/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:23:11,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:23:11,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:23:11,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:23:11,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:23:11,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:23:11,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:23:11,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:23:11,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:23:11,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:23:11,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:23:11,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:23:11,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:23:11,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:23:11,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:23:11,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:23:11,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:23:11,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:23:11,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:23:11,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:23:11,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:23:11,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:23:11,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:23:11,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:23:11,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:23:11,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:23:11,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:23:11,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:23:11,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:23:11,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:23:11,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:23:11,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:23:11,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:23:11,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:23:11,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:23:11,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:23:11,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:23:11,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:23:11,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:23:11,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:23:11,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:23:11,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:23:11,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:23:11,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:23:11,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:23:11,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:23:11,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:23:11,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:23:11,351 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:23:11,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:23:11,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:23:11,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:23:11,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:23:11,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:23:11,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:23:11,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:23:11,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:23:11,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:23:11,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:23:11,355 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:23:11,355 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:23:11,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:23:11,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:23:11,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:23:11,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:23:11,572 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:23:11,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2022-01-10 18:23:11,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/938b45353/50a271f1fc624c2fa7cd75d1aaafa53e/FLAGfa2cd6151 [2022-01-10 18:23:11,980 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:23:11,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2022-01-10 18:23:11,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/938b45353/50a271f1fc624c2fa7cd75d1aaafa53e/FLAGfa2cd6151 [2022-01-10 18:23:11,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/938b45353/50a271f1fc624c2fa7cd75d1aaafa53e [2022-01-10 18:23:12,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:23:12,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:23:12,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:23:12,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:23:12,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:23:12,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:23:11" (1/1) ... [2022-01-10 18:23:12,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b278636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12, skipping insertion in model container [2022-01-10 18:23:12,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:23:11" (1/1) ... [2022-01-10 18:23:12,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:23:12,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:23:12,185 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/fibo_7-1.c[741,754] [2022-01-10 18:23:12,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:23:12,199 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:23:12,211 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/fibo_7-1.c[741,754] [2022-01-10 18:23:12,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:23:12,223 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:23:12,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12 WrapperNode [2022-01-10 18:23:12,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:23:12,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:23:12,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:23:12,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:23:12,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,246 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:23:12,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:23:12,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:23:12,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:23:12,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:23:12,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:23:12,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:23:12,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:23:12,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:23:12,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:23:12,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:12,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:23:12,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:23:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:23:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:23:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:23:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:23:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 18:23:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 18:23:12,373 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:23:12,374 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:23:12,483 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:23:12,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:23:12,487 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:23:12,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:12 BoogieIcfgContainer [2022-01-10 18:23:12,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:23:12,490 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:23:12,490 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:23:12,491 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:23:12,492 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:12" (1/1) ... [2022-01-10 18:23:12,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:23:12 BasicIcfg [2022-01-10 18:23:12,566 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:23:12,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:23:12,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:23:12,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:23:12,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:23:11" (1/4) ... [2022-01-10 18:23:12,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633194f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:23:12, skipping insertion in model container [2022-01-10 18:23:12,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:23:12" (2/4) ... [2022-01-10 18:23:12,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633194f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:23:12, skipping insertion in model container [2022-01-10 18:23:12,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:12" (3/4) ... [2022-01-10 18:23:12,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633194f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:23:12, skipping insertion in model container [2022-01-10 18:23:12,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:23:12" (4/4) ... [2022-01-10 18:23:12,570 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-1.cTransformedIcfg [2022-01-10 18:23:12,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:23:12,573 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:23:12,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:23:12,607 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:23:12,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:23:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 18:23:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:23:12,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:12,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:12,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-10 18:23:12,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732675248] [2022-01-10 18:23:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:12,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:12,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:12,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:12,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732675248] [2022-01-10 18:23:12,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732675248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:12,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:12,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:12,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646925970] [2022-01-10 18:23:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:12,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:12,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:12,920 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-01-10 18:23:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:13,027 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 18:23:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:13,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:23:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:13,034 INFO L225 Difference]: With dead ends: 29 [2022-01-10 18:23:13,034 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 18:23:13,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:23:13,039 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:13,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 18:23:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 18:23:13,067 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) [2022-01-10 18:23:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 18:23:13,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 18:23:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:13,070 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 18:23:13,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 18:23:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:23:13,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:13,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:13,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:23:13,075 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:13,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-10 18:23:13,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:13,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105505776] [2022-01-10 18:23:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:13,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:13,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105505776] [2022-01-10 18:23:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105505776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:13,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:13,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:13,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241824444] [2022-01-10 18:23:13,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:13,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:13,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:13,176 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) [2022-01-10 18:23:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:13,225 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 18:23:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:13,226 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 [2022-01-10 18:23:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:13,228 INFO L225 Difference]: With dead ends: 23 [2022-01-10 18:23:13,229 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 18:23:13,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:23:13,230 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 [2022-01-10 18:23:13,232 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] [2022-01-10 18:23:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 18:23:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 18:23:13,239 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) [2022-01-10 18:23:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 18:23:13,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 18:23:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:13,240 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 18:23:13,240 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) [2022-01-10 18:23:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 18:23:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:23:13,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:13,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:13,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:23:13,242 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:13,243 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-10 18:23:13,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:13,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230762967] [2022-01-10 18:23:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:13,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:23:13,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230762967] [2022-01-10 18:23:13,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230762967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116239539] [2022-01-10 18:23:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:13,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:13,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:13,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:23:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:23:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:23:14,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116239539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:14,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:14,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-10 18:23:14,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527524752] [2022-01-10 18:23:14,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:14,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 18:23:14,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 18:23:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-10 18:23:14,610 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), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-10 18:23:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:15,466 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-10 18:23:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:23:15,466 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), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-10 18:23:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:15,467 INFO L225 Difference]: With dead ends: 46 [2022-01-10 18:23:15,468 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 18:23:15,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-10 18:23:15,469 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:15,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 18:23:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 18:23:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-10 18:23:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 18:23:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 18:23:15,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-10 18:23:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:15,476 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 18:23:15,476 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), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-10 18:23:15,476 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 18:23:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 18:23:15,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:15,477 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:15,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:15,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:15,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-10 18:23:15,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:15,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706101162] [2022-01-10 18:23:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:15,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:23:15,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706101162] [2022-01-10 18:23:15,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706101162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391883830] [2022-01-10 18:23:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:15,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:15,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:15,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:23:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:23:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 18:23:16,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:23:16,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391883830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:16,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:16,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 18:23:16,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100615499] [2022-01-10 18:23:16,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 18:23:16,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 18:23:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 18:23:16,359 INFO L87 Difference]: Start difference. First operand 27 states and 38 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) [2022-01-10 18:23:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:16,480 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-10 18:23:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:23:16,481 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 [2022-01-10 18:23:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:16,482 INFO L225 Difference]: With dead ends: 43 [2022-01-10 18:23:16,482 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 18:23:16,482 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 [2022-01-10 18:23:16,483 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:16,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 18:23:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-10 18:23:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-10 18:23:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-10 18:23:16,489 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-10 18:23:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:16,489 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-10 18:23:16,490 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) [2022-01-10 18:23:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-10 18:23:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 18:23:16,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:16,491 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:16,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 18:23:16,708 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-10 18:23:16,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:16,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016658778] [2022-01-10 18:23:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:16,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:23:16,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016658778] [2022-01-10 18:23:16,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016658778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365242245] [2022-01-10 18:23:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:23:16,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:16,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:16,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:23:17,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:23:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:17,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:17,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 18:23:17,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:23:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365242245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:17,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:17,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-10 18:23:17,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052828529] [2022-01-10 18:23:17,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 18:23:17,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 18:23:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:23:17,622 INFO L87 Difference]: Start difference. First operand 29 states and 42 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) [2022-01-10 18:23:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:17,853 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-10 18:23:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:23:17,854 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 [2022-01-10 18:23:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:17,855 INFO L225 Difference]: With dead ends: 81 [2022-01-10 18:23:17,855 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 18:23:17,856 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 [2022-01-10 18:23:17,857 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 18:23:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-10 18:23:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-10 18:23:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-10 18:23:17,866 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-10 18:23:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:17,867 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-10 18:23:17,867 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) [2022-01-10 18:23:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-10 18:23:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 18:23:17,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:17,869 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:17,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 18:23:18,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:18,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-10 18:23:18,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:18,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440928835] [2022-01-10 18:23:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:18,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:23:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:23:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:23:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:23:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-10 18:23:18,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440928835] [2022-01-10 18:23:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440928835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94136625] [2022-01-10 18:23:18,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:23:18,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:18,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:18,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:23:18,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:23:18,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:23:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-01-10 18:23:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-01-10 18:23:19,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94136625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:19,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:19,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 23 [2022-01-10 18:23:19,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62275645] [2022-01-10 18:23:19,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 18:23:19,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 18:23:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-01-10 18:23:19,615 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:23:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:19,744 INFO L93 Difference]: Finished difference Result 84 states and 154 transitions. [2022-01-10 18:23:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:23:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) Word has length 82 [2022-01-10 18:23:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:19,747 INFO L225 Difference]: With dead ends: 84 [2022-01-10 18:23:19,747 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 18:23:19,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:23:19,748 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:19,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 18:23:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 18:23:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (23), 10 states have call predecessors, (23), 5 states have call successors, (23) [2022-01-10 18:23:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2022-01-10 18:23:19,754 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 82 [2022-01-10 18:23:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:19,754 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2022-01-10 18:23:19,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:23:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2022-01-10 18:23:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 18:23:19,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:19,756 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:19,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 18:23:19,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:19,972 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 326140542, now seen corresponding path program 3 times [2022-01-10 18:23:19,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:19,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425423660] [2022-01-10 18:23:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:19,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 90 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 18:23:20,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425423660] [2022-01-10 18:23:20,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425423660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334934620] [2022-01-10 18:23:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:23:20,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:20,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:20,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:23:20,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 18:23:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-10 18:23:20,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-10 18:23:21,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334934620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:21,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:21,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 9] total 21 [2022-01-10 18:23:21,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771639750] [2022-01-10 18:23:21,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:21,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 18:23:21,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 18:23:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:23:21,365 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-01-10 18:23:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:21,819 INFO L93 Difference]: Finished difference Result 88 states and 158 transitions. [2022-01-10 18:23:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:23:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 60 [2022-01-10 18:23:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:21,821 INFO L225 Difference]: With dead ends: 88 [2022-01-10 18:23:21,821 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 18:23:21,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-10 18:23:21,824 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:21,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:23:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 18:23:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-01-10 18:23:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 10 states have return successors, (32), 12 states have call predecessors, (32), 6 states have call successors, (32) [2022-01-10 18:23:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 67 transitions. [2022-01-10 18:23:21,848 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 67 transitions. Word has length 60 [2022-01-10 18:23:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:21,863 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 67 transitions. [2022-01-10 18:23:21,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-01-10 18:23:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 67 transitions. [2022-01-10 18:23:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-10 18:23:21,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:21,867 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 13, 13, 13, 13, 13, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:21,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:22,085 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 [2022-01-10 18:23:22,086 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:22,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1898382172, now seen corresponding path program 4 times [2022-01-10 18:23:22,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:22,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433740605] [2022-01-10 18:23:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:22,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 18:23:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 78 proven. 501 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2022-01-10 18:23:22,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433740605] [2022-01-10 18:23:22,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433740605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154635956] [2022-01-10 18:23:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 18:23:22,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:22,748 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) [2022-01-10 18:23:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:23:23,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 18:23:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 18:23:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 65 proven. 470 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2022-01-10 18:23:30,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 65 proven. 496 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2022-01-10 18:23:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154635956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:31,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:31,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 13] total 32 [2022-01-10 18:23:31,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810362480] [2022-01-10 18:23:31,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:31,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 18:23:31,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 18:23:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-10 18:23:31,668 INFO L87 Difference]: Start difference. First operand 44 states and 67 transitions. Second operand has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) [2022-01-10 18:23:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:33,486 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2022-01-10 18:23:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 18:23:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) Word has length 171 [2022-01-10 18:23:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:33,490 INFO L225 Difference]: With dead ends: 91 [2022-01-10 18:23:33,490 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 18:23:33,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 372 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 18:23:33,493 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 125 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:33,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 232 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 18:23:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 18:23:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 18:23:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-10 18:23:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-01-10 18:23:33,502 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 171 [2022-01-10 18:23:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:33,502 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-01-10 18:23:33,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) [2022-01-10 18:23:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-01-10 18:23:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-10 18:23:33,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:33,504 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:33,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:33,709 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 [2022-01-10 18:23:33,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2094436169, now seen corresponding path program 5 times [2022-01-10 18:23:33,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:33,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303814838] [2022-01-10 18:23:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:33,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:33,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:23:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-10 18:23:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:23:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 134 proven. 539 refuted. 0 times theorem prover too weak. 1802 trivial. 0 not checked. [2022-01-10 18:23:34,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:34,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303814838] [2022-01-10 18:23:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303814838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:34,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023834529] [2022-01-10 18:23:34,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 18:23:34,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:34,479 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) [2022-01-10 18:23:34,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 18:23:35,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-10 18:23:35,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-10 18:23:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates...