./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/loops-crafted-1/mono-crafted_6.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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:48:40,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:48:40,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:48:40,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:48:40,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:48:40,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:48:40,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:48:40,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:48:40,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:48:40,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:48:40,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:48:40,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:48:40,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:48:40,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:48:40,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:48:40,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:48:40,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:48:40,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:48:40,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:48:40,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:48:40,363 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:48:40,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:48:40,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:48:40,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:48:40,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:48:40,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:48:40,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:48:40,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:48:40,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:48:40,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:48:40,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:48:40,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:48:40,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:48:40,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:48:40,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:48:40,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:48:40,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:48:40,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:48:40,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:48:40,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:48:40,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:48:40,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:48:40,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:48:40,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:48:40,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:48:40,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:48:40,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:48:40,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:48:40,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:48:40,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:48:40,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:48:40,402 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:48:40,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:48:40,402 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:48:40,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:48:40,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:48:40,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:48:40,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:48:40,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:48:40,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:48:40,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:48:40,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:48:40,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:48:40,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:48:40,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:48:40,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:48:40,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:48:40,406 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:48:40,406 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:48:40,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:48:40,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2022-07-13 15:48:40,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:48:40,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:48:40,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:48:40,605 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:48:40,606 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:48:40,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2022-07-13 15:48:40,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286ca8145/ce7c7e95381c4b5c967ab3dd72dde9b2/FLAGf372fa37e [2022-07-13 15:48:40,962 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:48:40,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2022-07-13 15:48:40,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286ca8145/ce7c7e95381c4b5c967ab3dd72dde9b2/FLAGf372fa37e [2022-07-13 15:48:41,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286ca8145/ce7c7e95381c4b5c967ab3dd72dde9b2 [2022-07-13 15:48:41,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:48:41,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:48:41,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:48:41,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:48:41,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:48:41,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79acdad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41, skipping insertion in model container [2022-07-13 15:48:41,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:48:41,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:48:41,519 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2022-07-13 15:48:41,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:48:41,534 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:48:41,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2022-07-13 15:48:41,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:48:41,552 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:48:41,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41 WrapperNode [2022-07-13 15:48:41,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:48:41,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:48:41,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:48:41,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:48:41,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,573 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-07-13 15:48:41,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:48:41,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:48:41,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:48:41,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:48:41,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:48:41,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:48:41,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:48:41,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:48:41,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (1/1) ... [2022-07-13 15:48:41,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:48:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:41,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:48:41,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:48:41,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:48:41,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:48:41,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:48:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:48:41,674 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:48:41,675 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:48:41,740 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:48:41,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:48:41,744 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 15:48:41,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:48:41 BoogieIcfgContainer [2022-07-13 15:48:41,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:48:41,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:48:41,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:48:41,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:48:41,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:48:41" (1/3) ... [2022-07-13 15:48:41,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513c7724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:48:41, skipping insertion in model container [2022-07-13 15:48:41,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:48:41" (2/3) ... [2022-07-13 15:48:41,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513c7724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:48:41, skipping insertion in model container [2022-07-13 15:48:41,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:48:41" (3/3) ... [2022-07-13 15:48:41,759 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-07-13 15:48:41,768 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:48:41,770 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:48:41,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:48:41,807 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@baaf5dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@761db537 [2022-07-13 15:48:41,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:48:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-13 15:48:41,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:41,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-13 15:48:41,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:41,835 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2022-07-13 15:48:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:41,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146379457] [2022-07-13 15:48:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:48:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146379457] [2022-07-13 15:48:41,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146379457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:48:41,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:48:41,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:48:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937711826] [2022-07-13 15:48:41,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:48:41,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:48:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:48:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:48:42,027 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:42,063 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-07-13 15:48:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:48:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-13 15:48:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:42,069 INFO L225 Difference]: With dead ends: 28 [2022-07-13 15:48:42,083 INFO L226 Difference]: Without dead ends: 12 [2022-07-13 15:48:42,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:48:42,088 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:42,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:48:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-13 15:48:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-13 15:48:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-13 15:48:42,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-07-13 15:48:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:42,123 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-13 15:48:42,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-13 15:48:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 15:48:42,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:42,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:48:42,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2022-07-13 15:48:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:42,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455416593] [2022-07-13 15:48:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:48:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:42,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455416593] [2022-07-13 15:48:42,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455416593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:42,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072361584] [2022-07-13 15:48:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:42,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:42,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:48:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 15:48:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:48:42,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:48:42,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072361584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:42,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:42,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 15:48:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664930357] [2022-07-13 15:48:42,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:42,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 15:48:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 15:48:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:48:42,247 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:42,296 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-07-13 15:48:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:48:42,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 15:48:42,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:42,298 INFO L225 Difference]: With dead ends: 26 [2022-07-13 15:48:42,298 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 15:48:42,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:48:42,300 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:42,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:48:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 15:48:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-13 15:48:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-13 15:48:42,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-13 15:48:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:42,304 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-13 15:48:42,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-13 15:48:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 15:48:42,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:42,307 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:42,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 15:48:42,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:42,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2022-07-13 15:48:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823697040] [2022-07-13 15:48:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:48:42,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:42,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823697040] [2022-07-13 15:48:42,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823697040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:48:42,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:48:42,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:48:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407295355] [2022-07-13 15:48:42,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:48:42,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:48:42,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:48:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:48:42,557 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:42,574 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-13 15:48:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:48:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-13 15:48:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:42,575 INFO L225 Difference]: With dead ends: 29 [2022-07-13 15:48:42,575 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 15:48:42,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:48:42,577 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:42,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:48:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 15:48:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 15:48:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-13 15:48:42,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2022-07-13 15:48:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:42,585 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-13 15:48:42,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-13 15:48:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 15:48:42,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:42,586 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:42,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:48:42,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -894818322, now seen corresponding path program 1 times [2022-07-13 15:48:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349183336] [2022-07-13 15:48:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:42,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349183336] [2022-07-13 15:48:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349183336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600962855] [2022-07-13 15:48:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:42,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:42,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:42,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:48:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 15:48:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:42,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:42,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600962855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:42,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:42,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-13 15:48:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78717102] [2022-07-13 15:48:42,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:48:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:48:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:48:42,742 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:42,765 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-07-13 15:48:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:48:42,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 15:48:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:42,766 INFO L225 Difference]: With dead ends: 40 [2022-07-13 15:48:42,766 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 15:48:42,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:48:42,767 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:42,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:48:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 15:48:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 15:48:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-07-13 15:48:42,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-07-13 15:48:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:42,771 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-07-13 15:48:42,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-07-13 15:48:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:48:42,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:42,772 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:42,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:42,988 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,SelfDestructingSolverStorable3 [2022-07-13 15:48:42,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash 118887930, now seen corresponding path program 2 times [2022-07-13 15:48:42,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:42,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58846910] [2022-07-13 15:48:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:43,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58846910] [2022-07-13 15:48:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58846910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565993108] [2022-07-13 15:48:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:48:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:43,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:43,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:48:43,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:48:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:48:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 15:48:43,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:43,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:43,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565993108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:43,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:43,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-13 15:48:43,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788221882] [2022-07-13 