./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/nla-digbench/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:40:44,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:40:44,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:40:44,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:40:44,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:40:44,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:40:44,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:40:44,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:40:44,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:40:44,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:40:44,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:40:44,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:40:44,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:40:44,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:40:44,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:40:44,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:40:44,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:40:44,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:40:44,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:40:44,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:40:44,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:40:44,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:40:44,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:40:44,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:40:44,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:40:44,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:40:44,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:40:44,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:40:44,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:40:44,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:40:44,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:40:44,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:40:44,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:40:44,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:40:44,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:40:44,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:40:44,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:40:44,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:40:44,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:40:44,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:40:44,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:40:44,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:40:44,516 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:40:44,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:40:44,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:40:44,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:40:44,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:40:44,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:40:44,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:40:44,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:40:44,518 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:40:44,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:40:44,518 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:40:44,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:40:44,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:40:44,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:40:44,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:40:44,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:40:44,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:40:44,519 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:40:44,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:40:44,519 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:40:44,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:40:44,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:40:44,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:40:44,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:40:44,521 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:40:44,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:40:44,521 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:40:44,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:40:44,521 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:40:44,521 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2023-02-16 01:40:44,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:40:44,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:40:44,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:40:44,745 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:40:44,745 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:40:44,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard2.c [2023-02-16 01:40:45,857 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:40:46,037 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:40:46,037 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2023-02-16 01:40:46,044 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cea7238/624129c91ba64ff2b900106787a57318/FLAG185909d52 [2023-02-16 01:40:46,059 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0cea7238/624129c91ba64ff2b900106787a57318 [2023-02-16 01:40:46,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:40:46,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:40:46,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:40:46,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:40:46,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:40:46,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5262e632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46, skipping insertion in model container [2023-02-16 01:40:46,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:40:46,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:40:46,217 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c[526,539] [2023-02-16 01:40:46,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:40:46,248 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:40:46,261 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c[526,539] [2023-02-16 01:40:46,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:40:46,288 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:40:46,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46 WrapperNode [2023-02-16 01:40:46,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:40:46,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:40:46,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:40:46,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:40:46,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,322 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-02-16 01:40:46,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:40:46,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:40:46,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:40:46,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:40:46,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,358 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:40:46,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:40:46,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:40:46,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:40:46,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (1/1) ... [2023-02-16 01:40:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:40:46,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:46,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 01:40:46,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 01:40:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:40:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:40:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:40:46,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:40:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 01:40:46,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 01:40:46,482 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:40:46,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:40:46,601 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:40:46,606 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:40:46,606 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 01:40:46,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:40:46 BoogieIcfgContainer [2023-02-16 01:40:46,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:40:46,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:40:46,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:40:46,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:40:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:40:46" (1/3) ... [2023-02-16 01:40:46,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7994e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:40:46, skipping insertion in model container [2023-02-16 01:40:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:40:46" (2/3) ... [2023-02-16 01:40:46,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7994e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:40:46, skipping insertion in model container [2023-02-16 01:40:46,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:40:46" (3/3) ... [2023-02-16 01:40:46,615 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2023-02-16 01:40:46,630 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:40:46,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:40:46,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:40:46,685 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@508c34d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:40:46,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:40:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 01:40:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 01:40:46,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:46,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:46,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1812186719, now seen corresponding path program 1 times [2023-02-16 01:40:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:46,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212713078] [2023-02-16 01:40:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:46,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:40:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212713078] [2023-02-16 01:40:46,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212713078] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:40:46,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:40:46,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 