./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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-scaling/hard2_unwindbound10.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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:06:13,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:06:13,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:06:13,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:06:13,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:06:13,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:06:13,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:06:13,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:06:13,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:06:13,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:06:13,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:06:13,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:06:13,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:06:13,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:06:13,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:06:13,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:06:13,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:06:13,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:06:13,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:06:13,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:06:13,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:06:13,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:06:13,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:06:13,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:06:13,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:06:13,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:06:13,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:06:13,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:06:13,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:06:13,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:06:13,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:06:13,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:06:13,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:06:13,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:06:13,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:06:13,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:06:13,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:06:13,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:06:13,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:06:13,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:06:13,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:06:13,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:06:13,444 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:06:13,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:06:13,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:06:13,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:06:13,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:06:13,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:06:13,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:06:13,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:06:13,448 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:06:13,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:06:13,449 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:06:13,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:06:13,450 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:06:13,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:06:13,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:06:13,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:06:13,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:06:13,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:06:13,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:06:13,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:06:13,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:06:13,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:06:13,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:06:13,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:06:13,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:06:13,452 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:06:13,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:06:13,452 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:06:13,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2023-02-15 21:06:13,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:06:13,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:06:13,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:06:13,651 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:06:13,652 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:06:13,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2023-02-15 21:06:14,578 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:06:14,706 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:06:14,707 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2023-02-15 21:06:14,712 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cf9382f7/8b9c3593977840d9a2f3349e94bdae8f/FLAG8e9561a71 [2023-02-15 21:06:14,726 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cf9382f7/8b9c3593977840d9a2f3349e94bdae8f [2023-02-15 21:06:14,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:06:14,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:06:14,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:06:14,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:06:14,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:06:14,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe3a1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14, skipping insertion in model container [2023-02-15 21:06:14,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:06:14,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:06:14,862 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-scaling/hard2_unwindbound10.c[526,539] [2023-02-15 21:06:14,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:06:14,889 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:06:14,899 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-scaling/hard2_unwindbound10.c[526,539] [2023-02-15 21:06:14,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:06:14,912 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:06:14,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14 WrapperNode [2023-02-15 21:06:14,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:06:14,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:06:14,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:06:14,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:06:14,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,936 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-15 21:06:14,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:06:14,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:06:14,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:06:14,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:06:14,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:06:14,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:06:14,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:06:14,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:06:14,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (1/1) ... [2023-02-15 21:06:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:06:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:14,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 21:06:14,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 21:06:14,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:06:14,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:06:14,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:06:14,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:06:14,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 21:06:14,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 21:06:15,033 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:06:15,034 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:06:15,122 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:06:15,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:06:15,126 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 21:06:15,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:06:15 BoogieIcfgContainer [2023-02-15 21:06:15,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:06:15,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:06:15,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:06:15,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:06:15,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:06:14" (1/3) ... [2023-02-15 21:06:15,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff110f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:06:15, skipping insertion in model container [2023-02-15 21:06:15,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:14" (2/3) ... [2023-02-15 21:06:15,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff110f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:06:15, skipping insertion in model container [2023-02-15 21:06:15,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:06:15" (3/3) ... [2023-02-15 21:06:15,133 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2023-02-15 21:06:15,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:06:15,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:06:15,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:06:15,175 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;@1d14b003, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:06:15,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:06:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2023-02-15 21:06:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 21:06:15,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:15,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:15,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-15 21:06:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:15,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727929326] [2023-02-15 21:06:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:15,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:15,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727929326] [2023-02-15 21:06:15,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:06:15,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788092347] [2023-02-15 21:06:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:15,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:15,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:15,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:15,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:06:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 21:06:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:15,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:06:15,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788092347] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:15,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:15,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:06:15,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846661714] [2023-02-15 21:06:15,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:06:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:06:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:06:15,412 