15:48:43,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:43,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 15:48:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 15:48:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:48:43,259 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:43,314 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-07-13 15:48:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 15:48:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 15:48:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:43,315 INFO L225 Difference]: With dead ends: 56 [2022-07-13 15:48:43,315 INFO L226 Difference]: Without dead ends: 43 [2022-07-13 15:48:43,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:48:43,316 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:43,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:48:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-13 15:48:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-13 15:48:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-07-13 15:48:43,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2022-07-13 15:48:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:43,321 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-07-13 15:48:43,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-07-13 15:48:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 15:48:43,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:43,322 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:43,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 15:48:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:43,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -173044206, now seen corresponding path program 3 times [2022-07-13 15:48:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:43,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868596682] [2022-07-13 15:48:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:48:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868596682] [2022-07-13 15:48:43,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868596682] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002261531] [2022-07-13 15:48:43,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:48:43,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:43,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:43,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:48:43,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 15:48:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:48:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 15:48:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-13 15:48:43,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-13 15:48:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002261531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:43,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:43,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 21 [2022-07-13 15:48:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425297756] [2022-07-13 15:48:43,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:43,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 15:48:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 15:48:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-07-13 15:48:43,818 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:43,911 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-07-13 15:48:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 15:48:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-13 15:48:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:43,912 INFO L225 Difference]: With dead ends: 70 [2022-07-13 15:48:43,912 INFO L226 Difference]: Without dead ends: 57 [2022-07-13 15:48:43,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-07-13 15:48:43,913 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:43,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:48:43,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-13 15:48:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-13 15:48:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-07-13 15:48:43,928 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2022-07-13 15:48:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:43,928 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-07-13 15:48:43,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-07-13 15:48:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 15:48:43,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:43,929 INFO L195 NwaCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:43,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:44,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:44,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1187818742, now seen corresponding path program 4 times [2022-07-13 15:48:44,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:44,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558625994] [2022-07-13 15:48:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:44,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:48:44,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558625994] [2022-07-13 15:48:44,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558625994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296212255] [2022-07-13 15:48:44,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:48:44,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:44,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:44,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:44,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:48:44,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:48:44,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:48:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:48:44,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:48:44,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:48:44,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296212255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:44,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:44,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-07-13 15:48:44,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231363856] [2022-07-13 15:48:44,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:44,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 15:48:44,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 15:48:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 15:48:44,685 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:44,758 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-07-13 15:48:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 15:48:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-13 15:48:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:44,760 INFO L225 Difference]: With dead ends: 116 [2022-07-13 15:48:44,760 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 15:48:44,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 15:48:44,761 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:44,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:48:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 15:48:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-13 15:48:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-07-13 15:48:44,768 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 56 [2022-07-13 15:48:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:44,768 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-07-13 15:48:44,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-07-13 15:48:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 15:48:44,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:44,770 INFO L195 NwaCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:44,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:44,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1855342691, now seen corresponding path program 5 times [2022-07-13 15:48:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853711271] [2022-07-13 15:48:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:44,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:48:45,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:45,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853711271] [2022-07-13 15:48:45,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853711271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:45,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247659750] [2022-07-13 15:48:45,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:48:45,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:45,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:45,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:45,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:48:45,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-13 15:48:45,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:48:45,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:48:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-07-13 15:48:45,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-07-13 15:48:46,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247659750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:46,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:46,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2022-07-13 15:48:46,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669153780] [2022-07-13 15:48:46,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:46,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 15:48:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 15:48:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 15:48:46,449 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:46,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:46,701 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-07-13 15:48:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-13 15:48:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-13 15:48:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:46,703 INFO L225 Difference]: With dead ends: 234 [2022-07-13 15:48:46,703 INFO L226 Difference]: Without dead ends: 209 [2022-07-13 15:48:46,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 15:48:46,704 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:46,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 63 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:48:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-13 15:48:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-07-13 15:48:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1875) internal successors, (247), 208 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2022-07-13 15:48:46,715 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 90 [2022-07-13 15:48:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:46,715 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2022-07-13 15:48:46,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2022-07-13 15:48:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-13 15:48:46,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:46,717 INFO L195 NwaCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:46,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:46,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:46,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 960421829, now seen corresponding path program 6 times [2022-07-13 15:48:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519600863] [2022-07-13 15:48:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-07-13 15:48:47,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519600863] [2022-07-13 15:48:47,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519600863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632804220] [2022-07-13 15:48:47,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:48:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:47,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:47,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:48:47,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-13 15:48:47,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:48:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:48:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-07-13 15:48:47,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-07-13 15:48:47,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632804220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:47,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:47,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 46 [2022-07-13 15:48:47,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869689843] [2022-07-13 15:48:47,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:47,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 15:48:47,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 15:48:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 15:48:47,789 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:47,932 INFO L93 Difference]: Finished difference Result 376 states and 471 transitions. [2022-07-13 15:48:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 15:48:47,933 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-07-13 15:48:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:47,934 INFO L225 Difference]: With dead ends: 376 [2022-07-13 15:48:47,934 INFO L226 Difference]: Without dead ends: 235 [2022-07-13 15:48:47,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 15:48:47,939 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:47,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:48:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-13 15:48:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-07-13 15:48:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2179487179487178) internal successors, (285), 234 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2022-07-13 15:48:47,959 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 208 [2022-07-13 15:48:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:47,959 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2022-07-13 15:48:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2022-07-13 15:48:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-13 15:48:47,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:47,961 INFO L195 NwaCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:47,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:48,163 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1401661778, now seen corresponding path program 7 times [2022-07-13 15:48:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956881427] [2022-07-13 15:48:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:48:48,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:48,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956881427] [2022-07-13 15:48:48,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956881427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:48,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118116] [2022-07-13 15:48:48,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:48:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:48,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:48:48,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:48:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 15:48:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:48:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:48:50,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:50,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:50,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-07-13 15:48:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577240253] [2022-07-13 15:48:50,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-13 15:48:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-13 15:48:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 15:48:50,002 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:50,136 INFO L93 Difference]: Finished difference Result 472 states and 608 transitions. [2022-07-13 15:48:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-13 15:48:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-13 15:48:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:50,139 INFO L225 Difference]: With dead ends: 472 [2022-07-13 15:48:50,139 INFO L226 Difference]: Without dead ends: 307 [2022-07-13 15:48:50,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 15:48:50,141 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:50,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:48:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-13 15:48:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-07-13 15:48:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 306 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2022-07-13 15:48:50,152 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 234 [2022-07-13 15:48:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:50,154 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2022-07-13 15:48:50,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2022-07-13 15:48:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-13 15:48:50,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:50,161 INFO L195 NwaCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:50,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:50,371 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,SelfDestructingSolverStorable9 [2022-07-13 15:48:50,371 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1256502206, now seen corresponding path program 8 times [2022-07-13 15:48:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:50,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235255176] [2022-07-13 15:48:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:50,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:48:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:48:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:48:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235255176] [2022-07-13 15:48:51,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235255176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:48:51,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369894797] [2022-07-13 15:48:51,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:48:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:48:51,924 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) [2022-07-13 15:48:51,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:48:52,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:48:52,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:48:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-13 15:48:52,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:48:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:48:52,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:48:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:48:56,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369894797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:48:56,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:48:56,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 145 [2022-07-13 15:48:56,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40523611] [2022-07-13 15:48:56,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:48:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-07-13 15:48:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:48:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-07-13 15:48:56,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2022-07-13 15:48:56,398 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:48:56,750 INFO L93 Difference]: Finished difference Result 616 states and 788 transitions. [2022-07-13 15:48:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-13 15:48:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2022-07-13 15:48:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:48:56,752 INFO L225 Difference]: With dead ends: 616 [2022-07-13 15:48:56,752 INFO L226 Difference]: Without dead ends: 451 [2022-07-13 15:48:56,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2022-07-13 15:48:56,756 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:48:56,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:48:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-13 15:48:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2022-07-13 15:48:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1133333333333333) internal successors, (501), 450 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2022-07-13 15:48:56,765 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 306 [2022-07-13 15:48:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:48:56,766 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2022-07-13 15:48:56,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:48:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2022-07-13 15:48:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-07-13 15:48:56,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:48:56,770 INFO L195 NwaCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2022-07-13 15:48:56,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 15:48:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:48:56,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:48:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:48:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -932895594, now seen corresponding path program 9 times [2022-07-13 15:48:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:48:56,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417618795] [2022-07-13 15:48:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:48:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:48:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-07-13 15:49:02,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:02,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417618795] [2022-07-13 15:49:02,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417618795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:02,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146159885] [2022-07-13 15:49:02,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:49:02,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:02,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:02,647 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) [2022-07-13 15:49:02,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 15:49:02,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-13 15:49:02,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 15:49:02,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-07-13 15:49:03,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-07-13 15:49:04,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146159885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:04,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:04,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 13, 13] total 167 [2022-07-13 15:49:04,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788739319] [2022-07-13 15:49:04,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:04,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-07-13 15:49:04,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-07-13 15:49:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2022-07-13 15:49:04,607 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:05,508 INFO L93 Difference]: Finished difference Result 666 states and 803 transitions. [2022-07-13 15:49:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-07-13 15:49:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 450 [2022-07-13 15:49:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:05,512 INFO L225 Difference]: With dead ends: 666 [2022-07-13 15:49:05,512 INFO L226 Difference]: Without dead ends: 501 [2022-07-13 15:49:05,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2022-07-13 15:49:05,514 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 352 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:05,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 39 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1097 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:49:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-13 15:49:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-07-13 15:49:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.15) internal successors, (575), 500 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 575 transitions. [2022-07-13 15:49:05,525 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 575 transitions. Word has length 450 [2022-07-13 15:49:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:05,526 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 575 transitions. [2022-07-13 15:49:05,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 575 transitions. [2022-07-13 15:49:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-07-13 15:49:05,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:05,531 INFO L195 NwaCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:05,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 15:49:05,747 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,SelfDestructingSolverStorable11 [2022-07-13 15:49:05,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:05,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash -278359667, now seen corresponding path program 10 times [2022-07-13 15:49:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:05,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294474748] [2022-07-13 15:49:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-07-13 15:49:11,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294474748] [2022-07-13 15:49:11,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294474748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227037830] [2022-07-13 15:49:11,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:49:11,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:11,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:11,501 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) [2022-07-13 15:49:11,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 15:49:11,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:49:11,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-13 15:49:11,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:49:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-07-13 15:49:11,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:49:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-07-13 15:49:28,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227037830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:49:28,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:49:28,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146, 146] total 291 [2022-07-13 15:49:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150985888] [2022-07-13 15:49:28,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:49:28,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2022-07-13 15:49:28,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:49:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2022-07-13 15:49:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2022-07-13 15:49:28,537 INFO L87 Difference]: Start difference. First operand 501 states and 575 transitions. Second operand has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:49:29,538 INFO L93 Difference]: Finished difference Result 1004 states and 1297 transitions. [2022-07-13 15:49:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-13 15:49:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 500 [2022-07-13 15:49:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:49:29,541 INFO L225 Difference]: With dead ends: 1004 [2022-07-13 15:49:29,541 INFO L226 Difference]: Without dead ends: 791 [2022-07-13 15:49:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2022-07-13 15:49:29,545 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:49:29,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 15:49:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-13 15:49:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 791. [2022-07-13 15:49:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.0949367088607596) internal successors, (865), 790 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 865 transitions. [2022-07-13 15:49:29,585 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 865 transitions. Word has length 500 [2022-07-13 15:49:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:49:29,585 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 865 transitions. [2022-07-13 15:49:29,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:49:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 865 transitions. [2022-07-13 15:49:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-07-13 15:49:29,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:49:29,589 INFO L195 NwaCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2022-07-13 15:49:29,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 15:49:29,795 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,SelfDestructingSolverStorable12 [2022-07-13 15:49:29,795 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:49:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:49:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1077236000, now seen corresponding path program 11 times [2022-07-13 15:49:29,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:49:29,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469503881] [2022-07-13 15:49:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:49:29,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:49:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:49:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-07-13 15:49:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:49:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469503881] [2022-07-13 15:49:51,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469503881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:49:51,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577351301] [2022-07-13 15:49:51,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:49:51,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:49:51,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:49:51,916 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) [2022-07-13 15:49:51,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 15:49:52,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-07-13 15:49:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:49:52,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-13 15:49:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:50:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-07-13 15:50:21,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:51:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-07-13 15:51:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577351301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:51:03,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:51:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 151, 151] total 589 [2022-07-13 15:51:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759142481] [2022-07-13 15:51:03,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:51:03,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 589 states [2022-07-13 15:51:03,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:51:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 589 interpolants. [2022-07-13 15:51:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173166, Invalid=173166, Unknown=0, NotChecked=0, Total=346332 [2022-07-13 15:51:03,432 INFO L87 Difference]: Start difference. First operand 791 states and 865 transitions. Second operand has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)