01:40:47,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511424565] [2023-02-16 01:40:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:40:47,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:40:47,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:40:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:40:47,050 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:40:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:47,166 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2023-02-16 01:40:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:40:47,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 01:40:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:47,174 INFO L225 Difference]: With dead ends: 61 [2023-02-16 01:40:47,175 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 01:40:47,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:40:47,193 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:47,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:40:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 01:40:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-02-16 01:40:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 01:40:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-02-16 01:40:47,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2023-02-16 01:40:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:47,229 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-02-16 01:40:47,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:40:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-02-16 01:40:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 01:40:47,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:47,231 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:47,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:40:47,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash 876512919, now seen corresponding path program 1 times [2023-02-16 01:40:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:47,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035073361] [2023-02-16 01:40:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:47,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:47,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 01:40:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:40:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035073361] [2023-02-16 01:40:47,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035073361] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:40:47,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:40:47,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 01:40:47,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299499912] [2023-02-16 01:40:47,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:40:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:40:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:40:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:40:47,383 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 01:40:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:47,453 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-02-16 01:40:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:40:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-16 01:40:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:47,455 INFO L225 Difference]: With dead ends: 37 [2023-02-16 01:40:47,455 INFO L226 Difference]: Without dead ends: 35 [2023-02-16 01:40:47,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:40:47,457 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:47,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:40:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-16 01:40:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-16 01:40:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 01:40:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-16 01:40:47,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2023-02-16 01:40:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:47,466 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-16 01:40:47,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 01:40:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-16 01:40:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 01:40:47,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:47,467 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:40:47,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2107096801, now seen corresponding path program 1 times [2023-02-16 01:40:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166288] [2023-02-16 01:40:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:47,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:40:47,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468513950] [2023-02-16 01:40:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:47,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:47,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:47,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:40:47,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:40:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 01:40:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:40:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:40:47,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:40:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:40:47,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:47,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166288] [2023-02-16 01:40:47,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:40:47,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468513950] [2023-02-16 01:40:47,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468513950] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:40:47,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:40:47,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:40:47,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816078103] [2023-02-16 01:40:47,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:40:47,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:40:47,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:40:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:40:47,882 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:40:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:48,085 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2023-02-16 01:40:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:40:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-02-16 01:40:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:48,088 INFO L225 Difference]: With dead ends: 63 [2023-02-16 01:40:48,089 INFO L226 Difference]: Without dead ends: 49 [2023-02-16 01:40:48,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:40:48,090 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:48,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:40:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-16 01:40:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-16 01:40:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-16 01:40:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-16 01:40:48,103 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 17 [2023-02-16 01:40:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:48,103 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-16 01:40:48,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:40:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-16 01:40:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 01:40:48,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:48,104 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:48,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 01:40:48,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:48,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2032872060, now seen corresponding path program 1 times [2023-02-16 01:40:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:48,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965478238] [2023-02-16 01:40:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:48,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:40:48,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340059923] [2023-02-16 01:40:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:48,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:48,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:48,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:40:48,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:40:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 01:40:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:40:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:40:48,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:40:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:40:48,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:48,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965478238] [2023-02-16 01:40:48,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:40:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340059923] [2023-02-16 01:40:48,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340059923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:40:48,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:40:48,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-16 01:40:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609612210] [2023-02-16 01:40:48,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:40:48,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 01:40:48,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 01:40:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:40:48,561 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-16 01:40:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:48,673 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-02-16 01:40:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:40:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 24 [2023-02-16 01:40:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:48,675 INFO L225 Difference]: With dead ends: 64 [2023-02-16 01:40:48,675 INFO L226 Difference]: Without dead ends: 57 [2023-02-16 01:40:48,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:40:48,677 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:48,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 43 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:40:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-16 01:40:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-02-16 