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:15,426 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-15 21:06:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:06:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2023-02-15 21:06:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:15,433 INFO L225 Difference]: With dead ends: 50 [2023-02-15 21:06:15,433 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 21:06:15,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:06:15,438 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:15,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 21:06:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 21:06:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:06:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-15 21:06:15,467 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-15 21:06:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:15,468 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-15 21:06:15,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-15 21:06:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 21:06:15,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:15,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:15,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 21:06:15,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-15 21:06:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:15,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270174295] [2023-02-15 21:06:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:15,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270174295] [2023-02-15 21:06:15,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270174295] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:15,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:15,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:06:15,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978959242] [2023-02-15 21:06:15,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:06:15,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:06:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:06:15,812 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:15,856 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-15 21:06:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:06:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2023-02-15 21:06:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:15,858 INFO L225 Difference]: With dead ends: 36 [2023-02-15 21:06:15,858 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 21:06:15,859 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 [2023-02-15 21:06:15,860 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:15,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 21:06:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-15 21:06:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2023-02-15 21:06:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-15 21:06:15,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-15 21:06:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:15,866 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-15 21:06:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-15 21:06:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:06:15,867 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:15,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:15,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:06:15,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-15 21:06:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:15,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75083055] [2023-02-15 21:06:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:15,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75083055] [2023-02-15 21:06:15,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:06:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152623206] [2023-02-15 21:06:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:15,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:15,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:06:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 21:06:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:15,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:06:15,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152623206] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:15,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:15,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:06:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602036261] [2023-02-15 21:06:15,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:06:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:06:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:06:15,979 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:15,998 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-15 21:06:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:06:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-02-15 21:06:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:15,999 INFO L225 Difference]: With dead ends: 42 [2023-02-15 21:06:15,999 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 21:06:15,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:06:16,000 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:16,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 21:06:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 21:06:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-02-15 21:06:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 21:06:16,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-15 21:06:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:16,006 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 21:06:16,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 21:06:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 21:06:16,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:16,007 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:16,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:16,215 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,SelfDestructingSolverStorable2 [2023-02-15 21:06:16,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-15 21:06:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453226247] [2023-02-15 21:06:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:06:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:16,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453226247] [2023-02-15 21:06:16,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453226247] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:16,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:16,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:06:16,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520389495] [2023-02-15 21:06:16,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:16,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:06:16,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:16,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:06:16,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:06:16,324 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-02-15 21:06:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:16,376 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-15 21:06:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:06:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2023-02-15 21:06:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:16,378 INFO L225 Difference]: With dead ends: 42 [2023-02-15 21:06:16,378 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 21:06:16,378 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 [2023-02-15 21:06:16,380 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 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 [2023-02-15 21:06:16,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 21:06:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-15 21:06:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-02-15 21:06:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-15 21:06:16,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-15 21:06:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:16,389 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-15 21:06:16,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-02-15 21:06:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-15 21:06:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 21:06:16,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:16,390 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:16,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:06:16,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-15 21:06:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:16,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828282831] [2023-02-15 21:06:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:16,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:16,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734016849] [2023-02-15 21:06:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:16,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:16,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:16,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:06:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:16,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 21:06:16,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:06:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:06:16,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828282831] [2023-02-15 21:06:16,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:16,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734016849] [2023-02-15 21:06:16,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734016849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:16,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:16,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 21:06:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295787099] [2023-02-15 21:06:16,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:06:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:06:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:06:16,680 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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) [2023-02-15 21:06:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:16,980 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-15 21:06:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:06:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 18 [2023-02-15 21:06:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:16,982 INFO L225 Difference]: With dead ends: 71 [2023-02-15 21:06:16,983 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 21:06:16,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:06:16,984 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:16,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:06:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 21:06:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-15 21:06:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 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) [2023-02-15 21:06:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-15 21:06:16,992 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-15 21:06:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:16,992 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-15 21:06:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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) [2023-02-15 21:06:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-15 21:06:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:06:16,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:16,993 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:17,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:17,201 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 [2023-02-15 21:06:17,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-15 21:06:17,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:17,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625391149] [2023-02-15 21:06:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:17,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:17,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835226249] [2023-02-15 21:06:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:17,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:06:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:06:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:06:17,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:06:17,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:17,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625391149] [2023-02-15 21:06:17,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:17,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835226249] [2023-02-15 21:06:17,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835226249] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:17,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:17,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-15 21:06:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989166254] [2023-02-15 21:06:17,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:17,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:06:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:06:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:06:17,425 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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) [2023-02-15 21:06:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:17,531 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-15 21:06:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:06:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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 26 [2023-02-15 21:06:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:17,533 INFO L225 Difference]: With dead ends: 73 [2023-02-15 21:06:17,533 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 21:06:17,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:06:17,534 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:17,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:06:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 21:06:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-15 21:06:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 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) [2023-02-15 21:06:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-15 21:06:17,542 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-15 21:06:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:17,542 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-15 21:06:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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) [2023-02-15 21:06:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-15 21:06:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 21:06:17,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:17,543 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:17,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:17,748 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 [2023-02-15 21:06:17,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-15 21:06:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:17,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855243269] [2023-02-15 21:06:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:17,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:17,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339245947] [2023-02-15 21:06:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:17,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:17,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:17,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:06:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 21:06:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 21:06:17,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 21:06:17,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:17,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855243269] [2023-02-15 21:06:17,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:17,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339245947] [2023-02-15 21:06:17,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339245947] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:17,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:17,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 21:06:17,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866627895] [2023-02-15 21:06:17,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:17,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:06:17,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:06:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:06:17,883 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 21:06:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:17,956 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-15 21:06:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:06:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-15 21:06:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:17,957 INFO L225 Difference]: With dead ends: 165 [2023-02-15 21:06:17,957 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 21:06:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:06:17,958 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:17,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 21:06:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-15 21:06:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-15 21:06:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-15 21:06:17,971 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-15 21:06:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:17,971 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-15 21:06:17,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 21:06:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-15 21:06:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 21:06:17,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:17,973 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:17,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:18,179 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 [2023-02-15 21:06:18,180 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-15 21:06:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466490956] [2023-02-15 21:06:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:18,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:18,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144974460] [2023-02-15 21:06:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:18,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:18,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:18,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:06:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:18,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 21:06:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:06:18,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-15 21:06:18,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:18,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466490956] [2023-02-15 21:06:18,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:18,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144974460] [2023-02-15 21:06:18,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144974460] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:18,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:18,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 21:06:18,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986058119] [2023-02-15 21:06:18,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:18,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:06:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:06:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:06:18,333 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 21:06:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:18,442 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-15 21:06:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:06:18,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-15 21:06:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:18,444 INFO L225 Difference]: With dead ends: 249 [2023-02-15 21:06:18,444 INFO L226 Difference]: Without dead ends: 228 [2023-02-15 21:06:18,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:06:18,445 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:18,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:06:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-15 21:06:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-15 21:06:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 21:06:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-15 21:06:18,465 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-15 21:06:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:18,465 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-15 21:06:18,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 21:06:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-15 21:06:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:06:18,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:18,467 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:18,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 21:06:18,671 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 [2023-02-15 21:06:18,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-15 21:06:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916028414] [2023-02-15 21:06:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:18,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:18,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289560897] [2023-02-15 21:06:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:18,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:18,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:18,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:18,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:06:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 21:06:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 21:06:18,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 21:06:19,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:19,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916028414] [2023-02-15 21:06:19,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:19,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289560897] [2023-02-15 21:06:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289560897] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:19,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:19,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-15 21:06:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990024388] [2023-02-15 21:06:19,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:06:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:06:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:06:19,685 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2023-02-15 21:06:26,009 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:06:28,050 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 [] [2023-02-15 21:06:30,380 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 [] [2023-02-15 21:06:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:30,950 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-15 21:06:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:06:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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 58 [2023-02-15 21:06:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:30,953 INFO L225 Difference]: With dead ends: 372 [2023-02-15 21:06:30,953 INFO L226 Difference]: Without dead ends: 299 [2023-02-15 21:06:30,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:06:30,954 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 94 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:30,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 359 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 21:06:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-15 21:06:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-15 21:06:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-15 21:06:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-15 21:06:31,007 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-15 21:06:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:31,007 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-15 21:06:31,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2023-02-15 21:06:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-15 21:06:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 21:06:31,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:31,009 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:31,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:31,209 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 [2023-02-15 21:06:31,210 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-15 21:06:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052070343] [2023-02-15 21:06:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:31,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:31,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985178342] [2023-02-15 21:06:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:31,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:31,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:31,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:31,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:06:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:31,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:06:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 21:06:31,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 21:06:31,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052070343] [2023-02-15 21:06:31,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:31,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985178342] [2023-02-15 21:06:31,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985178342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:31,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:31,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-15 21:06:31,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478290184] [2023-02-15 21:06:31,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:31,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:06:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:31,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:06:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:06:31,833 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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) [2023-02-15 21:06:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:32,489 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-15 21:06:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:06:32,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 69 [2023-02-15 21:06:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:32,491 INFO L225 Difference]: With dead ends: 341 [2023-02-15 21:06:32,491 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 21:06:32,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:06:32,492 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:32,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:06:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 21:06:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-15 21:06:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-15 21:06:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-15 21:06:32,527 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-15 21:06:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:32,527 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-15 21:06:32,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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) [2023-02-15 21:06:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-15 21:06:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:06:32,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:32,528 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:32,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:06:32,733 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 [2023-02-15 21:06:32,733 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-15 21:06:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:32,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196395686] [2023-02-15 21:06:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:32,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:32,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860568657] [2023-02-15 21:06:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:32,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:32,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:32,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:32,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:06:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:06:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-15 21:06:32,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-15 21:06:33,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196395686] [2023-02-15 21:06:33,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860568657] [2023-02-15 21:06:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860568657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:33,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-15 21:06:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299394116] [2023-02-15 21:06:33,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:06:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:06:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:06:33,110 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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) [2023-02-15 21:06:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:33,348 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2023-02-15 21:06:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:06:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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 74 [2023-02-15 21:06:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:33,351 INFO L225 Difference]: With dead ends: 263 [2023-02-15 21:06:33,351 INFO L226 Difference]: Without dead ends: 218 [2023-02-15 21:06:33,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:06:33,352 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:33,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 273 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:06:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-15 21:06:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-02-15 21:06:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-15 21:06:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2023-02-15 21:06:33,384 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2023-02-15 21:06:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:33,384 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2023-02-15 21:06:33,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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) [2023-02-15 21:06:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2023-02-15 21:06:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-15 21:06:33,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:33,387 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 21:06:33,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 21:06:33,591 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 [2023-02-15 21:06:33,592 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-15 21:06:33,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:33,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183242049] [2023-02-15 21:06:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:33,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:33,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:33,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345708141] [2023-02-15 21:06:33,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:06:33,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:33,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:06:33,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:06:33,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:06:33,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:06:33,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:06:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 21:06:33,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 21:06:54,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183242049] [2023-02-15 21:06:54,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345708141] [2023-02-15 21:06:54,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345708141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:54,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:54,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-15 21:06:54,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047961847] [2023-02-15 21:06:54,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:54,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:06:54,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:54,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:06:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:06:54,949 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 21:07:18,264 WARN L233 SmtUtils]: Spent 22.21s on a formula simplification. DAG size of input: 172 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:07:22,596 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 [] [2023-02-15 21:07:23,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:30,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:32,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:34,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:34,135 INFO L93 Difference]: Finished difference Result 309 states and 397 transitions. [2023-02-15 21:07:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:07:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2023-02-15 21:07:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:34,137 INFO L225 Difference]: With dead ends: 309 [2023-02-15 21:07:34,137 INFO L226 Difference]: Without dead ends: 259 [2023-02-15 21:07:34,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:07:34,137 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 104 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 162 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:34,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 350 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1150 Invalid, 3 Unknown, 0 Unchecked, 14.6s Time] [2023-02-15 21:07:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-15 21:07:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 246. [2023-02-15 21:07:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 174 states have internal predecessors, (200), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-15 21:07:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2023-02-15 21:07:34,203 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 90 [2023-02-15 21:07:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:34,204 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2023-02-15 21:07:34,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 21:07:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2023-02-15 21:07:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 21:07:34,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:34,205 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:07:34,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 21:07:34,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 21:07:34,410 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-15 21:07:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:34,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162923664] [2023-02-15 21:07:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:34,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:34,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737629315] [2023-02-15 21:07:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:34,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:34,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:34,418 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:07:34,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 21:07:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:07:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 21:07:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-15 21:07:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-15 21:07:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162923664] [2023-02-15 21:07:34,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737629315] [2023-02-15 21:07:34,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737629315] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:34,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:34,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 21:07:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383666037] [2023-02-15 21:07:34,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:07:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:07:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:07:34,662 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 21:07:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:35,055 INFO L93 Difference]: Finished difference Result 703 states and 939 transitions. [2023-02-15 21:07:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:07:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-15 21:07:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:35,057 INFO L225 Difference]: With dead ends: 703 [2023-02-15 21:07:35,057 INFO L226 Difference]: Without dead ends: 628 [2023-02-15 21:07:35,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:07:35,058 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 161 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:35,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 300 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:07:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-02-15 21:07:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 543. [2023-02-15 21:07:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 386 states have internal predecessors, (461), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-15 21:07:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 718 transitions. [2023-02-15 21:07:35,198 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 718 transitions. Word has length 96 [2023-02-15 21:07:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:35,198 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 718 transitions. [2023-02-15 21:07:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 21:07:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 718 transitions. [2023-02-15 21:07:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 21:07:35,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:35,199 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:07:35,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 21:07:35,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 21:07:35,404 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-15 21:07:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:35,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507889208] [2023-02-15 21:07:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:35,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:35,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:35,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285950500] [2023-02-15 21:07:35,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:07:35,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:35,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:35,412 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:07:35,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 21:07:35,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:07:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:07:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 21:07:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 21:07:35,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 21:07:44,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507889208] [2023-02-15 21:07:44,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285950500] [2023-02-15 21:07:44,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285950500] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:44,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:44,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-15 21:07:44,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854493371] [2023-02-15 21:07:44,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:44,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:07:44,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:44,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:07:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:07:44,085 INFO L87 Difference]: Start difference. First operand 543 states and 718 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 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) [2023-02-15 21:07:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:53,166 INFO L93 Difference]: Finished difference Result 674 states and 887 transitions. [2023-02-15 21:07:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:07:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 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 101 [2023-02-15 21:07:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:53,169 INFO L225 Difference]: With dead ends: 674 [2023-02-15 21:07:53,169 INFO L226 Difference]: Without dead ends: 546 [2023-02-15 21:07:53,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-02-15 21:07:53,171 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:53,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 211 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-02-15 21:07:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-15 21:07:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 498. [2023-02-15 21:07:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 330 states have (on average 1.2333333333333334) internal successors, (407), 352 states have internal predecessors, (407), 114 states have call successors, (114), 53 states have call predecessors, (114), 53 states have return successors, (111), 92 states have call predecessors, (111), 111 states have call successors, (111) [2023-02-15 21:07:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 632 transitions. [2023-02-15 21:07:53,329 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 632 transitions. Word has length 101 [2023-02-15 21:07:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:53,329 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 632 transitions. [2023-02-15 21:07:53,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 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) [2023-02-15 21:07:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 632 transitions. [2023-02-15 21:07:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 21:07:53,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:53,330 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:07:53,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 21:07:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 21:07:53,535 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-15 21:07:53,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:53,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676961716] [2023-02-15 21:07:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:53,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824593511] [2023-02-15 21:07:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:53,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:53,542 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:07:53,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 21:07:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:07:53,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 21:07:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 21:07:53,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-15 21:07:53,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676961716] [2023-02-15 21:07:53,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824593511] [2023-02-15 21:07:53,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824593511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:53,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:53,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2023-02-15 21:07:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886854237] [2023-02-15 21:07:53,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:53,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:07:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:07:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:07:53,796 INFO L87 Difference]: Start difference. First operand 498 states and 632 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-15 21:07:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:54,147 INFO L93 Difference]: Finished difference Result 619 states and 782 transitions. [2023-02-15 21:07:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:07:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 104 [2023-02-15 21:07:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:54,149 INFO L225 Difference]: With dead ends: 619 [2023-02-15 21:07:54,149 INFO L226 Difference]: Without dead ends: 580 [2023-02-15 21:07:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:07:54,150 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 105 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:54,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 334 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:07:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-02-15 21:07:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 564. [2023-02-15 21:07:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 380 states have (on average 1.1605263157894736) internal successors, (441), 400 states have internal predecessors, (441), 127 states have call successors, (127), 57 states have call predecessors, (127), 56 states have return successors, (123), 106 states have call predecessors, (123), 123 states have call successors, (123) [2023-02-15 21:07:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 691 transitions. [2023-02-15 21:07:54,311 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 691 transitions. Word has length 104 [2023-02-15 21:07:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:54,311 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 691 transitions. [2023-02-15 21:07:54,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-15 21:07:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 691 transitions. [2023-02-15 21:07:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-15 21:07:54,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:54,312 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:07:54,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 21:07:54,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 21:07:54,513 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:54,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2023-02-15 21:07:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:54,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934235256] [2023-02-15 21:07:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:54,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697853156] [2023-02-15 21:07:54,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:07:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:54,519 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:07:54,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 21:07:54,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:07:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:07:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 21:07:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 21:07:54,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 21:07:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934235256] [2023-02-15 21:07:56,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697853156] [2023-02-15 21:07:56,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697853156] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:56,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:56,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-02-15 21:07:56,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304738599] [2023-02-15 21:07:56,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:56,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 21:07:56,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 21:07:56,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-02-15 21:07:56,402 INFO L87 Difference]: Start difference. First operand 564 states and 691 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 23 states have internal predecessors, (56), 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) [2023-02-15 21:07:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:57,479 INFO L93 Difference]: Finished difference Result 704 states and 870 transitions. [2023-02-15 21:07:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:07:57,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 23 states have internal predecessors, (56), 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 106 [2023-02-15 21:07:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:57,481 INFO L225 Difference]: With dead ends: 704 [2023-02-15 21:07:57,481 INFO L226 Difference]: Without dead ends: 547 [2023-02-15 21:07:57,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:07:57,482 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:57,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 283 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:07:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-02-15 21:07:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 511. [2023-02-15 21:07:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 344 states have (on average 1.1627906976744187) internal successors, (400), 363 states have internal predecessors, (400), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (110), 94 states have call predecessors, (110), 110 states have call successors, (110) [2023-02-15 21:07:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 624 transitions. [2023-02-15 21:07:57,646 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 624 transitions. Word has length 106 [2023-02-15 21:07:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:57,647 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 624 transitions. [2023-02-15 21:07:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 23 states have internal predecessors, (56), 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) [2023-02-15 21:07:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 624 transitions. [2023-02-15 21:07:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-15 21:07:57,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:57,648 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-15 21:07:57,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 21:07:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:57,852 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-15 21:07:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:57,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841849626] [2023-02-15 21:07:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:57,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:57,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176359146] [2023-02-15 21:07:57,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:07:57,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:57,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:07:57,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 21:07:57,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:07:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:07:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 21:07:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-15 21:07:58,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:04,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841849626] [2023-02-15 21:08:04,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176359146] [2023-02-15 21:08:04,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176359146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:08:04,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:08:04,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 21:08:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961717172] [2023-02-15 21:08:04,061 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:04,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:08:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:08:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:08:04,062 INFO L87 Difference]: Start difference. First operand 511 states and 624 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 21:08:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:04,344 INFO L93 Difference]: Finished difference Result 549 states and 661 transitions. [2023-02-15 21:08:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:08:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2023-02-15 21:08:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:04,346 INFO L225 Difference]: With dead ends: 549 [2023-02-15 21:08:04,346 INFO L226 Difference]: Without dead ends: 547 [2023-02-15 21:08:04,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:08:04,347 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:04,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:08:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-02-15 21:08:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 501. [2023-02-15 21:08:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 341 states have (on average 1.1583577712609971) internal successors, (395), 356 states have internal predecessors, (395), 108 states have call successors, (108), 52 states have call predecessors, (108), 51 states have return successors, (106), 92 states have call predecessors, (106), 106 states have call successors, (106) [2023-02-15 21:08:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 609 transitions. [2023-02-15 21:08:04,499 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 609 transitions. Word has length 122 [2023-02-15 21:08:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:04,500 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 609 transitions. [2023-02-15 21:08:04,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 21:08:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 609 transitions. [2023-02-15 21:08:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 21:08:04,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:04,501 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 21:08:04,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 21:08:04,706 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash -507902292, now seen corresponding path program 3 times [2023-02-15 21:08:04,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:04,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697580967] [2023-02-15 21:08:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:04,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:04,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:04,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506424779] [2023-02-15 21:08:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:08:04,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:04,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:08:04,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 21:08:04,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:08:04,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 21:08:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 107 proven. 55 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-02-15 21:08:04,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-02-15 21:08:04,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697580967] [2023-02-15 21:08:04,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506424779] [2023-02-15 21:08:04,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506424779] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:04,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:04,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 21:08:04,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956456555] [2023-02-15 21:08:04,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:04,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:08:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:08:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:08:04,978 INFO L87 Difference]: Start difference. First operand 501 states and 609 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:05,319 INFO L93 Difference]: Finished difference Result 563 states and 662 transitions. [2023-02-15 21:08:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:08:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 124 [2023-02-15 21:08:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:05,321 INFO L225 Difference]: With dead ends: 563 [2023-02-15 21:08:05,322 INFO L226 Difference]: Without dead ends: 543 [2023-02-15 21:08:05,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:08:05,322 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:05,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 101 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:08:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-02-15 21:08:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 542. [2023-02-15 21:08:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 372 states have (on average 1.1236559139784945) internal successors, (418), 388 states have internal predecessors, (418), 107 states have call successors, (107), 62 states have call predecessors, (107), 62 states have return successors, (105), 91 states have call predecessors, (105), 105 states have call successors, (105) [2023-02-15 21:08:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 630 transitions. [2023-02-15 21:08:05,477 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 630 transitions. Word has length 124 [2023-02-15 21:08:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:05,478 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 630 transitions. [2023-02-15 21:08:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 630 transitions. [2023-02-15 21:08:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-15 21:08:05,479 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:05,479 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:05,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 21:08:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 21:08:05,683 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:05,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-15 21:08:05,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647199572] [2023-02-15 21:08:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:05,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:05,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069413208] [2023-02-15 21:08:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:08:05,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:05,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:05,690 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:08:05,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 21:08:05,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:08:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 21:08:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-15 21:08:05,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-15 21:08:06,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647199572] [2023-02-15 21:08:06,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069413208] [2023-02-15 21:08:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069413208] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:06,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:06,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-15 21:08:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309947420] [2023-02-15 21:08:06,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:06,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:08:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:08:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:08:06,018 INFO L87 Difference]: Start difference. First operand 542 states and 630 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:06,447 INFO L93 Difference]: Finished difference Result 549 states and 636 transitions. [2023-02-15 21:08:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:08:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2023-02-15 21:08:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:06,465 INFO L225 Difference]: With dead ends: 549 [2023-02-15 21:08:06,465 INFO L226 Difference]: Without dead ends: 542 [2023-02-15 21:08:06,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:08:06,466 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:06,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 82 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:08:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-02-15 21:08:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 367. [2023-02-15 21:08:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 249 states have (on average 1.0963855421686748) internal successors, (273), 260 states have internal predecessors, (273), 69 states have call successors, (69), 48 states have call predecessors, (69), 48 states have return successors, (68), 58 states have call predecessors, (68), 68 states have call successors, (68) [2023-02-15 21:08:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 410 transitions. [2023-02-15 21:08:06,609 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 410 transitions. Word has length 133 [2023-02-15 21:08:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:06,609 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 410 transitions. [2023-02-15 21:08:06,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 410 transitions. [2023-02-15 21:08:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-15 21:08:06,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:06,611 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:06,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 21:08:06,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:06,816 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1705968445, now seen corresponding path program 1 times [2023-02-15 21:08:06,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:06,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606851394] [2023-02-15 21:08:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:06,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:06,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:06,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131410988] [2023-02-15 21:08:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:06,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:06,834 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:08:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 21:08:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:08:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 21:08:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-02-15 21:08:07,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2023-02-15 21:08:09,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606851394] [2023-02-15 21:08:09,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131410988] [2023-02-15 21:08:09,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131410988] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:09,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:09,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-02-15 21:08:09,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834806904] [2023-02-15 21:08:09,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 21:08:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 21:08:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:08:09,145 INFO L87 Difference]: Start difference. First operand 367 states and 410 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2023-02-15 21:08:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:10,013 INFO L93 Difference]: Finished difference Result 483 states and 559 transitions. [2023-02-15 21:08:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:08:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) Word has length 164 [2023-02-15 21:08:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:10,015 INFO L225 Difference]: With dead ends: 483 [2023-02-15 21:08:10,015 INFO L226 Difference]: Without dead ends: 350 [2023-02-15 21:08:10,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-02-15 21:08:10,016 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 27 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:10,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 534 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:08:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-02-15 21:08:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 336. [2023-02-15 21:08:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 228 states have (on average 1.0921052631578947) internal successors, (249), 237 states have internal predecessors, (249), 62 states have call successors, (62), 45 states have call predecessors, (62), 45 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2023-02-15 21:08:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 372 transitions. [2023-02-15 21:08:10,145 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 372 transitions. Word has length 164 [2023-02-15 21:08:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:10,145 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 372 transitions. [2023-02-15 21:08:10,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2023-02-15 21:08:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 372 transitions. [2023-02-15 21:08:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-15 21:08:10,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:10,148 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:10,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 21:08:10,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:10,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1021836698, now seen corresponding path program 2 times [2023-02-15 21:08:10,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486656498] [2023-02-15 21:08:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:10,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:10,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:10,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490285082] [2023-02-15 21:08:10,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:08:10,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:10,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:10,361 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:08:10,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 21:08:10,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:08:10,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 21:08:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-02-15 21:08:10,746 INFO L328 TraceCheckSpWp]: Computing backward predicates...