./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/gcd02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:37:18,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:37:18,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:37:18,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:37:18,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:37:18,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:37:18,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:37:18,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:37:18,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:37:18,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:37:18,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:37:18,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:37:18,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:37:18,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:37:18,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:37:18,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:37:18,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:37:18,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:37:18,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:37:18,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:37:18,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:37:18,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:37:18,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:37:18,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:37:18,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:37:18,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:37:18,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:37:18,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:37:18,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:37:18,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:37:18,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:37:18,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:37:18,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:37:18,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:37:18,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:37:18,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:37:18,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:37:18,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:37:18,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:37:18,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:37:18,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:37:18,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:37:18,449 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:37:18,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:37:18,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:37:18,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:37:18,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:37:18,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:37:18,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:37:18,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:37:18,452 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:37:18,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:37:18,453 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:37:18,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:37:18,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:37:18,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:37:18,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:37:18,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:37:18,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:37:18,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:37:18,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:37:18,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:37:18,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:37:18,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:37:18,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:37:18,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:37:18,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:37:18,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:37:18,457 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:37:18,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:37:18,457 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:37:18,457 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2023-02-15 12:37:18,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:37:18,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:37:18,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:37:18,677 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:37:18,677 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:37:18,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2023-02-15 12:37:19,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:37:19,866 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:37:19,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2023-02-15 12:37:19,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ddc6fb3/fc83c8f3120a4b32a1710d15eeac4de4/FLAGb9569d09b [2023-02-15 12:37:20,295 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ddc6fb3/fc83c8f3120a4b32a1710d15eeac4de4 [2023-02-15 12:37:20,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:37:20,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:37:20,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:37:20,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:37:20,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:37:20,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3424fec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20, skipping insertion in model container [2023-02-15 12:37:20,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:37:20,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:37:20,425 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[623,636] [2023-02-15 12:37:20,438 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2023-02-15 12:37:20,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:37:20,449 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:37:20,459 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[623,636] [2023-02-15 12:37:20,462 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2023-02-15 12:37:20,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:37:20,473 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:37:20,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20 WrapperNode [2023-02-15 12:37:20,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:37:20,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:37:20,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:37:20,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:37:20,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,498 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-02-15 12:37:20,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:37:20,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:37:20,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:37:20,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:37:20,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:37:20,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:37:20,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:37:20,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:37:20,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (1/1) ... [2023-02-15 12:37:20,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:37:20,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:20,549 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) [2023-02-15 12:37:20,551 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 [2023-02-15 12:37:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:37:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2023-02-15 12:37:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2023-02-15 12:37:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:37:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2023-02-15 12:37:20,581 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2023-02-15 12:37:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:37:20,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:37:20,627 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:37:20,629 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:37:20,721 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:37:20,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:37:20,725 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 12:37:20,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:37:20 BoogieIcfgContainer [2023-02-15 12:37:20,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:37:20,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:37:20,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:37:20,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:37:20,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:37:20" (1/3) ... [2023-02-15 12:37:20,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5061b768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:37:20, skipping insertion in model container [2023-02-15 12:37:20,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:37:20" (2/3) ... [2023-02-15 12:37:20,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5061b768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:37:20, skipping insertion in model container [2023-02-15 12:37:20,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:37:20" (3/3) ... [2023-02-15 12:37:20,732 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2023-02-15 12:37:20,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:37:20,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-15 12:37:20,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:37:20,779 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f24886, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:37:20,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-15 12:37:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 12:37:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 12:37:20,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:20,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:20,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2023-02-15 12:37:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:20,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944090938] [2023-02-15 12:37:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:20,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:37:21,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944090938] [2023-02-15 12:37:21,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944090938] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:21,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:21,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 12:37:21,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353467866] [2023-02-15 12:37:21,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:21,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 12:37:21,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 12:37:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:37:21,170 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:37:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:21,313 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2023-02-15 12:37:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:37:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 12:37:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:21,321 INFO L225 Difference]: With dead ends: 78 [2023-02-15 12:37:21,321 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 12:37:21,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:37:21,326 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:21,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 12:37:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-15 12:37:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 12:37:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-02-15 12:37:21,355 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2023-02-15 12:37:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:21,355 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-02-15 12:37:21,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:37:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-02-15 12:37:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 12:37:21,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:21,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:21,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:37:21,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:21,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2023-02-15 12:37:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:21,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729859649] [2023-02-15 12:37:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:21,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:37:21,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:21,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729859649] [2023-02-15 12:37:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729859649] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:21,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:21,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 12:37:21,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382847258] [2023-02-15 12:37:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:21,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 12:37:21,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 12:37:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:37:21,529 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:37:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:21,589 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-02-15 12:37:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:37:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 12:37:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:21,592 INFO L225 Difference]: With dead ends: 59 [2023-02-15 12:37:21,592 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 12:37:21,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:37:21,594 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:21,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 120 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:37:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 12:37:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-02-15 12:37:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 12:37:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-15 12:37:21,604 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2023-02-15 12:37:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:21,605 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-15 12:37:21,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:37:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-15 12:37:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 12:37:21,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:21,606 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:37:21,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2023-02-15 12:37:21,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:21,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887127622] [2023-02-15 12:37:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:21,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:37:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887127622] [2023-02-15 12:37:21,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887127622] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:21,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:21,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 12:37:21,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829352861] [2023-02-15 12:37:21,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:37:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:37:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:37:21,722 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:37:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:21,821 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-02-15 12:37:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:37:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 12:37:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:21,827 INFO L225 Difference]: With dead ends: 63 [2023-02-15 12:37:21,828 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 12:37:21,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:37:21,836 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:21,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:37:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 12:37:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-02-15 12:37:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 12:37:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-15 12:37:21,854 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2023-02-15 12:37:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:21,854 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-15 12:37:21,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:37:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-15 12:37:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 12:37:21,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:21,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:21,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 12:37:21,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2023-02-15 12:37:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:21,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264778271] [2023-02-15 12:37:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:21,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:21,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:37:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:37:21,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:21,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264778271] [2023-02-15 12:37:21,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264778271] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:21,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:21,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:37:21,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178988650] [2023-02-15 12:37:21,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:21,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:37:21,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:21,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:37:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:37:21,965 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 12:37:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:21,977 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-15 12:37:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:37:21,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-15 12:37:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:21,979 INFO L225 Difference]: With dead ends: 55 [2023-02-15 12:37:21,980 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 12:37:21,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:37:21,983 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:21,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:37:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 12:37:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-15 12:37:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 12:37:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-15 12:37:21,996 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2023-02-15 12:37:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:21,996 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-15 12:37:21,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 12:37:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-15 12:37:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 12:37:21,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:21,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:22,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 12:37:22,000 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2023-02-15 12:37:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442609852] [2023-02-15 12:37:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:22,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:37:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:37:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442609852] [2023-02-15 12:37:22,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442609852] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:22,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:22,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 12:37:22,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959830886] [2023-02-15 12:37:22,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:22,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:37:22,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:37:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:37:22,123 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:37:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:22,223 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-02-15 12:37:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:37:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-15 12:37:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:22,231 INFO L225 Difference]: With dead ends: 69 [2023-02-15 12:37:22,231 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 12:37:22,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:37:22,232 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:22,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 12:37:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-02-15 12:37:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-02-15 12:37:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-02-15 12:37:22,253 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2023-02-15 12:37:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:22,253 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-02-15 12:37:22,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:37:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-02-15 12:37:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 12:37:22,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:22,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 12:37:22,257 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2023-02-15 12:37:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:22,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940012013] [2023-02-15 12:37:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:37:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:37:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940012013] [2023-02-15 12:37:22,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940012013] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:22,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:22,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:37:22,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303057628] [2023-02-15 12:37:22,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:37:22,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:37:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:37:22,352 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:37:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:22,374 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2023-02-15 12:37:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:37:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-02-15 12:37:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:22,376 INFO L225 Difference]: With dead ends: 64 [2023-02-15 12:37:22,376 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 12:37:22,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:37:22,379 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:22,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:37:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 12:37:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-02-15 12:37:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-15 12:37:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-02-15 12:37:22,400 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2023-02-15 12:37:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:22,401 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-02-15 12:37:22,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:37:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-02-15 12:37:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 12:37:22,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:22,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:22,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 12:37:22,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2023-02-15 12:37:22,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:22,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321701948] [2023-02-15 12:37:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:22,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:37:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:37:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:22,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321701948] [2023-02-15 12:37:22,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321701948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319954679] [2023-02-15 12:37:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:22,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:22,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:22,615 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) [2023-02-15 12:37:22,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:37:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:22,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 12:37:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:37:22,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:37:22,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319954679] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:22,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:22,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 15 [2023-02-15 12:37:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363759491] [2023-02-15 12:37:22,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:22,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 12:37:22,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 12:37:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-15 12:37:22,941 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:37:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:23,073 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-15 12:37:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:37:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-02-15 12:37:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:23,075 INFO L225 Difference]: With dead ends: 63 [2023-02-15 12:37:23,075 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 12:37:23,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:37:23,075 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:23,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 152 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 12:37:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-02-15 12:37:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 12:37:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-02-15 12:37:23,081 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2023-02-15 12:37:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:23,083 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-02-15 12:37:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:37:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-02-15 12:37:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 12:37:23,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:23,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:23,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 12:37:23,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:23,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2023-02-15 12:37:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:23,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302933087] [2023-02-15 12:37:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 12:37:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:37:23,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302933087] [2023-02-15 12:37:23,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302933087] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565444667] [2023-02-15 12:37:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:23,461 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) [2023-02-15 12:37:23,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:37:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 12:37:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:37:23,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 12:37:23,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565444667] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:23,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:23,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-02-15 12:37:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466974110] [2023-02-15 12:37:23,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:23,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 12:37:23,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 12:37:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:37:23,867 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 12:37:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:24,000 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-02-15 12:37:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:37:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2023-02-15 12:37:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:24,003 INFO L225 Difference]: With dead ends: 74 [2023-02-15 12:37:24,003 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 12:37:24,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:37:24,005 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:24,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 202 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 12:37:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2023-02-15 12:37:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:37:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-02-15 12:37:24,015 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2023-02-15 12:37:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:24,015 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-02-15 12:37:24,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 12:37:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-02-15 12:37:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 12:37:24,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:24,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:24,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:24,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 12:37:24,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2023-02-15 12:37:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:24,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251756643] [2023-02-15 12:37:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 12:37:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 12:37:24,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251756643] [2023-02-15 12:37:24,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251756643] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:37:24,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:37:24,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 12:37:24,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869653972] [2023-02-15 12:37:24,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:37:24,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 12:37:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 12:37:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:37:24,371 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 12:37:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:24,452 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2023-02-15 12:37:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:37:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-15 12:37:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:24,454 INFO L225 Difference]: With dead ends: 80 [2023-02-15 12:37:24,454 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 12:37:24,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:37:24,456 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:24,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 12:37:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2023-02-15 12:37:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-15 12:37:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2023-02-15 12:37:24,467 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2023-02-15 12:37:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:24,468 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2023-02-15 12:37:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 12:37:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2023-02-15 12:37:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 12:37:24,469 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:24,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:24,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 12:37:24,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:24,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2023-02-15 12:37:24,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:24,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285701405] [2023-02-15 12:37:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:24,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 12:37:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:37:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:24,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285701405] [2023-02-15 12:37:24,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285701405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:24,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881930179] [2023-02-15 12:37:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:24,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:24,663 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) [2023-02-15 12:37:24,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:37:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 12:37:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:37:24,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:37:25,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881930179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:25,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:25,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2023-02-15 12:37:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554604241] [2023-02-15 12:37:25,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:25,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:37:25,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:25,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:37:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-02-15 12:37:25,183 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 12:37:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:25,346 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-02-15 12:37:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:37:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-02-15 12:37:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:25,357 INFO L225 Difference]: With dead ends: 89 [2023-02-15 12:37:25,357 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 12:37:25,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-02-15 12:37:25,358 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:25,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 185 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 12:37:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2023-02-15 12:37:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (27), 17 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-15 12:37:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2023-02-15 12:37:25,363 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2023-02-15 12:37:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:25,363 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2023-02-15 12:37:25,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 12:37:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2023-02-15 12:37:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 12:37:25,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:25,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:25,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:25,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:25,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2023-02-15 12:37:25,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:25,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358551208] [2023-02-15 12:37:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:25,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 12:37:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:25,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:25,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358551208] [2023-02-15 12:37:25,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358551208] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541132616] [2023-02-15 12:37:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:25,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:25,743 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) [2023-02-15 12:37:25,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:37:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 12:37:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:26,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541132616] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:26,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:26,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 16 [2023-02-15 12:37:26,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740004179] [2023-02-15 12:37:26,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:26,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:37:26,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:37:26,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:37:26,057 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 12:37:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:26,206 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2023-02-15 12:37:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:37:26,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2023-02-15 12:37:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:26,207 INFO L225 Difference]: With dead ends: 84 [2023-02-15 12:37:26,207 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 12:37:26,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-02-15 12:37:26,208 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:26,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 145 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 12:37:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-15 12:37:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (26), 16 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-15 12:37:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2023-02-15 12:37:26,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2023-02-15 12:37:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:26,213 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2023-02-15 12:37:26,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 12:37:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2023-02-15 12:37:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 12:37:26,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:26,213 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:26,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 12:37:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:26,419 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2023-02-15 12:37:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:26,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467917706] [2023-02-15 12:37:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:26,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:26,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:26,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:26,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 12:37:26,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467917706] [2023-02-15 12:37:26,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467917706] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607985341] [2023-02-15 12:37:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:26,679 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) [2023-02-15 12:37:26,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:37:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:37:26,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 12:37:26,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 12:37:27,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607985341] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:27,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:27,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2023-02-15 12:37:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122836512] [2023-02-15 12:37:27,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:27,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 12:37:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 12:37:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 12:37:27,462 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 39 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-02-15 12:37:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:28,019 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-02-15 12:37:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:37:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 37 [2023-02-15 12:37:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:28,020 INFO L225 Difference]: With dead ends: 103 [2023-02-15 12:37:28,021 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 12:37:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 12:37:28,022 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:28,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 455 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 12:37:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2023-02-15 12:37:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 11 states have call successors, (11), 4 states have call predecessors, (11), 10 states have return successors, (23), 14 states have call predecessors, (23), 11 states have call successors, (23) [2023-02-15 12:37:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2023-02-15 12:37:28,026 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 37 [2023-02-15 12:37:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:28,026 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2023-02-15 12:37:28,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-02-15 12:37:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2023-02-15 12:37:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 12:37:28,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:28,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:28,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 12:37:28,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2023-02-15 12:37:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389373109] [2023-02-15 12:37:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:28,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:28,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:37:28,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:28,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389373109] [2023-02-15 12:37:28,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389373109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:28,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333700268] [2023-02-15 12:37:28,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:37:28,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:28,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:28,399 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) [2023-02-15 12:37:28,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:37:28,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:37:28,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:37:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:37:28,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 12:37:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333700268] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:29,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:29,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 23 [2023-02-15 12:37:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811040377] [2023-02-15 12:37:29,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:29,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 12:37:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 12:37:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-02-15 12:37:29,163 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 23 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 12:37:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:29,478 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2023-02-15 12:37:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:37:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 37 [2023-02-15 12:37:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:29,479 INFO L225 Difference]: With dead ends: 81 [2023-02-15 12:37:29,479 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 12:37:29,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:37:29,480 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:29,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 172 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 12:37:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2023-02-15 12:37:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-15 12:37:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-15 12:37:29,484 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2023-02-15 12:37:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:29,484 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-15 12:37:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 12:37:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-15 12:37:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 12:37:29,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:29,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:29,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:29,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:29,691 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 2 times [2023-02-15 12:37:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092732013] [2023-02-15 12:37:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:29,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 12:37:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:29,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092732013] [2023-02-15 12:37:29,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092732013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:29,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084245595] [2023-02-15 12:37:29,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:37:29,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:29,937 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) [2023-02-15 12:37:29,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:37:29,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:37:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 12:37:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:37:30,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:37:30,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084245595] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:30,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:30,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2023-02-15 12:37:30,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106531946] [2023-02-15 12:37:30,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:30,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 12:37:30,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:30,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 12:37:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:37:30,525 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-15 12:37:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:30,785 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2023-02-15 12:37:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:37:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 43 [2023-02-15 12:37:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:30,786 INFO L225 Difference]: With dead ends: 76 [2023-02-15 12:37:30,786 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 12:37:30,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2023-02-15 12:37:30,787 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:30,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 253 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 12:37:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-02-15 12:37:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2023-02-15 12:37:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-02-15 12:37:30,790 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 43 [2023-02-15 12:37:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:30,790 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-02-15 12:37:30,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-15 12:37:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-02-15 12:37:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 12:37:30,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:30,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:30,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 12:37:30,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:30,996 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1996237866, now seen corresponding path program 3 times [2023-02-15 12:37:30,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436540451] [2023-02-15 12:37:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:37:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436540451] [2023-02-15 12:37:31,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436540451] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304444486] [2023-02-15 12:37:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:37:31,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:31,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:31,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:37:31,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 12:37:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 12:37:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:31,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:37:32,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304444486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:32,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:32,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2023-02-15 12:37:32,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426544495] [2023-02-15 12:37:32,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:32,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:37:32,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:37:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:37:32,165 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 12:37:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:32,507 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2023-02-15 12:37:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 12:37:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) Word has length 44 [2023-02-15 12:37:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:32,509 INFO L225 Difference]: With dead ends: 86 [2023-02-15 12:37:32,509 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 12:37:32,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:37:32,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:32,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 326 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 12:37:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2023-02-15 12:37:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 48 states have internal predecessors, (52), 10 states have call successors, (10), 4 states have call predecessors, (10), 10 states have return successors, (21), 14 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-15 12:37:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-02-15 12:37:32,513 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 44 [2023-02-15 12:37:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:32,514 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-02-15 12:37:32,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 12:37:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-02-15 12:37:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 12:37:32,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:32,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:32,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 12:37:32,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 12:37:32,718 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:32,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2023-02-15 12:37:32,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:32,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835117898] [2023-02-15 12:37:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:32,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:37:32,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835117898] [2023-02-15 12:37:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835117898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663564019] [2023-02-15 12:37:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:32,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:32,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:32,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:37:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 12:37:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:37:33,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:37:33,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663564019] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:33,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:33,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 33 [2023-02-15 12:37:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741995668] [2023-02-15 12:37:33,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:33,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 12:37:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 12:37:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 12:37:33,784 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 33 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 26 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-15 12:37:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:34,372 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2023-02-15 12:37:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:37:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 26 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2023-02-15 12:37:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:34,373 INFO L225 Difference]: With dead ends: 112 [2023-02-15 12:37:34,374 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 12:37:34,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 12:37:34,374 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:34,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 420 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 12:37:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 71. [2023-02-15 12:37:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 50 states have internal predecessors, (55), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (24), 16 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-15 12:37:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2023-02-15 12:37:34,383 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 44 [2023-02-15 12:37:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:34,384 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2023-02-15 12:37:34,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 26 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-15 12:37:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2023-02-15 12:37:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 12:37:34,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:34,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:34,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:34,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 12:37:34,590 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:34,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2023-02-15 12:37:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:34,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394741863] [2023-02-15 12:37:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:34,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:34,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:34,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:34,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:37:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394741863] [2023-02-15 12:37:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394741863] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429417654] [2023-02-15 12:37:34,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:37:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:34,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:34,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:37:34,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:37:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 12:37:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 12:37:34,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:37:35,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429417654] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:35,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:35,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 22 [2023-02-15 12:37:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847574] [2023-02-15 12:37:35,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 12:37:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 12:37:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-02-15 12:37:35,260 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 12:37:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:35,402 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2023-02-15 12:37:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:37:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) Word has length 44 [2023-02-15 12:37:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:35,403 INFO L225 Difference]: With dead ends: 99 [2023-02-15 12:37:35,404 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 12:37:35,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:37:35,404 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:35,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 261 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:37:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 12:37:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2023-02-15 12:37:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (30), 19 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 12:37:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-02-15 12:37:35,408 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 44 [2023-02-15 12:37:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:35,410 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-02-15 12:37:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 12:37:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-02-15 12:37:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 12:37:35,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:35,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:35,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 12:37:35,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2023-02-15 12:37:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:35,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651605132] [2023-02-15 12:37:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:37:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:37:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:35,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651605132] [2023-02-15 12:37:35,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651605132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:35,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931391126] [2023-02-15 12:37:35,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:37:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:35,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:35,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:37:35,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:37:35,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:35,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 12:37:35,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:37:36,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:37:37,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931391126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:37,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:37,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 44 [2023-02-15 12:37:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176792292] [2023-02-15 12:37:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 12:37:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 12:37:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 12:37:37,538 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2023-02-15 12:37:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:38,212 INFO L93 Difference]: Finished difference Result 140 states and 182 transitions. [2023-02-15 12:37:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 12:37:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) Word has length 52 [2023-02-15 12:37:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:38,215 INFO L225 Difference]: With dead ends: 140 [2023-02-15 12:37:38,215 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 12:37:38,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=2980, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 12:37:38,216 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:38,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 512 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 12:37:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 86. [2023-02-15 12:37:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.1) internal successors, (66), 58 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (36), 23 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-15 12:37:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2023-02-15 12:37:38,221 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 52 [2023-02-15 12:37:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:38,222 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2023-02-15 12:37:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2023-02-15 12:37:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2023-02-15 12:37:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 12:37:38,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:38,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:38,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:38,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 12:37:38,428 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2023-02-15 12:37:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:38,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513833177] [2023-02-15 12:37:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:37:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:37:38,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513833177] [2023-02-15 12:37:38,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513833177] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733930409] [2023-02-15 12:37:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:37:38,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:38,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:38,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:38,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 12:37:38,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:37:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 12:37:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:37:39,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:37:40,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733930409] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:40,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:40,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 36 [2023-02-15 12:37:40,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853644460] [2023-02-15 12:37:40,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:40,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:37:40,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:37:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:37:40,029 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-15 12:37:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:40,557 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2023-02-15 12:37:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 12:37:40,557 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) Word has length 52 [2023-02-15 12:37:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:40,558 INFO L225 Difference]: With dead ends: 127 [2023-02-15 12:37:40,558 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 12:37:40,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=2215, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 12:37:40,560 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:40,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 323 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 12:37:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 59. [2023-02-15 12:37:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2023-02-15 12:37:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-02-15 12:37:40,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 52 [2023-02-15 12:37:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:40,568 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-02-15 12:37:40,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-15 12:37:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-02-15 12:37:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 12:37:40,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:40,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:40,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:40,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:40,776 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:40,776 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 4 times [2023-02-15 12:37:40,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:40,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130211754] [2023-02-15 12:37:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:40,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:40,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:40,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:40,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:40,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:37:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130211754] [2023-02-15 12:37:41,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130211754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4019261] [2023-02-15 12:37:41,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:37:41,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:41,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:41,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:41,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 12:37:41,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:37:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 12:37:41,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:37:41,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:42,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4019261] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:42,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:42,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2023-02-15 12:37:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051175328] [2023-02-15 12:37:42,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 12:37:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 12:37:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-02-15 12:37:42,041 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 12:37:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:42,344 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2023-02-15 12:37:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:37:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2023-02-15 12:37:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:42,345 INFO L225 Difference]: With dead ends: 89 [2023-02-15 12:37:42,345 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 12:37:42,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 12:37:42,346 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:42,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 414 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 12:37:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2023-02-15 12:37:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (22), 15 states have call predecessors, (22), 10 states have call successors, (22) [2023-02-15 12:37:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-02-15 12:37:42,349 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 51 [2023-02-15 12:37:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:42,349 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-02-15 12:37:42,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 12:37:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-02-15 12:37:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 12:37:42,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:42,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:42,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 12:37:42,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-15 12:37:42,551 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2023-02-15 12:37:42,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:42,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941335450] [2023-02-15 12:37:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:42,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:37:42,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941335450] [2023-02-15 12:37:42,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941335450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736901563] [2023-02-15 12:37:42,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:37:42,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:42,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:42,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:42,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 12:37:42,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-15 12:37:42,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 12:37:42,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:37:43,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:37:43,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736901563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:43,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:43,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 29 [2023-02-15 12:37:43,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713161646] [2023-02-15 12:37:43,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 12:37:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 12:37:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2023-02-15 12:37:43,895 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 29 states, 28 states have (on average 2.5) internal successors, (70), 24 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 12:37:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:44,239 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2023-02-15 12:37:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:37:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 24 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2023-02-15 12:37:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:44,240 INFO L225 Difference]: With dead ends: 97 [2023-02-15 12:37:44,240 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 12:37:44,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 12:37:44,241 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:44,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 423 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 12:37:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2023-02-15 12:37:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (24), 16 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-15 12:37:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2023-02-15 12:37:44,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2023-02-15 12:37:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:44,259 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2023-02-15 12:37:44,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 24 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 12:37:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2023-02-15 12:37:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 12:37:44,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:44,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:44,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:44,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:44,465 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:44,465 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2023-02-15 12:37:44,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:44,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754174375] [2023-02-15 12:37:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:37:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:37:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:44,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754174375] [2023-02-15 12:37:44,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754174375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666885384] [2023-02-15 12:37:44,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:37:44,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:44,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:44,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:44,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 12:37:44,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-15 12:37:44,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 12:37:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 12:37:44,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 12:37:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666885384] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:45,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:45,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2023-02-15 12:37:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065765983] [2023-02-15 12:37:45,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:45,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 12:37:45,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 12:37:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:37:45,677 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-15 12:37:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:46,012 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2023-02-15 12:37:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:37:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) Word has length 51 [2023-02-15 12:37:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:46,014 INFO L225 Difference]: With dead ends: 91 [2023-02-15 12:37:46,014 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 12:37:46,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:37:46,015 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:46,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 357 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 12:37:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2023-02-15 12:37:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (24), 17 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-15 12:37:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2023-02-15 12:37:46,020 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2023-02-15 12:37:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:46,020 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2023-02-15 12:37:46,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-15 12:37:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2023-02-15 12:37:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:37:46,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:46,023 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:46,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:46,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:46,225 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2023-02-15 12:37:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:46,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092474922] [2023-02-15 12:37:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:46,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:37:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:37:46,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092474922] [2023-02-15 12:37:46,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092474922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988130499] [2023-02-15 12:37:46,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:37:46,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:46,541 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:46,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 12:37:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 12:37:46,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 12:37:46,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 12:37:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988130499] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:47,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:47,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2023-02-15 12:37:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242662098] [2023-02-15 12:37:47,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 12:37:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 12:37:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:37:47,942 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 12:37:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:48,255 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2023-02-15 12:37:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 12:37:48,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2023-02-15 12:37:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:48,256 INFO L225 Difference]: With dead ends: 104 [2023-02-15 12:37:48,256 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 12:37:48,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 12:37:48,257 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:48,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 380 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 12:37:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2023-02-15 12:37:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 14 states have return successors, (30), 20 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 12:37:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-02-15 12:37:48,261 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 59 [2023-02-15 12:37:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:48,261 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-02-15 12:37:48,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 12:37:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-02-15 12:37:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:37:48,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:48,262 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:48,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 12:37:48,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 12:37:48,476 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 5 times [2023-02-15 12:37:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:48,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272683849] [2023-02-15 12:37:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:37:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 12:37:48,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:48,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272683849] [2023-02-15 12:37:48,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272683849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:48,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016389142] [2023-02-15 12:37:48,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:37:48,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:48,811 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:48,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 12:37:48,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 12:37:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 12:37:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 12:37:49,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:37:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016389142] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:50,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:50,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 45 [2023-02-15 12:37:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693561235] [2023-02-15 12:37:50,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:50,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 12:37:50,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 12:37:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:37:50,402 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 12:37:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:50,945 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-02-15 12:37:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:37:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2023-02-15 12:37:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:50,946 INFO L225 Difference]: With dead ends: 116 [2023-02-15 12:37:50,946 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 12:37:50,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=310, Invalid=2660, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 12:37:50,947 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:50,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 575 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 12:37:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2023-02-15 12:37:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (33), 21 states have call predecessors, (33), 10 states have call successors, (33) [2023-02-15 12:37:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2023-02-15 12:37:50,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2023-02-15 12:37:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:50,952 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2023-02-15 12:37:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 12:37:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2023-02-15 12:37:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:37:50,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:50,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:50,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:51,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:51,158 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2023-02-15 12:37:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:51,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128953886] [2023-02-15 12:37:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:37:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 12:37:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128953886] [2023-02-15 12:37:51,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128953886] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17051655] [2023-02-15 12:37:51,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:37:51,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:51,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:51,423 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:51,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 12:37:51,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:37:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:51,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 12:37:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 12:37:51,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 12:37:52,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17051655] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:52,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:52,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 30 [2023-02-15 12:37:52,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756036939] [2023-02-15 12:37:52,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:52,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 12:37:52,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 12:37:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2023-02-15 12:37:52,616 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 12:37:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:52,850 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2023-02-15 12:37:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 12:37:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2023-02-15 12:37:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:52,852 INFO L225 Difference]: With dead ends: 113 [2023-02-15 12:37:52,852 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 12:37:52,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 12:37:52,853 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:52,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 447 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 12:37:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2023-02-15 12:37:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (33), 21 states have call predecessors, (33), 10 states have call successors, (33) [2023-02-15 12:37:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2023-02-15 12:37:52,863 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2023-02-15 12:37:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:52,863 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2023-02-15 12:37:52,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 12:37:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2023-02-15 12:37:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:37:52,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:52,864 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:52,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:53,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:53,069 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2023-02-15 12:37:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:53,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932427262] [2023-02-15 12:37:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:53,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:37:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:37:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:37:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 12:37:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:53,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932427262] [2023-02-15 12:37:53,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932427262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:53,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072590472] [2023-02-15 12:37:53,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:37:53,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:53,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:53,479 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 12:37:53,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:37:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 12:37:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 12:37:53,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:05,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072590472] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:05,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:38:05,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2023-02-15 12:38:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322744022] [2023-02-15 12:38:05,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 12:38:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 12:38:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1829, Unknown=2, NotChecked=0, Total=1980 [2023-02-15 12:38:05,047 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-15 12:38:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:05,698 INFO L93 Difference]: Finished difference Result 151 states and 200 transitions. [2023-02-15 12:38:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 12:38:05,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2023-02-15 12:38:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:05,700 INFO L225 Difference]: With dead ends: 151 [2023-02-15 12:38:05,700 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 12:38:05,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=293, Invalid=2897, Unknown=2, NotChecked=0, Total=3192 [2023-02-15 12:38:05,701 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:05,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 616 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:38:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 12:38:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2023-02-15 12:38:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 68 states have internal predecessors, (76), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (47), 28 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-15 12:38:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2023-02-15 12:38:05,715 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 59 [2023-02-15 12:38:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:05,715 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2023-02-15 12:38:05,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-15 12:38:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2023-02-15 12:38:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:38:05,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:05,716 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:05,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:05,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:05,923 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2023-02-15 12:38:05,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:05,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575097077] [2023-02-15 12:38:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:05,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:38:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 12:38:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575097077] [2023-02-15 12:38:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575097077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990098617] [2023-02-15 12:38:06,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:38:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:06,265 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:06,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 12:38:06,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:38:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 12:38:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 12:38:06,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:38:08,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990098617] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:08,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:08,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 46 [2023-02-15 12:38:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971286203] [2023-02-15 12:38:08,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:08,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 12:38:08,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 12:38:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 12:38:08,355 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 12:38:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:09,040 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2023-02-15 12:38:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 12:38:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2023-02-15 12:38:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:09,042 INFO L225 Difference]: With dead ends: 160 [2023-02-15 12:38:09,042 INFO L226 Difference]: Without dead ends: 156 [2023-02-15 12:38:09,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=411, Invalid=3249, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 12:38:09,043 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:09,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 759 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:38:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-15 12:38:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2023-02-15 12:38:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.088235294117647) internal successors, (74), 66 states have internal predecessors, (74), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (44), 27 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-15 12:38:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2023-02-15 12:38:09,062 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 59 [2023-02-15 12:38:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:09,063 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2023-02-15 12:38:09,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 12:38:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2023-02-15 12:38:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:38:09,063 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:09,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:09,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-15 12:38:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 12:38:09,269 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 11 times [2023-02-15 12:38:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:09,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481932232] [2023-02-15 12:38:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:38:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 12:38:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481932232] [2023-02-15 12:38:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481932232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410820191] [2023-02-15 12:38:09,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:38:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:09,582 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:09,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 12:38:09,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 12:38:09,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:09,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 12:38:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 12:38:09,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:38:11,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410820191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:11,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:11,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 36 [2023-02-15 12:38:11,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135496248] [2023-02-15 12:38:11,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:11,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:38:11,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:38:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:38:11,138 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 36 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 29 states have internal predecessors, (78), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (16), 10 states have call predecessors, (16), 14 states have call successors, (16) [2023-02-15 12:38:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:11,569 INFO L93 Difference]: Finished difference Result 156 states and 210 transitions. [2023-02-15 12:38:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:38:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 29 states have internal predecessors, (78), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (16), 10 states have call predecessors, (16), 14 states have call successors, (16) Word has length 59 [2023-02-15 12:38:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:11,571 INFO L225 Difference]: With dead ends: 156 [2023-02-15 12:38:11,571 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 12:38:11,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 12:38:11,572 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:11,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 412 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:38:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 12:38:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2023-02-15 12:38:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 72 states have internal predecessors, (80), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (53), 30 states have call predecessors, (53), 10 states have call successors, (53) [2023-02-15 12:38:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2023-02-15 12:38:11,578 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 59 [2023-02-15 12:38:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:11,578 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2023-02-15 12:38:11,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 29 states have internal predecessors, (78), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (16), 10 states have call predecessors, (16), 14 states have call successors, (16) [2023-02-15 12:38:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2023-02-15 12:38:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 12:38:11,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:11,579 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:11,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:11,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 12:38:11,785 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 12 times [2023-02-15 12:38:11,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:11,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642777959] [2023-02-15 12:38:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:11,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:11,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:11,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:12,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:38:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:12,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:12,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 12:38:12,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:12,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642777959] [2023-02-15 12:38:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642777959] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441489624] [2023-02-15 12:38:12,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:38:12,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:12,121 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:12,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 12:38:12,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 12:38:12,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 12:38:12,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 12:38:12,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:38:14,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441489624] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:14,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:14,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 25] total 47 [2023-02-15 12:38:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158570374] [2023-02-15 12:38:14,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 12:38:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 12:38:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1998, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 12:38:14,594 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand has 47 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 36 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2023-02-15 12:38:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:15,551 INFO L93 Difference]: Finished difference Result 180 states and 244 transitions. [2023-02-15 12:38:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 12:38:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 36 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) Word has length 67 [2023-02-15 12:38:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:15,552 INFO L225 Difference]: With dead ends: 180 [2023-02-15 12:38:15,552 INFO L226 Difference]: Without dead ends: 176 [2023-02-15 12:38:15,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=506, Invalid=3654, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 12:38:15,554 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 76 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:15,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 637 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:38:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-15 12:38:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 108. [2023-02-15 12:38:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.08) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (53), 31 states have call predecessors, (53), 10 states have call successors, (53) [2023-02-15 12:38:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 144 transitions. [2023-02-15 12:38:15,560 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 144 transitions. Word has length 67 [2023-02-15 12:38:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:15,560 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 144 transitions. [2023-02-15 12:38:15,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 36 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2023-02-15 12:38:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 144 transitions. [2023-02-15 12:38:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 12:38:15,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:15,561 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:15,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-15 12:38:15,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 12:38:15,766 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 13 times [2023-02-15 12:38:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921039207] [2023-02-15 12:38:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:16,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:16,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:38:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:16,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:16,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 12:38:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921039207] [2023-02-15 12:38:16,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921039207] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904436452] [2023-02-15 12:38:16,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:38:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:16,154 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:16,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 12:38:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:16,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 12:38:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 12:38:16,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 12:38:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904436452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:18,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:18,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 25] total 44 [2023-02-15 12:38:18,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500608477] [2023-02-15 12:38:18,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:18,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 12:38:18,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 12:38:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 12:38:18,353 INFO L87 Difference]: Start difference. First operand 108 states and 144 transitions. Second operand has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 18 states have call successors, (24) [2023-02-15 12:38:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:19,194 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2023-02-15 12:38:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 12:38:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 18 states have call successors, (24) Word has length 67 [2023-02-15 12:38:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:19,195 INFO L225 Difference]: With dead ends: 180 [2023-02-15 12:38:19,195 INFO L226 Difference]: Without dead ends: 176 [2023-02-15 12:38:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 114 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 12:38:19,196 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:19,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 658 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:38:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-15 12:38:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 104. [2023-02-15 12:38:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 70 states have internal predecessors, (78), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (50), 29 states have call predecessors, (50), 10 states have call successors, (50) [2023-02-15 12:38:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2023-02-15 12:38:19,203 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 67 [2023-02-15 12:38:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:19,203 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2023-02-15 12:38:19,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 18 states have call successors, (24) [2023-02-15 12:38:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2023-02-15 12:38:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 12:38:19,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:19,203 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:19,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:19,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:19,404 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 14 times [2023-02-15 12:38:19,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:19,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860790802] [2023-02-15 12:38:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:19,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:38:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 12:38:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860790802] [2023-02-15 12:38:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860790802] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477257210] [2023-02-15 12:38:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:38:19,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:19,770 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:19,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 12:38:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:38:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 12:38:19,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 12:38:20,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 12:38:22,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477257210] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:22,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:22,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 25] total 48 [2023-02-15 12:38:22,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420308707] [2023-02-15 12:38:22,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:22,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 12:38:22,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 12:38:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 12:38:22,173 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 18 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) [2023-02-15 12:38:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:22,702 INFO L93 Difference]: Finished difference Result 174 states and 238 transitions. [2023-02-15 12:38:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:38:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 18 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) Word has length 67 [2023-02-15 12:38:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:22,706 INFO L225 Difference]: With dead ends: 174 [2023-02-15 12:38:22,706 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 12:38:22,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=3393, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 12:38:22,707 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:22,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 604 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:38:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 12:38:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 96. [2023-02-15 12:38:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (44), 25 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-15 12:38:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2023-02-15 12:38:22,715 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 67 [2023-02-15 12:38:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:22,716 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2023-02-15 12:38:22,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 18 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) [2023-02-15 12:38:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2023-02-15 12:38:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 12:38:22,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:22,719 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:22,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:22,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:22,925 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 15 times [2023-02-15 12:38:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:22,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632220054] [2023-02-15 12:38:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:22,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:38:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 12:38:23,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:23,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632220054] [2023-02-15 12:38:23,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632220054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:23,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293774549] [2023-02-15 12:38:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:38:23,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:23,267 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:23,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 12:38:23,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 12:38:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 12:38:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 12:38:23,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 12:38:26,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293774549] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:26,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:26,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 25] total 52 [2023-02-15 12:38:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675437778] [2023-02-15 12:38:26,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:26,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 12:38:26,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 12:38:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2478, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 12:38:26,161 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 52 states, 49 states have (on average 2.122448979591837) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2023-02-15 12:38:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:27,383 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2023-02-15 12:38:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 12:38:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.122448979591837) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) Word has length 67 [2023-02-15 12:38:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:27,385 INFO L225 Difference]: With dead ends: 172 [2023-02-15 12:38:27,385 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 12:38:27,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=464, Invalid=4506, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 12:38:27,385 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:27,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 624 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:38:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 12:38:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 63. [2023-02-15 12:38:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2023-02-15 12:38:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-02-15 12:38:27,390 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 67 [2023-02-15 12:38:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:27,390 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-02-15 12:38:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.122448979591837) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2023-02-15 12:38:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-02-15 12:38:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 12:38:27,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:27,391 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:27,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 12:38:27,598 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 6 times [2023-02-15 12:38:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:27,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361399351] [2023-02-15 12:38:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:38:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:38:27,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:27,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361399351] [2023-02-15 12:38:27,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361399351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:27,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526504280] [2023-02-15 12:38:27,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:38:27,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:27,908 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:27,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 12:38:28,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 12:38:28,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 12:38:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:38:28,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:38:29,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526504280] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:29,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:29,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2023-02-15 12:38:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97276775] [2023-02-15 12:38:29,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 12:38:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 12:38:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 12:38:29,392 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 12:38:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:29,695 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2023-02-15 12:38:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:38:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2023-02-15 12:38:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:29,696 INFO L225 Difference]: With dead ends: 85 [2023-02-15 12:38:29,696 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 12:38:29,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 12:38:29,697 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:29,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 365 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:38:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 12:38:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2023-02-15 12:38:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2023-02-15 12:38:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2023-02-15 12:38:29,701 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2023-02-15 12:38:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:29,701 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2023-02-15 12:38:29,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 12:38:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2023-02-15 12:38:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 12:38:29,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:29,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:29,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:29,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-15 12:38:29,908 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 16 times [2023-02-15 12:38:29,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:29,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148801756] [2023-02-15 12:38:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:29,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 12:38:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:38:30,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148801756] [2023-02-15 12:38:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148801756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528712873] [2023-02-15 12:38:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:38:30,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:30,235 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:30,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 12:38:30,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:38:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:30,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 12:38:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:38:30,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:38:31,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528712873] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:31,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:31,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2023-02-15 12:38:31,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924655115] [2023-02-15 12:38:31,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:31,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 12:38:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 12:38:31,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 12:38:31,786 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 12:38:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:32,210 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2023-02-15 12:38:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:38:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2023-02-15 12:38:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:32,211 INFO L225 Difference]: With dead ends: 89 [2023-02-15 12:38:32,211 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 12:38:32,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=2176, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 12:38:32,212 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:32,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 424 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:38:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 12:38:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2023-02-15 12:38:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 11 states have return successors, (20), 15 states have call predecessors, (20), 9 states have call successors, (20) [2023-02-15 12:38:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-02-15 12:38:32,215 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2023-02-15 12:38:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:32,215 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-02-15 12:38:32,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 12:38:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-02-15 12:38:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:38:32,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:32,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:32,421 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 17 times [2023-02-15 12:38:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140303444] [2023-02-15 12:38:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:38:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 12:38:32,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:32,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140303444] [2023-02-15 12:38:32,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140303444] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:32,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315624319] [2023-02-15 12:38:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:38:32,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:32,778 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:32,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 12:38:33,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 12:38:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 12:38:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:38:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 12:38:34,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315624319] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:34,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:34,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 42 [2023-02-15 12:38:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542672064] [2023-02-15 12:38:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 12:38:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 12:38:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:38:34,259 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-15 12:38:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:34,765 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2023-02-15 12:38:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:38:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2023-02-15 12:38:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:34,767 INFO L225 Difference]: With dead ends: 90 [2023-02-15 12:38:34,767 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 12:38:34,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 12:38:34,768 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:34,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 460 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:38:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 12:38:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2023-02-15 12:38:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (22), 15 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-15 12:38:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-02-15 12:38:34,771 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2023-02-15 12:38:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:34,772 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-02-15 12:38:34,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-15 12:38:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-02-15 12:38:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:38:34,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:34,772 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:34,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:34,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:34,978 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:34,978 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 7 times [2023-02-15 12:38:34,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:34,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993660549] [2023-02-15 12:38:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:34,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:38:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 12:38:35,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:35,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993660549] [2023-02-15 12:38:35,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993660549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:35,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059701725] [2023-02-15 12:38:35,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:38:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:35,255 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:35,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 12:38:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 12:38:35,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 12:38:35,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:38:37,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059701725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:37,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:37,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 34 [2023-02-15 12:38:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576419298] [2023-02-15 12:38:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 12:38:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 12:38:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:38:37,094 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 12:38:37,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:37,510 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2023-02-15 12:38:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:38:37,511 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2023-02-15 12:38:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:37,512 INFO L225 Difference]: With dead ends: 101 [2023-02-15 12:38:37,512 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 12:38:37,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:38:37,512 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:37,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 518 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:38:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 12:38:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2023-02-15 12:38:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2023-02-15 12:38:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-02-15 12:38:37,516 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2023-02-15 12:38:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:37,516 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-02-15 12:38:37,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 12:38:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-02-15 12:38:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:38:37,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:37,517 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:37,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:37,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:37,723 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:37,723 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 18 times [2023-02-15 12:38:37,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:37,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437078744] [2023-02-15 12:38:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:37,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:38:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 12:38:38,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:38,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437078744] [2023-02-15 12:38:38,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437078744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:38,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443001772] [2023-02-15 12:38:38,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:38:38,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:38,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:38,101 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 12:38:38,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 12:38:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 12:38:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:38:38,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 12:38:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443001772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:40,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:40,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 42 [2023-02-15 12:38:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294327919] [2023-02-15 12:38:40,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 12:38:40,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 12:38:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1583, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:38:40,073 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-15 12:38:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:40,594 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2023-02-15 12:38:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:38:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2023-02-15 12:38:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:40,595 INFO L225 Difference]: With dead ends: 102 [2023-02-15 12:38:40,595 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 12:38:40,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=2466, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 12:38:40,596 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:40,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 576 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:38:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 12:38:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2023-02-15 12:38:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2023-02-15 12:38:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-02-15 12:38:40,600 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2023-02-15 12:38:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-02-15 12:38:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-15 12:38:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-02-15 12:38:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:38:40,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:40,601 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:40,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:40,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 12:38:40,805 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 19 times [2023-02-15 12:38:40,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:40,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796536451] [2023-02-15 12:38:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:38:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:40,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:38:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:38:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 12:38:41,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796536451] [2023-02-15 12:38:41,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796536451] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917906155] [2023-02-15 12:38:41,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:38:41,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:41,186 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:41,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 12:38:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 12:38:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 12:38:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:57,218 WARN L233 SmtUtils]: Spent 11.24s on a formula simplification. DAG size of input: 87 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:39:12,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917906155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:12,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:39:12,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 34 [2023-02-15 12:39:12,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663759524] [2023-02-15 12:39:12,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:12,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 12:39:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:12,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 12:39:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2271, Unknown=6, NotChecked=0, Total=2450 [2023-02-15 12:39:12,226 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 states have internal predecessors, (61), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:39:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:13,127 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2023-02-15 12:39:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 12:39:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 states have internal predecessors, (61), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 66 [2023-02-15 12:39:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:13,129 INFO L225 Difference]: With dead ends: 139 [2023-02-15 12:39:13,129 INFO L226 Difference]: Without dead ends: 135 [2023-02-15 12:39:13,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=438, Invalid=3978, Unknown=6, NotChecked=0, Total=4422 [2023-02-15 12:39:13,152 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:13,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 703 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:39:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-15 12:39:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2023-02-15 12:39:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 25 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 12:39:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2023-02-15 12:39:13,160 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2023-02-15 12:39:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:13,160 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2023-02-15 12:39:13,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 states have internal predecessors, (61), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:39:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2023-02-15 12:39:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:39:13,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:13,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:13,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:13,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 12:39:13,362 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:13,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 20 times [2023-02-15 12:39:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:13,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96339992] [2023-02-15 12:39:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:13,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:39:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:39:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 12:39:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96339992] [2023-02-15 12:39:13,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96339992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100727834] [2023-02-15 12:39:13,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:39:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:13,746 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:13,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 12:39:14,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:39:14,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 12:39:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 12:39:14,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:39,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100727834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:39,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:39:39,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2023-02-15 12:39:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937319959] [2023-02-15 12:39:39,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 12:39:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:39,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 12:39:39,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1823, Unknown=9, NotChecked=0, Total=1980 [2023-02-15 12:39:39,513 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2023-02-15 12:39:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:40,140 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2023-02-15 12:39:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:39:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) Word has length 66 [2023-02-15 12:39:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:40,141 INFO L225 Difference]: With dead ends: 136 [2023-02-15 12:39:40,141 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 12:39:40,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=327, Invalid=2970, Unknown=9, NotChecked=0, Total=3306 [2023-02-15 12:39:40,142 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:40,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 497 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:39:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 12:39:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2023-02-15 12:39:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (43), 26 states have call predecessors, (43), 10 states have call successors, (43) [2023-02-15 12:39:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-02-15 12:39:40,147 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 66 [2023-02-15 12:39:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:40,147 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-02-15 12:39:40,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2023-02-15 12:39:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-02-15 12:39:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:39:40,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:40,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:40,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 12:39:40,348 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash 724242656, now seen corresponding path program 21 times [2023-02-15 12:39:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:40,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274999377] [2023-02-15 12:39:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:39:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:39:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 12:39:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274999377] [2023-02-15 12:39:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274999377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046856851] [2023-02-15 12:39:40,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:39:40,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:40,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:40,699 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:40,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 12:39:41,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:39:41,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 12:39:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 12:39:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:39:42,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046856851] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:39:42,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:39:42,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2023-02-15 12:39:42,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300039593] [2023-02-15 12:39:42,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:42,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:39:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:39:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:39:42,849 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 36 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 29 states have internal predecessors, (83), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (20), 11 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 12:39:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:43,225 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2023-02-15 12:39:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:39:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 29 states have internal predecessors, (83), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (20), 11 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2023-02-15 12:39:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:43,226 INFO L225 Difference]: With dead ends: 127 [2023-02-15 12:39:43,227 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 12:39:43,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 12:39:43,227 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 62 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:43,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 592 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:39:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 12:39:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2023-02-15 12:39:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (45), 28 states have call predecessors, (45), 10 states have call successors, (45) [2023-02-15 12:39:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2023-02-15 12:39:43,232 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 66 [2023-02-15 12:39:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:43,232 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2023-02-15 12:39:43,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 29 states have internal predecessors, (83), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (20), 11 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 12:39:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2023-02-15 12:39:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:39:43,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:43,234 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:43,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 12:39:43,439 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:43,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1898709812, now seen corresponding path program 8 times [2023-02-15 12:39:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:43,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833090162] [2023-02-15 12:39:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:39:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:39:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 12:39:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833090162] [2023-02-15 12:39:43,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833090162] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031367811] [2023-02-15 12:39:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:39:43,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:43,794 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:43,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 12:39:44,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:39:44,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:39:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 12:39:44,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:45,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031367811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:45,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:39:45,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 33 [2023-02-15 12:39:45,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743005678] [2023-02-15 12:39:45,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:45,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 12:39:45,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 12:39:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1596, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:39:45,916 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:39:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:46,440 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2023-02-15 12:39:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:39:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 74 [2023-02-15 12:39:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:46,441 INFO L225 Difference]: With dead ends: 145 [2023-02-15 12:39:46,441 INFO L226 Difference]: Without dead ends: 141 [2023-02-15 12:39:46,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=2753, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 12:39:46,444 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:46,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 619 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:39:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-15 12:39:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2023-02-15 12:39:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (39), 26 states have call predecessors, (39), 10 states have call successors, (39) [2023-02-15 12:39:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2023-02-15 12:39:46,467 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 74 [2023-02-15 12:39:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:46,467 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2023-02-15 12:39:46,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:39:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2023-02-15 12:39:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:39:46,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:46,469 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:46,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:46,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:46,669 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:46,669 INFO L85 PathProgramCache]: Analyzing trace with hash -599965996, now seen corresponding path program 22 times [2023-02-15 12:39:46,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:46,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963144382] [2023-02-15 12:39:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:46,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:39:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:39:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:46,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 12:39:47,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:47,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963144382] [2023-02-15 12:39:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963144382] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040125822] [2023-02-15 12:39:47,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:39:47,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:47,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:47,017 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:47,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 12:39:47,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:39:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:47,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 12:39:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 12:39:47,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:51,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040125822] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:51,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:39:51,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-02-15 12:39:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437889734] [2023-02-15 12:39:51,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 12:39:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 12:39:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=960, Unknown=1, NotChecked=0, Total=1056 [2023-02-15 12:39:51,658 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 20 states have internal predecessors, (56), 8 states have call successors, (9), 1 states have call predecessors, (9), 11 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 12:39:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:52,116 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2023-02-15 12:39:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:39:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 20 states have internal predecessors, (56), 8 states have call successors, (9), 1 states have call predecessors, (9), 11 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 74 [2023-02-15 12:39:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:52,117 INFO L225 Difference]: With dead ends: 131 [2023-02-15 12:39:52,117 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 12:39:52,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=208, Invalid=1771, Unknown=1, NotChecked=0, Total=1980 [2023-02-15 12:39:52,118 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:52,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 508 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:39:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 12:39:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2023-02-15 12:39:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.082191780821918) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (45), 30 states have call predecessors, (45), 10 states have call successors, (45) [2023-02-15 12:39:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2023-02-15 12:39:52,122 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 74 [2023-02-15 12:39:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:52,123 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2023-02-15 12:39:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 20 states have internal predecessors, (56), 8 states have call successors, (9), 1 states have call predecessors, (9), 11 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 12:39:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2023-02-15 12:39:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:39:52,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:52,123 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:52,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-15 12:39:52,331 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1410533388, now seen corresponding path program 23 times [2023-02-15 12:39:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:52,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439519599] [2023-02-15 12:39:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:52,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:39:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:39:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:39:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 12:39:52,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439519599] [2023-02-15 12:39:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439519599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324695643] [2023-02-15 12:39:52,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:39:52,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:52,748 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:52,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-15 12:39:53,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 12:39:53,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:53,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:39:53,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 12:39:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:19,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324695643] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:19,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:40:19,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2023-02-15 12:40:19,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843233640] [2023-02-15 12:40:19,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:19,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 12:40:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 12:40:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2664, Unknown=12, NotChecked=0, Total=2862 [2023-02-15 12:40:19,273 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand has 38 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 28 states have internal predecessors, (69), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-15 12:40:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:19,912 INFO L93 Difference]: Finished difference Result 159 states and 212 transitions. [2023-02-15 12:40:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:40:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 28 states have internal predecessors, (69), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 74 [2023-02-15 12:40:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:19,913 INFO L225 Difference]: With dead ends: 159 [2023-02-15 12:40:19,913 INFO L226 Difference]: Without dead ends: 155 [2023-02-15 12:40:19,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=383, Invalid=4027, Unknown=12, NotChecked=0, Total=4422 [2023-02-15 12:40:19,914 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:19,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 500 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:40:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-15 12:40:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 96. [2023-02-15 12:40:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (39), 25 states have call predecessors, (39), 10 states have call successors, (39) [2023-02-15 12:40:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2023-02-15 12:40:19,919 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 74 [2023-02-15 12:40:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:19,919 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2023-02-15 12:40:19,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 28 states have internal predecessors, (69), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-15 12:40:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2023-02-15 12:40:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:40:19,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:19,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:19,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-15 12:40:20,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:20,120 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -437615564, now seen corresponding path program 24 times [2023-02-15 12:40:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:20,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807883808] [2023-02-15 12:40:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:40:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 12:40:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807883808] [2023-02-15 12:40:20,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807883808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205966848] [2023-02-15 12:40:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:40:20,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:20,529 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:20,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-15 12:40:20,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 12:40:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:40:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 12:40:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:40:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 12:40:21,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:40:23,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205966848] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:40:23,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:40:23,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 27] total 47 [2023-02-15 12:40:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891470131] [2023-02-15 12:40:23,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 12:40:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 12:40:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 12:40:23,698 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand has 47 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 38 states have internal predecessors, (98), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (25), 13 states have call predecessors, (25), 19 states have call successors, (25) [2023-02-15 12:40:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:24,506 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2023-02-15 12:40:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 12:40:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 38 states have internal predecessors, (98), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (25), 13 states have call predecessors, (25), 19 states have call successors, (25) Word has length 74 [2023-02-15 12:40:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:24,507 INFO L225 Difference]: With dead ends: 174 [2023-02-15 12:40:24,508 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 12:40:24,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=445, Invalid=3587, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 12:40:24,508 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:24,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 696 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:40:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 12:40:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2023-02-15 12:40:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 76 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 24 states have return successors, (53), 32 states have call predecessors, (53), 10 states have call successors, (53) [2023-02-15 12:40:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2023-02-15 12:40:24,514 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 74 [2023-02-15 12:40:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:24,514 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2023-02-15 12:40:24,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 38 states have internal predecessors, (98), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (25), 13 states have call predecessors, (25), 19 states have call successors, (25) [2023-02-15 12:40:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2023-02-15 12:40:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:40:24,515 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:24,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:24,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-15 12:40:24,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:24,722 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1425316748, now seen corresponding path program 25 times [2023-02-15 12:40:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:24,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528468804] [2023-02-15 12:40:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:24,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:24,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:24,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:25,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:40:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:25,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:25,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-15 12:40:25,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:25,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528468804] [2023-02-15 12:40:25,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528468804] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:25,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118146709] [2023-02-15 12:40:25,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:40:25,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:25,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:25,134 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:25,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-15 12:40:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:40:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:40:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 12:40:25,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:34,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118146709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:34,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:40:34,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2023-02-15 12:40:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408951772] [2023-02-15 12:40:34,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:34,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 12:40:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 12:40:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1741, Unknown=2, NotChecked=0, Total=1892 [2023-02-15 12:40:34,090 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 35 states, 32 states have (on average 2.09375) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2023-02-15 12:40:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:34,817 INFO L93 Difference]: Finished difference Result 183 states and 246 transitions. [2023-02-15 12:40:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:40:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.09375) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) Word has length 74 [2023-02-15 12:40:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:34,818 INFO L225 Difference]: With dead ends: 183 [2023-02-15 12:40:34,818 INFO L226 Difference]: Without dead ends: 179 [2023-02-15 12:40:34,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=353, Invalid=2951, Unknown=2, NotChecked=0, Total=3306 [2023-02-15 12:40:34,819 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 70 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:34,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 573 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:40:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-15 12:40:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 119. [2023-02-15 12:40:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 80 states have internal predecessors, (88), 10 states have call successors, (10), 4 states have call predecessors, (10), 26 states have return successors, (58), 34 states have call predecessors, (58), 10 states have call successors, (58) [2023-02-15 12:40:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2023-02-15 12:40:34,825 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 74 [2023-02-15 12:40:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:34,825 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2023-02-15 12:40:34,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.09375) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2023-02-15 12:40:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2023-02-15 12:40:34,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:40:34,826 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:34,826 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:34,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-15 12:40:35,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-15 12:40:35,033 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2059083156, now seen corresponding path program 26 times [2023-02-15 12:40:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:35,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128217838] [2023-02-15 12:40:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:40:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 12:40:35,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128217838] [2023-02-15 12:40:35,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128217838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974912707] [2023-02-15 12:40:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:40:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:35,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:35,513 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:35,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-15 12:40:35,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:40:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:40:35,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:40:35,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:40:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 12:40:36,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:40:38,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974912707] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:40:38,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:40:38,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 50 [2023-02-15 12:40:38,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356802758] [2023-02-15 12:40:38,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:38,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 12:40:38,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 12:40:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 12:40:38,942 INFO L87 Difference]: Start difference. First operand 119 states and 156 transitions. Second operand has 50 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 39 states have internal predecessors, (100), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (25), 15 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 12:40:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:39,873 INFO L93 Difference]: Finished difference Result 207 states and 283 transitions. [2023-02-15 12:40:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 12:40:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 39 states have internal predecessors, (100), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (25), 15 states have call predecessors, (25), 18 states have call successors, (25) Word has length 74 [2023-02-15 12:40:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:39,875 INFO L225 Difference]: With dead ends: 207 [2023-02-15 12:40:39,875 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 12:40:39,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 122 SyntacticMatches, 13 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=497, Invalid=4195, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 12:40:39,876 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:39,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 991 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:40:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 12:40:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 112. [2023-02-15 12:40:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 24 states have return successors, (53), 31 states have call predecessors, (53), 10 states have call successors, (53) [2023-02-15 12:40:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2023-02-15 12:40:39,883 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 74 [2023-02-15 12:40:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:39,883 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2023-02-15 12:40:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 39 states have internal predecessors, (100), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (25), 15 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 12:40:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2023-02-15 12:40:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:40:39,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:39,884 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:39,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-15 12:40:40,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-15 12:40:40,091 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1262966316, now seen corresponding path program 27 times [2023-02-15 12:40:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:40,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131354451] [2023-02-15 12:40:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:40:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:40:40,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131354451] [2023-02-15 12:40:40,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131354451] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333969388] [2023-02-15 12:40:40,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:40:40,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:40,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:40,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:40,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-15 12:40:40,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 12:40:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:40:40,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 12:40:40,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:40:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 12:40:41,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 12:40:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333969388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:40:43,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:40:43,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 37 [2023-02-15 12:40:43,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546367502] [2023-02-15 12:40:43,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:43,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 12:40:43,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 12:40:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 12:40:43,244 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 29 states have internal predecessors, (87), 14 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-15 12:40:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:43,788 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2023-02-15 12:40:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:40:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 29 states have internal predecessors, (87), 14 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) Word has length 74 [2023-02-15 12:40:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:43,790 INFO L225 Difference]: With dead ends: 154 [2023-02-15 12:40:43,790 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 12:40:43,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 12:40:43,790 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 588 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:40:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 12:40:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 124. [2023-02-15 12:40:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 28 states have return successors, (64), 35 states have call predecessors, (64), 10 states have call successors, (64) [2023-02-15 12:40:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2023-02-15 12:40:43,796 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 74 [2023-02-15 12:40:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:43,796 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2023-02-15 12:40:43,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 29 states have internal predecessors, (87), 14 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-15 12:40:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2023-02-15 12:40:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 12:40:43,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:43,797 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:43,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-02-15 12:40:44,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 12:40:44,004 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash 256823296, now seen corresponding path program 28 times [2023-02-15 12:40:44,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:44,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661763355] [2023-02-15 12:40:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:44,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 12:40:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 12:40:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:44,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661763355] [2023-02-15 12:40:44,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661763355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152386522] [2023-02-15 12:40:44,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:40:44,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:44,498 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:44,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-15 12:40:45,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:40:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:40:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 12:40:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:40:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 12:40:45,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 3 proven. 109 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 12:40:49,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152386522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:40:49,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:40:49,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 30] total 62 [2023-02-15 12:40:49,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487296547] [2023-02-15 12:40:49,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:49,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 12:40:49,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:49,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 12:40:49,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3588, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 12:40:49,420 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 62 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 44 states have internal predecessors, (116), 21 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2023-02-15 12:40:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:50,496 INFO L93 Difference]: Finished difference Result 185 states and 243 transitions. [2023-02-15 12:40:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 12:40:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 44 states have internal predecessors, (116), 21 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) Word has length 82 [2023-02-15 12:40:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:50,521 INFO L225 Difference]: With dead ends: 185 [2023-02-15 12:40:50,521 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 12:40:50,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=527, Invalid=6115, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 12:40:50,523 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:50,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1064 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:40:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 12:40:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 114. [2023-02-15 12:40:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 78 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (55), 31 states have call predecessors, (55), 10 states have call successors, (55) [2023-02-15 12:40:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2023-02-15 12:40:50,529 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 82 [2023-02-15 12:40:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:50,529 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2023-02-15 12:40:50,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 44 states have internal predecessors, (116), 21 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2023-02-15 12:40:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2023-02-15 12:40:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 12:40:50,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:50,530 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:50,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-15 12:40:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 12:40:50,731 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1271964480, now seen corresponding path program 29 times [2023-02-15 12:40:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:50,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481852430] [2023-02-15 12:40:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:50,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:50,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:50,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 12:40:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 24 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 12:40:51,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481852430] [2023-02-15 12:40:51,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481852430] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189459139] [2023-02-15 12:40:51,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:40:51,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:51,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:51,373 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:51,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-15 12:40:51,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 12:40:51,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:40:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 12:40:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:40:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 12:40:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:40:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189459139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:57,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:40:57,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 43 [2023-02-15 12:40:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528768811] [2023-02-15 12:40:57,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:40:57,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 12:40:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:40:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 12:40:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2874, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 12:40:57,573 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand has 43 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 31 states have internal predecessors, (74), 13 states have call successors, (15), 1 states have call predecessors, (15), 15 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2023-02-15 12:40:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:40:58,898 INFO L93 Difference]: Finished difference Result 204 states and 280 transitions. [2023-02-15 12:40:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 12:40:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 31 states have internal predecessors, (74), 13 states have call successors, (15), 1 states have call predecessors, (15), 15 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) Word has length 82 [2023-02-15 12:40:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:40:58,899 INFO L225 Difference]: With dead ends: 204 [2023-02-15 12:40:58,900 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 12:40:58,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=651, Invalid=5669, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 12:40:58,901 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:40:58,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 647 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:40:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 12:40:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 90. [2023-02-15 12:40:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 10 states have call successors, (10), 4 states have call predecessors, (10), 17 states have return successors, (34), 23 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-15 12:40:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2023-02-15 12:40:58,908 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 82 [2023-02-15 12:40:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:40:58,908 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2023-02-15 12:40:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 31 states have internal predecessors, (74), 13 states have call successors, (15), 1 states have call predecessors, (15), 15 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2023-02-15 12:40:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2023-02-15 12:40:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 12:40:58,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:40:58,909 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:40:58,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-15 12:40:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:59,118 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:40:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:40:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1935481248, now seen corresponding path program 30 times [2023-02-15 12:40:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:40:59,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943331877] [2023-02-15 12:40:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:40:59,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:40:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:40:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:40:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 12:40:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:40:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:40:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 12:40:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:40:59,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943331877] [2023-02-15 12:40:59,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943331877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:40:59,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262061721] [2023-02-15 12:40:59,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:40:59,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:40:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:40:59,653 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:40:59,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-15 12:41:00,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-15 12:41:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 12:41:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:41:00,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 3 proven. 109 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 12:41:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262061721] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:41:03,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:41:03,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 30] total 53 [2023-02-15 12:41:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784020539] [2023-02-15 12:41:03,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:03,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 12:41:03,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 12:41:03,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2578, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 12:41:03,780 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 53 states, 48 states have (on average 2.25) internal successors, (108), 40 states have internal predecessors, (108), 20 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-15 12:41:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:04,719 INFO L93 Difference]: Finished difference Result 160 states and 208 transitions. [2023-02-15 12:41:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 12:41:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 2.25) internal successors, (108), 40 states have internal predecessors, (108), 20 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) Word has length 82 [2023-02-15 12:41:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:04,721 INFO L225 Difference]: With dead ends: 160 [2023-02-15 12:41:04,721 INFO L226 Difference]: Without dead ends: 156 [2023-02-15 12:41:04,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 137 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=575, Invalid=4827, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 12:41:04,722 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:04,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 917 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:41:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-15 12:41:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 72. [2023-02-15 12:41:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-15 12:41:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-15 12:41:04,726 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 82 [2023-02-15 12:41:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:04,726 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-15 12:41:04,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 2.25) internal successors, (108), 40 states have internal predecessors, (108), 20 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-15 12:41:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-15 12:41:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 12:41:04,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:04,727 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:04,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-02-15 12:41:04,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 12:41:04,934 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -152078404, now seen corresponding path program 9 times [2023-02-15 12:41:04,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:04,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356473995] [2023-02-15 12:41:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:04,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:41:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 12:41:05,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356473995] [2023-02-15 12:41:05,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356473995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344144081] [2023-02-15 12:41:05,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:41:05,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:05,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:05,347 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:05,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-15 12:41:05,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 12:41:05,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:41:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 12:41:06,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:07,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344144081] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:07,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:41:07,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 35 [2023-02-15 12:41:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738250791] [2023-02-15 12:41:07,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:07,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 12:41:07,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 12:41:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:41:07,745 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 27 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-15 12:41:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:08,260 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2023-02-15 12:41:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:41:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 27 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) Word has length 73 [2023-02-15 12:41:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:08,261 INFO L225 Difference]: With dead ends: 98 [2023-02-15 12:41:08,261 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 12:41:08,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=2662, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 12:41:08,262 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:08,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 578 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:41:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 12:41:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-02-15 12:41:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (25), 17 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-15 12:41:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2023-02-15 12:41:08,265 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 73 [2023-02-15 12:41:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:08,266 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2023-02-15 12:41:08,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 27 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-15 12:41:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2023-02-15 12:41:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 12:41:08,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:08,266 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:08,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-15 12:41:08,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:08,474 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash 867896604, now seen corresponding path program 31 times [2023-02-15 12:41:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546057365] [2023-02-15 12:41:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:41:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:41:08,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:08,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546057365] [2023-02-15 12:41:08,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546057365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:08,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204125354] [2023-02-15 12:41:08,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:41:08,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:08,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:08,840 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:08,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-15 12:41:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 12:41:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:41:09,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:41:11,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204125354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:41:11,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:41:11,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 36 [2023-02-15 12:41:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518756546] [2023-02-15 12:41:11,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:11,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:41:11,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:41:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:41:11,895 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 12:41:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:12,339 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2023-02-15 12:41:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:41:12,340 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-02-15 12:41:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:12,340 INFO L225 Difference]: With dead ends: 108 [2023-02-15 12:41:12,341 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 12:41:12,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 12:41:12,346 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:12,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 588 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:41:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 12:41:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2023-02-15 12:41:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 17 states have return successors, (32), 21 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-15 12:41:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-15 12:41:12,364 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 73 [2023-02-15 12:41:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:12,365 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-15 12:41:12,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 12:41:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-15 12:41:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 12:41:12,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:12,365 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:12,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-15 12:41:12,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-15 12:41:12,578 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1057895076, now seen corresponding path program 32 times [2023-02-15 12:41:12,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:12,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411423485] [2023-02-15 12:41:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:12,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:41:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:41:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:12,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411423485] [2023-02-15 12:41:12,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411423485] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:12,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151910540] [2023-02-15 12:41:12,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:41:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:12,978 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:12,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-15 12:41:13,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:41:13,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:13,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 12:41:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:41:13,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:41:15,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151910540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:41:15,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:41:15,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 36 [2023-02-15 12:41:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306218738] [2023-02-15 12:41:15,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:41:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:41:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:41:15,512 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 12:41:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:15,902 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2023-02-15 12:41:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:41:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-02-15 12:41:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:15,903 INFO L225 Difference]: With dead ends: 116 [2023-02-15 12:41:15,903 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 12:41:15,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 12:41:15,904 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:15,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 588 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:41:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 12:41:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2023-02-15 12:41:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 64 states have internal predecessors, (69), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (34), 23 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-15 12:41:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2023-02-15 12:41:15,909 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 73 [2023-02-15 12:41:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:15,909 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2023-02-15 12:41:15,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 12:41:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2023-02-15 12:41:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 12:41:15,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:15,910 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:15,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-15 12:41:16,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:16,119 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash -37920068, now seen corresponding path program 33 times [2023-02-15 12:41:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:16,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141069377] [2023-02-15 12:41:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:41:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 12:41:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141069377] [2023-02-15 12:41:16,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141069377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993526199] [2023-02-15 12:41:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:41:16,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:16,622 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:16,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-15 12:41:17,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 12:41:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:41:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 12:41:17,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:41:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993526199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:41:19,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:41:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 26] total 47 [2023-02-15 12:41:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509408162] [2023-02-15 12:41:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 12:41:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 12:41:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 12:41:19,523 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 12:41:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:20,138 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-02-15 12:41:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:41:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 73 [2023-02-15 12:41:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:20,139 INFO L225 Difference]: With dead ends: 116 [2023-02-15 12:41:20,139 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 12:41:20,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 122 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=3185, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 12:41:20,140 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:20,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 609 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:41:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 12:41:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2023-02-15 12:41:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (36), 25 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-15 12:41:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2023-02-15 12:41:20,144 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 73 [2023-02-15 12:41:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:20,144 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2023-02-15 12:41:20,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 12:41:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2023-02-15 12:41:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 12:41:20,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:20,145 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:20,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-15 12:41:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:20,345 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash -368383512, now seen corresponding path program 10 times [2023-02-15 12:41:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:20,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055666774] [2023-02-15 12:41:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:41:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 12:41:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055666774] [2023-02-15 12:41:20,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055666774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530670778] [2023-02-15 12:41:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:41:20,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:20,797 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:20,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-15 12:41:21,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:41:21,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-15 12:41:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 12:41:21,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:23,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530670778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:23,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:41:23,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2023-02-15 12:41:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673659880] [2023-02-15 12:41:23,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:23,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 12:41:23,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 12:41:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 12:41:23,715 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 23 states have internal predecessors, (60), 8 states have call successors, (8), 1 states have call predecessors, (8), 14 states have return successors, (18), 13 states have call predecessors, (18), 8 states have call successors, (18) [2023-02-15 12:41:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:24,079 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2023-02-15 12:41:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:41:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 23 states have internal predecessors, (60), 8 states have call successors, (8), 1 states have call predecessors, (8), 14 states have return successors, (18), 13 states have call predecessors, (18), 8 states have call successors, (18) Word has length 81 [2023-02-15 12:41:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:24,081 INFO L225 Difference]: With dead ends: 126 [2023-02-15 12:41:24,081 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 12:41:24,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 12:41:24,082 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 48 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:24,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 607 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:41:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 12:41:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2023-02-15 12:41:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (38), 25 states have call predecessors, (38), 10 states have call successors, (38) [2023-02-15 12:41:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-02-15 12:41:24,114 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 81 [2023-02-15 12:41:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:24,115 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-02-15 12:41:24,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 23 states have internal predecessors, (60), 8 states have call successors, (8), 1 states have call predecessors, (8), 14 states have return successors, (18), 13 states have call predecessors, (18), 8 states have call successors, (18) [2023-02-15 12:41:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-02-15 12:41:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 12:41:24,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:24,116 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:24,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-15 12:41:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-15 12:41:24,323 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:24,323 INFO L85 PathProgramCache]: Analyzing trace with hash -336766392, now seen corresponding path program 34 times [2023-02-15 12:41:24,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:24,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141094945] [2023-02-15 12:41:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:41:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 12:41:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141094945] [2023-02-15 12:41:24,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141094945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131420108] [2023-02-15 12:41:24,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:41:24,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:24,846 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:24,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-15 12:41:25,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:41:25,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:25,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 12:41:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 12:41:26,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:41:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 12:41:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131420108] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:41:28,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:41:28,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 27] total 49 [2023-02-15 12:41:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223771549] [2023-02-15 12:41:28,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:41:28,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 12:41:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:41:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 12:41:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 12:41:28,818 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 18 states have call successors, (20), 1 states have call predecessors, (20), 14 states have return successors, (28), 16 states have call predecessors, (28), 18 states have call successors, (28) [2023-02-15 12:41:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:41:29,694 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2023-02-15 12:41:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:41:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 18 states have call successors, (20), 1 states have call predecessors, (20), 14 states have return successors, (28), 16 states have call predecessors, (28), 18 states have call successors, (28) Word has length 81 [2023-02-15 12:41:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:41:29,695 INFO L225 Difference]: With dead ends: 120 [2023-02-15 12:41:29,695 INFO L226 Difference]: Without dead ends: 111 [2023-02-15 12:41:29,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 138 SyntacticMatches, 15 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=368, Invalid=3538, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 12:41:29,696 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:41:29,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 830 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:41:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-15 12:41:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2023-02-15 12:41:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (36), 25 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-15 12:41:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2023-02-15 12:41:29,700 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 81 [2023-02-15 12:41:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:41:29,700 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2023-02-15 12:41:29,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 18 states have call successors, (20), 1 states have call predecessors, (20), 14 states have return successors, (28), 16 states have call predecessors, (28), 18 states have call successors, (28) [2023-02-15 12:41:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2023-02-15 12:41:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 12:41:29,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:41:29,701 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:41:29,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-15 12:41:29,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-15 12:41:29,911 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:41:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:41:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -810209656, now seen corresponding path program 35 times [2023-02-15 12:41:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:41:29,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707055398] [2023-02-15 12:41:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:41:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:41:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 12:41:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:41:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 12:41:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:41:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:41:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 12:41:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:41:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707055398] [2023-02-15 12:41:30,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707055398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:41:30,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260531494] [2023-02-15 12:41:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:41:30,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:41:30,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:41:30,391 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:41:30,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-15 12:41:31,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 12:41:31,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:41:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 12:41:31,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:41:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 12:41:31,498 INFO L328 TraceCheckSpWp]: Computing backward predicates...