01:40:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 37 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 01:40:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-02-16 01:40:48,689 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 24 [2023-02-16 01:40:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:48,689 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-02-16 01:40:48,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-16 01:40:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-02-16 01:40:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-16 01:40:48,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:48,691 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:48,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:40:48,896 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 [2023-02-16 01:40:48,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1409666923, now seen corresponding path program 1 times [2023-02-16 01:40:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:48,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498610653] [2023-02-16 01:40:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:48,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:40:48,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819911000] [2023-02-16 01:40:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:48,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:40:48,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:40:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:48,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 01:40:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:40:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-16 01:40:49,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:40:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-16 01:40:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498610653] [2023-02-16 01:40:49,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:40:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819911000] [2023-02-16 01:40:49,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819911000] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:40:49,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:40:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-16 01:40:49,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574596150] [2023-02-16 01:40:49,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:40:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:40:49,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:40:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:40:49,853 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-16 01:40:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:52,687 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2023-02-16 01:40:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:40:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2023-02-16 01:40:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:52,692 INFO L225 Difference]: With dead ends: 140 [2023-02-16 01:40:52,692 INFO L226 Difference]: Without dead ends: 109 [2023-02-16 01:40:52,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:40:52,695 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:52,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 77 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 01:40:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-16 01:40:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-02-16 01:40:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 69 states have internal predecessors, (75), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 24 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-16 01:40:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2023-02-16 01:40:52,734 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 54 [2023-02-16 01:40:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:52,735 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2023-02-16 01:40:52,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-16 01:40:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2023-02-16 01:40:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-16 01:40:52,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:52,737 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:52,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:40:52,937 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 [2023-02-16 01:40:52,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash 135028242, now seen corresponding path program 1 times [2023-02-16 01:40:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:52,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718612013] [2023-02-16 01:40:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:52,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:52,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:40:52,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618554661] [2023-02-16 01:40:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:52,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:52,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:52,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:40:52,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:40:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:53,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 01:40:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:40:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-16 01:40:53,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:40:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-16 01:40:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718612013] [2023-02-16 01:40:53,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:40:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618554661] [2023-02-16 01:40:53,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618554661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:40:53,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:40:53,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-16 01:40:53,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091467424] [2023-02-16 01:40:53,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:40:53,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 01:40:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 01:40:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:40:53,664 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-16 01:40:55,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:40:57,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:40:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:57,345 INFO L93 Difference]: Finished difference Result 159 states and 208 transitions. [2023-02-16 01:40:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 01:40:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 65 [2023-02-16 01:40:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:57,347 INFO L225 Difference]: With dead ends: 159 [2023-02-16 01:40:57,347 INFO L226 Difference]: Without dead ends: 121 [2023-02-16 01:40:57,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:40:57,348 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:57,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 84 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-02-16 01:40:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-16 01:40:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2023-02-16 01:40:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 64 states have internal predecessors, (70), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-16 01:40:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2023-02-16 01:40:57,380 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 65 [2023-02-16 01:40:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:57,381 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2023-02-16 01:40:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-16 01:40:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2023-02-16 01:40:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-16 01:40:57,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:57,387 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:40:57,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 01:40:57,592 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 [2023-02-16 01:40:57,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1157546620, now seen corresponding path program 1 times [2023-02-16 01:40:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722327047] [2023-02-16 01:40:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:57,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:40:57,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81016129] [2023-02-16 01:40:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:57,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:40:57,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:40:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:40:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 01:40:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:40:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-16 01:40:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:40:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-16 01:40:58,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:40:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722327047] [2023-02-16 01:40:58,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:40:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81016129] [2023-02-16 01:40:58,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81016129] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:40:58,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:40:58,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-16 01:40:58,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7389589] [2023-02-16 01:40:58,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:40:58,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:40:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:40:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:40:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:40:58,064 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-16 01:40:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:40:58,352 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2023-02-16 01:40:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:40:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 70 [2023-02-16 01:40:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:40:58,354 INFO L225 Difference]: With dead ends: 118 [2023-02-16 01:40:58,354 INFO L226 Difference]: Without dead ends: 91 [2023-02-16 01:40:58,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:40:58,355 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:40:58,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 205 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:40:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-16 01:40:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-16 01:40:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-16 01:40:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-02-16 01:40:58,377 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 70 [2023-02-16 01:40:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:40:58,377 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-02-16 01:40:58,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-16 01:40:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-02-16 01:40:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-16 01:40:58,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:40:58,379 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 01:40:58,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 01:40:58,584 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 [2023-02-16 01:40:58,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:40:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:40:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2022890084, now seen corresponding path program 2 times [2023-02-16 01:40:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:40:58,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220295849] [2023-02-16 01:40:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:40:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:40:58,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:40:58,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099838659] [2023-02-16 01:40:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:40:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:40:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:40:58,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:40:58,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:40:58,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:40:58,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:40:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 01:40:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:40:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 01:40:59,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:41:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 01:41:21,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:41:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220295849] [2023-02-16 01:41:21,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:41:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099838659] [2023-02-16 01:41:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099838659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:41:21,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:41:21,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-02-16 01:41:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79279662] [2023-02-16 01:41:21,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:41:21,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-16 01:41:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:41:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-16 01:41:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-16 01:41:21,513 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-16 01:41:29,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:41:48,020 WARN L233 SmtUtils]: Spent 17.58s on a formula simplification. DAG size of input: 181 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:41:58,095 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 122 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:42:10,959 WARN L233 SmtUtils]: Spent 12.80s on a formula simplification. DAG size of input: 106 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:42:30,466 WARN L233 SmtUtils]: Spent 19.30s on a formula simplification. DAG size of input: 87 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:42:36,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:42:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:42:37,150 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2023-02-16 01:42:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 01:42:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 84 [2023-02-16 01:42:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:42:37,153 INFO L225 Difference]: With dead ends: 209 [2023-02-16 01:42:37,153 INFO L226 Difference]: Without dead ends: 170 [2023-02-16 01:42:37,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 72.4s TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 01:42:37,155 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 237 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-02-16 01:42:37,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 153 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 848 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2023-02-16 01:42:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-16 01:42:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2023-02-16 01:42:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 95 states have (on average 1.168421052631579) internal successors, (111), 100 states have internal predecessors, (111), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-16 01:42:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 194 transitions. [2023-02-16 01:42:37,222 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 194 transitions. Word has length 84 [2023-02-16 01:42:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:42:37,224 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 194 transitions. [2023-02-16 01:42:37,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-16 01:42:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 194 transitions. [2023-02-16 01:42:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-16 01:42:37,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:42:37,229 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 01:42:37,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 01:42:37,436 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 [2023-02-16 01:42:37,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:42:37,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:42:37,437 INFO L85 PathProgramCache]: Analyzing trace with hash -757369614, now seen corresponding path program 3 times [2023-02-16 01:42:37,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:42:37,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404414196] [2023-02-16 01:42:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:42:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:42:37,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:42:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864007080] [2023-02-16 01:42:37,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:42:37,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:42:37,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:42:37,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:42:37,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:42:37,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:42:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:42:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 01:42:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:42:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-16 01:42:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:42:44,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:42:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404414196] [2023-02-16 01:42:44,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:42:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864007080] [2023-02-16 01:42:44,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864007080] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:42:44,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:42:44,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-16 01:42:44,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839426974] [2023-02-16 01:42:44,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:42:44,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 01:42:44,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:42:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 01:42:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:42:44,185 INFO L87 Difference]: Start difference. First operand 154 states and 194 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-16 01:42:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:42:44,361 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2023-02-16 01:42:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:42:44,361 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 89 [2023-02-16 01:42:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:42:44,363 INFO L225 Difference]: With dead ends: 169 [2023-02-16 01:42:44,363 INFO L226 Difference]: Without dead ends: 167 [2023-02-16 01:42:44,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:42:44,364 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:42:44,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:42:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-16 01:42:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2023-02-16 01:42:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 109 states have internal predecessors, (120), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-16 01:42:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 203 transitions. [2023-02-16 01:42:44,424 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 203 transitions. Word has length 89 [2023-02-16 01:42:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:42:44,424 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 203 transitions. [2023-02-16 01:42:44,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-16 01:42:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 203 transitions. [2023-02-16 01:42:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-16 01:42:44,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:42:44,426 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:42:44,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:42:44,635 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 [2023-02-16 01:42:44,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:42:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:42:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -442569351, now seen corresponding path program 2 times [2023-02-16 01:42:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:42:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786831425] [2023-02-16 01:42:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:42:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:42:44,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:42:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947887151] [2023-02-16 01:42:44,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:42:44,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:42:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:42:44,652 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:42:44,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:42:44,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:42:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:42:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 01:42:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:42:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-16 01:42:45,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:42:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-16 01:42:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:42:55,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786831425] [2023-02-16 01:42:55,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:42:55,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947887151] [2023-02-16 01:42:55,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947887151] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:42:55,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:42:55,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-16 01:42:55,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124553260] [2023-02-16 01:42:55,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:42:55,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 01:42:55,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:42:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 01:42:55,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:42:55,748 INFO L87 Difference]: Start difference. First operand 166 states and 203 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-16 01:43:04,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:43:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:43:04,111 INFO L93 Difference]: Finished difference Result 242 states and 304 transitions. [2023-02-16 01:43:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 01:43:04,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 95 [2023-02-16 01:43:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:43:04,117 INFO L225 Difference]: With dead ends: 242 [2023-02-16 01:43:04,117 INFO L226 Difference]: Without dead ends: 215 [2023-02-16 01:43:04,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 165 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2023-02-16 01:43:04,121 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:43:04,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 128 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 718 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2023-02-16 01:43:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-16 01:43:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 191. [2023-02-16 01:43:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 124 states have internal predecessors, (138), 52 states have call successors, (52), 20 states have call predecessors, (52), 20 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2023-02-16 01:43:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2023-02-16 01:43:04,207 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 95 [2023-02-16 01:43:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:43:04,207 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2023-02-16 01:43:04,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-16 01:43:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2023-02-16 01:43:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-16 01:43:04,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:43:04,209 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:43:04,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 01:43:04,414 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 [2023-02-16 01:43:04,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:43:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:43:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1030960765, now seen corresponding path program 2 times [2023-02-16 01:43:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:43:04,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369830897] [2023-02-16 01:43:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:43:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:43:04,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:43:04,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993931075] [2023-02-16 01:43:04,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:43:04,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:43:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:43:04,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:43:04,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:43:04,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:43:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:43:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 01:43:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:43:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-16 01:43:04,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:43:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-16 01:43:06,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:43:06,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369830897] [2023-02-16 01:43:06,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:43:06,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993931075] [2023-02-16 01:43:06,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993931075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:43:06,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:43:06,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-02-16 01:43:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69260980] [2023-02-16 01:43:06,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:43:06,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 01:43:06,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:43:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 01:43:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:43:06,417 INFO L87 Difference]: Start difference. First operand 191 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 23 states have internal predecessors, (44), 14 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2023-02-16 01:43:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:43:07,270 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2023-02-16 01:43:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 01:43:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 23 states have internal predecessors, (44), 14 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 100 [2023-02-16 01:43:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:43:07,273 INFO L225 Difference]: With dead ends: 251 [2023-02-16 01:43:07,273 INFO L226 Difference]: Without dead ends: 149 [2023-02-16 01:43:07,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 01:43:07,275 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:43:07,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 246 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:43:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-16 01:43:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2023-02-16 01:43:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 92 states have internal predecessors, (100), 36 states have call successors, (36), 17 states have call predecessors, (36), 17 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2023-02-16 01:43:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2023-02-16 01:43:07,355 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 100 [2023-02-16 01:43:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:43:07,356 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2023-02-16 01:43:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 23 states have internal predecessors, (44), 14 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2023-02-16 01:43:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2023-02-16 01:43:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-16 01:43:07,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:43:07,357 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 01:43:07,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:43:07,563 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 [2023-02-16 01:43:07,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:43:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:43:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2024814962, now seen corresponding path program 4 times [2023-02-16 01:43:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:43:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338824924] [2023-02-16 01:43:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:43:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:43:07,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:43:07,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112606317] [2023-02-16 01:43:07,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:43:07,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:43:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:43:07,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:43:07,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:43:07,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:43:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:43:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-16 01:43:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:43:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 159 proven. 77 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-16 01:43:24,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:43:57,859 WARN L233 SmtUtils]: Spent 16.19s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:44:44,633 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)