-11 05:57:22,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:22,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 05:57:22,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 05:57:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 05:57:22,709 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 05:57:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:22,933 INFO L93 Difference]: Finished difference Result 70 states and 105 transitions. [2022-01-11 05:57:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:57:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-11 05:57:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:22,935 INFO L225 Difference]: With dead ends: 70 [2022-01-11 05:57:22,935 INFO L226 Difference]: Without dead ends: 46 [2022-01-11 05:57:22,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-11 05:57:22,936 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:22,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 134 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-11 05:57:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-01-11 05:57:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (23), 10 states have call predecessors, (23), 5 states have call successors, (23) [2022-01-11 05:57:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2022-01-11 05:57:22,943 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 61 [2022-01-11 05:57:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2022-01-11 05:57:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 05:57:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2022-01-11 05:57:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-11 05:57:22,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:22,944 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:22,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-11 05:57:23,148 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 05:57:23,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1256084791, now seen corresponding path program 4 times [2022-01-11 05:57:23,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:23,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008413039] [2022-01-11 05:57:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:23,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 05:57:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 05:57:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 27 proven. 154 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-01-11 05:57:23,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008413039] [2022-01-11 05:57:23,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008413039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211311284] [2022-01-11 05:57:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 05:57:23,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:23,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:57:23,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 05:57:23,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 05:57:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 05:57:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 27 proven. 142 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-01-11 05:57:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 27 proven. 157 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2022-01-11 05:57:24,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211311284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:24,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:24,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 11] total 24 [2022-01-11 05:57:24,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556619460] [2022-01-11 05:57:24,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:24,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 05:57:24,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 05:57:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-11 05:57:24,721 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 24 states, 20 states have (on average 2.7) internal successors, (54), 22 states have internal predecessors, (54), 16 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 12 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-11 05:57:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:25,418 INFO L93 Difference]: Finished difference Result 85 states and 145 transitions. [2022-01-11 05:57:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-11 05:57:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.7) internal successors, (54), 22 states have internal predecessors, (54), 16 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 12 states have call predecessors, (22), 16 states have call successors, (22) Word has length 84 [2022-01-11 05:57:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:25,420 INFO L225 Difference]: With dead ends: 85 [2022-01-11 05:57:25,420 INFO L226 Difference]: Without dead ends: 48 [2022-01-11 05:57:25,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 173 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-01-11 05:57:25,421 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:25,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 169 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 05:57:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-11 05:57:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-01-11 05:57:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-11 05:57:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-11 05:57:25,427 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 84 [2022-01-11 05:57:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:25,427 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-11 05:57:25,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.7) internal successors, (54), 22 states have internal predecessors, (54), 16 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 12 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-11 05:57:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-11 05:57:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-11 05:57:25,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:25,428 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:25,445 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 05:57:25,636 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 05:57:25,636 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1797336418, now seen corresponding path program 5 times [2022-01-11 05:57:25,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:25,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488919362] [2022-01-11 05:57:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:25,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:57:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:25,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 05:57:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 05:57:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 05:57:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 73 proven. 238 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-01-11 05:57:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488919362] [2022-01-11 05:57:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488919362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346696135] [2022-01-11 05:57:26,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 05:57:26,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:26,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:26,064 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 05:57:26,065 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 05:57:26,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-11 05:57:26,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:57:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-11 05:57:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates...