/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-simple/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:01:03,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:01:03,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:01:03,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:01:03,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:01:03,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:01:03,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:01:03,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:01:03,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:01:03,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:01:03,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:01:03,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:01:03,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:01:03,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:01:03,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:01:03,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:01:03,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:01:03,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:01:03,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:01:03,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:01:03,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:01:03,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:01:03,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:01:03,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:01:03,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:01:03,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:01:03,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:01:03,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:01:03,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:01:03,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:01:03,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:01:03,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:01:03,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:01:03,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:01:03,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:01:03,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:01:03,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:01:03,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:01:03,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:01:03,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:01:03,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:01:03,494 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 06:01:03,520 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:01:03,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:01:03,520 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:01:03,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:01:03,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:01:03,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:01:03,522 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:01:03,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:01:03,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:01:03,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:01:03,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:01:03,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:01:03,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:01:03,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:01:03,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:01:03,525 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:01:03,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:01:03,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:01:03,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:01:03,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:01:03,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:01:03,755 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:01:03,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2022-01-11 06:01:03,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a157b453/f77f336946f64424ba0457ffa29c9fc2/FLAGf3eb4e5b1 [2022-01-11 06:01:04,225 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:01:04,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2022-01-11 06:01:04,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a157b453/f77f336946f64424ba0457ffa29c9fc2/FLAGf3eb4e5b1 [2022-01-11 06:01:04,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a157b453/f77f336946f64424ba0457ffa29c9fc2 [2022-01-11 06:01:04,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:01:04,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:01:04,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:01:04,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:01:04,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:01:04,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7792432b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04, skipping insertion in model container [2022-01-11 06:01:04,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:01:04,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:01:04,411 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c[548,561] [2022-01-11 06:01:04,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:01:04,420 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:01:04,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c[548,561] [2022-01-11 06:01:04,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:01:04,444 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:01:04,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04 WrapperNode [2022-01-11 06:01:04,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:01:04,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:01:04,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:01:04,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:01:04,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,465 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-11 06:01:04,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:01:04,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:01:04,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:01:04,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:01:04,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:01:04,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:01:04,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:01:04,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:01:04,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:01:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:04,501 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 06:01:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:01:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:01:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2022-01-11 06:01:04,524 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2022-01-11 06:01:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:01:04,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:01:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-11 06:01:04,524 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-11 06:01:04,507 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 06:01:04,572 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:01:04,574 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:01:04,696 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:01:04,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:01:04,700 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 06:01:04,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:04 BoogieIcfgContainer [2022-01-11 06:01:04,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:01:04,702 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:01:04,702 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:01:04,708 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:01:04,710 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:04" (1/1) ... [2022-01-11 06:01:04,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:01:04 BasicIcfg [2022-01-11 06:01:04,815 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:01:04,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:01:04,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:01:04,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:01:04,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:01:04" (1/4) ... [2022-01-11 06:01:04,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2756a54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:01:04, skipping insertion in model container [2022-01-11 06:01:04,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:04" (2/4) ... [2022-01-11 06:01:04,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2756a54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:01:04, skipping insertion in model container [2022-01-11 06:01:04,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:04" (3/4) ... [2022-01-11 06:01:04,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2756a54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:01:04, skipping insertion in model container [2022-01-11 06:01:04,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:01:04" (4/4) ... [2022-01-11 06:01:04,822 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.cTransformedIcfg [2022-01-11 06:01:04,825 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:01:04,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:01:04,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:01:04,880 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 06:01:04,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:01:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 06:01:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 06:01:04,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:04,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:04,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1496045799, now seen corresponding path program 1 times [2022-01-11 06:01:04,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:04,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482198774] [2022-01-11 06:01:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:04,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,119 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 06:01:05,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482198774] [2022-01-11 06:01:05,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482198774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:01:05,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:01:05,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:01:05,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296078693] [2022-01-11 06:01:05,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:01:05,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:01:05,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:05,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:01:05,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:01:05,152 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 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 06:01:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:05,208 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-11 06:01:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:01:05,210 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 06:01:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:05,218 INFO L225 Difference]: With dead ends: 31 [2022-01-11 06:01:05,219 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 06:01:05,221 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 06:01:05,226 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:05,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:01:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 06:01:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 06:01:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-11 06:01:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-11 06:01:05,260 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2022-01-11 06:01:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:05,261 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-11 06:01:05,261 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 06:01:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-11 06:01:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 06:01:05,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:05,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:05,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:01:05,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:05,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1595255396, now seen corresponding path program 1 times [2022-01-11 06:01:05,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:05,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580849020] [2022-01-11 06:01:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:05,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,488 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 06:01:05,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580849020] [2022-01-11 06:01:05,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580849020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:01:05,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:01:05,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 06:01:05,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518599928] [2022-01-11 06:01:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:01:05,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 06:01:05,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 06:01:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-11 06:01:05,491 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 06:01:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:05,573 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-01-11 06:01:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:01:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-11 06:01:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:05,575 INFO L225 Difference]: With dead ends: 30 [2022-01-11 06:01:05,575 INFO L226 Difference]: Without dead ends: 26 [2022-01-11 06:01:05,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-11 06:01:05,578 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:05,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:01:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-11 06:01:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-11 06:01:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 06:01:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-11 06:01:05,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2022-01-11 06:01:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-11 06:01:05,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 06:01:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-11 06:01:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 06:01:05,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:05,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:05,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 06:01:05,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2017215412, now seen corresponding path program 1 times [2022-01-11 06:01:05,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397457354] [2022-01-11 06:01:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:05,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:01:05,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397457354] [2022-01-11 06:01:05,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397457354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228581062] [2022-01-11 06:01:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:05,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:05,788 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 06:01:05,789 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 06:01:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 06:01:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:01:06,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:01:06,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228581062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:06,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:06,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2022-01-11 06:01:06,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182879668] [2022-01-11 06:01:06,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:06,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-11 06:01:06,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:06,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-11 06:01:06,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-11 06:01:06,797 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 22 states have internal predecessors, (37), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-11 06:01:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:06,960 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-11 06:01:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:01:06,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 22 states have internal predecessors, (37), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 22 [2022-01-11 06:01:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:06,964 INFO L225 Difference]: With dead ends: 36 [2022-01-11 06:01:06,964 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 06:01:06,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-11 06:01:06,965 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:06,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 06:01:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 06:01:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-11 06:01:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-11 06:01:06,970 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2022-01-11 06:01:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:06,970 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-11 06:01:06,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 22 states have internal predecessors, (37), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-11 06:01:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-11 06:01:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 06:01:06,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:06,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:06,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 06:01:07,190 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 06:01:07,191 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash 192794447, now seen corresponding path program 1 times [2022-01-11 06:01:07,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682423245] [2022-01-11 06:01:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:07,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:07,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:01:07,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682423245] [2022-01-11 06:01:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682423245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921094214] [2022-01-11 06:01:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:07,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:07,389 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 06:01:07,423 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 06:01:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-11 06:01:07,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 06:01:07,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 06:01:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921094214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:08,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:08,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-11 06:01:08,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855825598] [2022-01-11 06:01:08,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:08,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 06:01:08,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 06:01:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-11 06:01:08,303 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 24 states have internal predecessors, (43), 9 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-11 06:01:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:08,482 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-01-11 06:01:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:01:08,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 24 states have internal predecessors, (43), 9 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 28 [2022-01-11 06:01:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:08,484 INFO L225 Difference]: With dead ends: 42 [2022-01-11 06:01:08,485 INFO L226 Difference]: Without dead ends: 38 [2022-01-11 06:01:08,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-01-11 06:01:08,486 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:08,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 196 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-11 06:01:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-01-11 06:01:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-11 06:01:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-11 06:01:08,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2022-01-11 06:01:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:08,490 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-11 06:01:08,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 24 states have internal predecessors, (43), 9 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-11 06:01:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-11 06:01:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 06:01:08,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:08,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:08,513 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 06:01:08,714 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 06:01:08,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1451199297, now seen corresponding path program 2 times [2022-01-11 06:01:08,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766290694] [2022-01-11 06:01:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:08,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:08,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:08,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:08,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:08,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-11 06:01:08,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766290694] [2022-01-11 06:01:08,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766290694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225980102] [2022-01-11 06:01:08,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:01:08,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:08,895 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 06:01:08,925 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 06:01:08,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:01:08,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-11 06:01:08,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-11 06:01:09,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 06:01:10,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225980102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:10,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:10,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 25 [2022-01-11 06:01:10,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870679044] [2022-01-11 06:01:10,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:10,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 06:01:10,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 06:01:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:01:10,110 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 25 states have internal predecessors, (45), 9 states have call successors, (9), 1 states have call predecessors, (9), 11 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-11 06:01:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:10,324 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-01-11 06:01:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:01:10,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 25 states have internal predecessors, (45), 9 states have call successors, (9), 1 states have call predecessors, (9), 11 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) Word has length 34 [2022-01-11 06:01:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:10,326 INFO L225 Difference]: With dead ends: 48 [2022-01-11 06:01:10,326 INFO L226 Difference]: Without dead ends: 44 [2022-01-11 06:01:10,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-01-11 06:01:10,327 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:10,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 173 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-11 06:01:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2022-01-11 06:01:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-11 06:01:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-11 06:01:10,332 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2022-01-11 06:01:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:10,332 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-11 06:01:10,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 25 states have internal predecessors, (45), 9 states have call successors, (9), 1 states have call predecessors, (9), 11 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-11 06:01:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-11 06:01:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-11 06:01:10,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:10,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:10,351 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 06:01:10,533 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 06:01:10,533 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 876276802, now seen corresponding path program 2 times [2022-01-11 06:01:10,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:10,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189417779] [2022-01-11 06:01:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:10,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 06:01:10,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189417779] [2022-01-11 06:01:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189417779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934326542] [2022-01-11 06:01:10,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:01:10,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:10,804 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 06:01:10,822 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 06:01:10,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:01:10,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:10,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-11 06:01:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:02:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 06:02:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:02:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 06:02:19,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934326542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:02:19,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:02:19,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-11 06:02:19,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989891958] [2022-01-11 06:02:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:02:19,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-11 06:02:19,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:02:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-11 06:02:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=881, Unknown=31, NotChecked=0, Total=992 [2022-01-11 06:02:19,523 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (16), 13 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-11 06:02:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:02:19,602 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-01-11 06:02:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 06:02:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (16), 13 states have call predecessors, (16), 1 states have call successors, (16) Word has length 40 [2022-01-11 06:02:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:02:19,603 INFO L225 Difference]: With dead ends: 54 [2022-01-11 06:02:19,603 INFO L226 Difference]: Without dead ends: 50 [2022-01-11 06:02:19,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=80, Invalid=881, Unknown=31, NotChecked=0, Total=992 [2022-01-11 06:02:19,604 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:02:19,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 675 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-01-11 06:02:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-11 06:02:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-01-11 06:02:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-11 06:02:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-11 06:02:19,609 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2022-01-11 06:02:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:02:19,609 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-11 06:02:19,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (16), 13 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-11 06:02:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-11 06:02:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 06:02:19,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:02:19,610 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:02:19,628 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 06:02:19,819 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 06:02:19,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:02:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:02:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1048486002, now seen corresponding path program 3 times [2022-01-11 06:02:19,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:02:19,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056460520] [2022-01-11 06:02:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:02:19,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:02:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:19,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:20,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:20,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:20,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:02:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:02:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-11 06:02:20,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:02:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056460520] [2022-01-11 06:02:20,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056460520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:02:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569526642] [2022-01-11 06:02:20,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:02:20,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:02:20,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:02:20,115 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 06:02:20,116 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 06:02:20,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 06:02:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:02:20,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-11 06:02:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:02:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-11 06:02:21,011 INFO L328 TraceCheckSpWp]: Computing backward predicates...