./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 26d01a9c 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-?-26d01a9 [2023-02-17 02:05:47,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:05:47,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:05:47,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:05:47,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:05:47,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:05:47,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:05:47,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:05:47,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:05:47,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:05:47,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:05:47,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:05:47,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:05:47,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:05:47,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:05:47,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:05:47,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:05:47,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:05:47,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:05:47,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:05:47,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:05:47,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:05:47,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:05:47,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:05:47,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:05:47,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:05:47,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:05:47,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:05:47,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:05:47,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:05:47,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:05:47,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:05:47,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:05:47,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:05:47,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:05:47,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:05:47,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:05:47,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:05:47,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:05:47,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:05:47,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:05:47,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 02:05:47,438 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:05:47,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:05:47,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:05:47,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:05:47,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:05:47,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:05:47,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:05:47,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:05:47,442 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:05:47,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:05:47,442 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:05:47,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:05:47,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:05:47,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:05:47,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 02:05:47,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:05:47,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 02:05:47,444 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:05:47,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 02:05:47,444 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:05:47,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 02:05:47,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:05:47,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:05:47,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:05:47,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:05:47,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:05:47,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:05:47,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 02:05:47,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:05:47,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:05:47,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:05:47,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 02:05:47,447 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:05:47,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:05:47,447 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:05:47,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2023-02-17 02:05:47,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:05:47,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:05:47,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:05:47,666 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:05:47,667 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:05:47,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2023-02-17 02:05:48,694 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:05:48,796 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:05:48,797 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2023-02-17 02:05:48,801 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23f9b000/777931a6b1f14fe6be70749c03c60343/FLAG48ac3d16d [2023-02-17 02:05:48,809 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23f9b000/777931a6b1f14fe6be70749c03c60343 [2023-02-17 02:05:48,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:05:48,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:05:48,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:05:48,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:05:48,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:05:48,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc407f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48, skipping insertion in model container [2023-02-17 02:05:48,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:05:48,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:05:48,908 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] [2023-02-17 02:05:48,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:05:48,923 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:05:48,931 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] [2023-02-17 02:05:48,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:05:48,942 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:05:48,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48 WrapperNode [2023-02-17 02:05:48,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:05:48,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:05:48,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:05:48,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:05:48,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,964 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-17 02:05:48,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:05:48,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:05:48,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:05:48,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:05:48,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:05:48,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:05:48,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:05:48,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:05:48,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (1/1) ... [2023-02-17 02:05:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:05:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:49,028 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) [2023-02-17 02:05:49,058 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 [2023-02-17 02:05:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:05:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:05:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:05:49,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:05:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 02:05:49,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 02:05:49,116 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:05:49,118 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:05:49,268 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:05:49,272 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:05:49,272 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 02:05:49,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:05:49 BoogieIcfgContainer [2023-02-17 02:05:49,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:05:49,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:05:49,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:05:49,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:05:49,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:05:48" (1/3) ... [2023-02-17 02:05:49,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e642a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:05:49, skipping insertion in model container [2023-02-17 02:05:49,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:05:48" (2/3) ... [2023-02-17 02:05:49,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e642a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:05:49, skipping insertion in model container [2023-02-17 02:05:49,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:05:49" (3/3) ... [2023-02-17 02:05:49,288 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2023-02-17 02:05:49,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:05:49,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 02:05:49,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:05:49,347 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;@aff7cf4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:05:49,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 02:05:49,350 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) [2023-02-17 02:05:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:05:49,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:49,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:05:49,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-17 02:05:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046006060] [2023-02-17 02:05:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:49,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046006060] [2023-02-17 02:05:49,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 02:05:49,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112055799] [2023-02-17 02:05:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:49,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:49,487 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) [2023-02-17 02:05:49,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:05:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 02:05:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:05:49,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:05:49,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112055799] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:05:49,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:05:49,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:05:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012020959] [2023-02-17 02:05:49,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:05:49,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:05:49,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:05:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:05:49,569 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) [2023-02-17 02:05:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:49,585 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-17 02:05:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:05:49,586 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 [2023-02-17 02:05:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:49,591 INFO L225 Difference]: With dead ends: 50 [2023-02-17 02:05:49,591 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 02:05:49,593 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 [2023-02-17 02:05:49,596 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 [2023-02-17 02:05:49,597 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] [2023-02-17 02:05:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 02:05:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 02:05:49,618 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) [2023-02-17 02:05:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-17 02:05:49,620 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-17 02:05:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:49,620 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-17 02:05:49,621 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) [2023-02-17 02:05:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-17 02:05:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:05:49,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:49,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:05:49,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 02:05:49,826 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 [2023-02-17 02:05:49,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-17 02:05:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:49,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433359862] [2023-02-17 02:05:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:05:49,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433359862] [2023-02-17 02:05:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433359862] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:05:49,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:05:49,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:05:49,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403057597] [2023-02-17 02:05:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:05:49,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:05:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:05:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:05:49,972 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) [2023-02-17 02:05:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:50,020 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-17 02:05:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:05:50,023 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 [2023-02-17 02:05:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:50,023 INFO L225 Difference]: With dead ends: 36 [2023-02-17 02:05:50,024 INFO L226 Difference]: Without dead ends: 34 [2023-02-17 02:05:50,024 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 [2023-02-17 02:05:50,025 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 [2023-02-17 02:05:50,025 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] [2023-02-17 02:05:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-17 02:05:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-17 02:05:50,032 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) [2023-02-17 02:05:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-17 02:05:50,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-17 02:05:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:50,033 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-17 02:05:50,033 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) [2023-02-17 02:05:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-17 02:05:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 02:05:50,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:50,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:05:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 02:05:50,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-17 02:05:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730715338] [2023-02-17 02:05:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:50,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730715338] [2023-02-17 02:05:50,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 02:05:50,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540517027] [2023-02-17 02:05:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:50,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:50,051 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) [2023-02-17 02:05:50,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:05:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 02:05:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:05:50,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:05:50,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540517027] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:05:50,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:05:50,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:05:50,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041322680] [2023-02-17 02:05:50,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:05:50,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:05:50,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:05:50,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:05:50,139 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) [2023-02-17 02:05:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:50,165 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-17 02:05:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:05:50,165 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 [2023-02-17 02:05:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:50,166 INFO L225 Difference]: With dead ends: 42 [2023-02-17 02:05:50,166 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 02:05:50,167 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 [2023-02-17 02:05:50,169 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 [2023-02-17 02:05:50,170 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] [2023-02-17 02:05:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 02:05:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-17 02:05:50,185 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) [2023-02-17 02:05:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-17 02:05:50,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-17 02:05:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:50,187 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-17 02:05:50,187 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) [2023-02-17 02:05:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-17 02:05:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 02:05:50,188 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:50,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:05:50,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 02:05:50,392 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 [2023-02-17 02:05:50,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-17 02:05:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:50,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534573919] [2023-02-17 02:05:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:50,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 02:05:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:05:50,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534573919] [2023-02-17 02:05:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534573919] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:05:50,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:05:50,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:05:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382450915] [2023-02-17 02:05:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:05:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:05:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:05:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:05:50,515 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) [2023-02-17 02:05:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:50,563 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-17 02:05:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:05:50,564 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 [2023-02-17 02:05:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:50,564 INFO L225 Difference]: With dead ends: 42 [2023-02-17 02:05:50,564 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 02:05:50,565 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 [2023-02-17 02:05:50,566 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 [2023-02-17 02:05:50,566 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] [2023-02-17 02:05:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 02:05:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-17 02:05:50,570 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) [2023-02-17 02:05:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-17 02:05:50,571 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-17 02:05:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:50,571 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-17 02:05:50,572 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) [2023-02-17 02:05:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-17 02:05:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 02:05:50,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:50,572 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:05:50,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 02:05:50,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-17 02:05:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:50,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080865258] [2023-02-17 02:05:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:50,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:50,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258184350] [2023-02-17 02:05:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:50,583 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) [2023-02-17 02:05:50,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:05:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:50,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 02:05:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 02:05:50,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 02:05:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080865258] [2023-02-17 02:05:50,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258184350] [2023-02-17 02:05:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258184350] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:50,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:50,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 02:05:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088328943] [2023-02-17 02:05:50,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 02:05:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 02:05:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 02:05:50,759 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), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 02:05:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:50,989 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-17 02:05:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:05:50,990 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), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2023-02-17 02:05:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:50,993 INFO L225 Difference]: With dead ends: 71 [2023-02-17 02:05:50,993 INFO L226 Difference]: Without dead ends: 56 [2023-02-17 02:05:50,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:05:50,994 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:05:50,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 79 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:05:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-17 02:05:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-17 02:05:51,003 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) [2023-02-17 02:05:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-17 02:05:51,004 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-17 02:05:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:51,004 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-17 02:05:51,005 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), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 02:05:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-17 02:05:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:05:51,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:51,005 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:05:51,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 02:05:51,210 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 [2023-02-17 02:05:51,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-17 02:05:51,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:51,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384341068] [2023-02-17 02:05:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:51,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039269295] [2023-02-17 02:05:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:51,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:51,221 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) [2023-02-17 02:05:51,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 02:05:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:51,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 02:05:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 02:05:51,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 02:05:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384341068] [2023-02-17 02:05:51,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039269295] [2023-02-17 02:05:51,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039269295] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:51,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:51,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-17 02:05:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103258994] [2023-02-17 02:05:51,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 02:05:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 02:05:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:05:51,338 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), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 02:05:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:51,421 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-17 02:05:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:05:51,421 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), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2023-02-17 02:05:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:51,422 INFO L225 Difference]: With dead ends: 73 [2023-02-17 02:05:51,422 INFO L226 Difference]: Without dead ends: 65 [2023-02-17 02:05:51,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-17 02:05:51,423 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:05:51,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:05:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-17 02:05:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-17 02:05:51,431 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) [2023-02-17 02:05:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-17 02:05:51,432 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-17 02:05:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:51,432 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-17 02:05:51,432 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), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 02:05:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-17 02:05:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 02:05:51,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:51,433 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] [2023-02-17 02:05:51,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 02:05:51,638 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 [2023-02-17 02:05:51,638 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:51,639 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-17 02:05:51,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:51,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642484224] [2023-02-17 02:05:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:51,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:51,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:51,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059247421] [2023-02-17 02:05:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:51,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:51,647 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) [2023-02-17 02:05:51,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 02:05:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 02:05:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 02:05:51,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 02:05:51,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:51,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642484224] [2023-02-17 02:05:51,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:51,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059247421] [2023-02-17 02:05:51,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059247421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:51,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:51,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-17 02:05:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958468400] [2023-02-17 02:05:51,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:51,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:05:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:05:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:05:51,704 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) [2023-02-17 02:05:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:51,763 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-17 02:05:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 02:05:51,764 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 [2023-02-17 02:05:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:51,765 INFO L225 Difference]: With dead ends: 165 [2023-02-17 02:05:51,765 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 02:05:51,765 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 [2023-02-17 02:05:51,766 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 [2023-02-17 02:05:51,766 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] [2023-02-17 02:05:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 02:05:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-17 02:05:51,776 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) [2023-02-17 02:05:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-17 02:05:51,777 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-17 02:05:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:51,777 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-17 02:05:51,778 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) [2023-02-17 02:05:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-17 02:05:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 02:05:51,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:51,779 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] [2023-02-17 02:05:51,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 02:05:51,983 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 [2023-02-17 02:05:51,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-17 02:05:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:51,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735804810] [2023-02-17 02:05:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:51,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106933895] [2023-02-17 02:05:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:52,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:52,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:52,001 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) [2023-02-17 02:05:52,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 02:05:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:52,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 02:05:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 02:05:52,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-17 02:05:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:52,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735804810] [2023-02-17 02:05:52,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:52,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106933895] [2023-02-17 02:05:52,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106933895] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:52,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:52,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-17 02:05:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304269803] [2023-02-17 02:05:52,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:05:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:05:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 02:05:52,073 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) [2023-02-17 02:05:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:52,169 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-17 02:05:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:05:52,169 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 [2023-02-17 02:05:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:52,171 INFO L225 Difference]: With dead ends: 249 [2023-02-17 02:05:52,171 INFO L226 Difference]: Without dead ends: 228 [2023-02-17 02:05:52,171 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 [2023-02-17 02:05:52,172 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 [2023-02-17 02:05:52,172 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] [2023-02-17 02:05:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-17 02:05:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-17 02:05:52,189 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) [2023-02-17 02:05:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-17 02:05:52,190 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-17 02:05:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:52,190 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-17 02:05:52,190 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) [2023-02-17 02:05:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-17 02:05:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 02:05:52,192 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:52,192 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] [2023-02-17 02:05:52,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 02:05:52,396 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 [2023-02-17 02:05:52,397 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-17 02:05:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473049445] [2023-02-17 02:05:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:52,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:52,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716069813] [2023-02-17 02:05:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:52,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:52,423 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) [2023-02-17 02:05:52,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 02:05:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:52,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 02:05:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 02:05:52,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 02:05:52,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473049445] [2023-02-17 02:05:52,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716069813] [2023-02-17 02:05:52,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716069813] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:52,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:52,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-17 02:05:52,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969402292] [2023-02-17 02:05:52,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:52,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 02:05:52,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 02:05:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:05:52,679 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), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-17 02:05:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:53,943 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-17 02:05:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:05:53,944 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), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2023-02-17 02:05:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:53,946 INFO L225 Difference]: With dead ends: 372 [2023-02-17 02:05:53,946 INFO L226 Difference]: Without dead ends: 299 [2023-02-17 02:05:53,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:05:53,947 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:05:53,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 02:05:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-17 02:05:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-17 02:05:53,984 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) [2023-02-17 02:05:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-17 02:05:53,985 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-17 02:05:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:53,985 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-17 02:05:53,986 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), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-17 02:05:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-17 02:05:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 02:05:53,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:53,987 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] [2023-02-17 02:05:54,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 02:05:54,192 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 [2023-02-17 02:05:54,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-17 02:05:54,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:54,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779459306] [2023-02-17 02:05:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:54,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:54,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290463162] [2023-02-17 02:05:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:54,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:54,214 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) [2023-02-17 02:05:54,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 02:05:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 02:05:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-17 02:05:54,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-17 02:05:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779459306] [2023-02-17 02:05:54,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290463162] [2023-02-17 02:05:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290463162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:54,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:54,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-17 02:05:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608452694] [2023-02-17 02:05:54,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:05:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:05:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:05:54,486 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), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 02:05:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:55,140 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-17 02:05:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 02:05:55,141 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), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2023-02-17 02:05:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:55,142 INFO L225 Difference]: With dead ends: 341 [2023-02-17 02:05:55,142 INFO L226 Difference]: Without dead ends: 260 [2023-02-17 02:05:55,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:05:55,143 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 02:05:55,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 111 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 02:05:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-17 02:05:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-17 02:05:55,195 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) [2023-02-17 02:05:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-17 02:05:55,197 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-17 02:05:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:55,197 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-17 02:05:55,197 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), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 02:05:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-17 02:05:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-17 02:05:55,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:55,201 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] [2023-02-17 02:05:55,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 02:05:55,406 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 [2023-02-17 02:05:55,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-17 02:05:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:55,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039408349] [2023-02-17 02:05:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:55,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731609280] [2023-02-17 02:05:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:55,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:55,414 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) [2023-02-17 02:05:55,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 02:05:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:05:55,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 02:05:55,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 02:05:55,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 02:05:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039408349] [2023-02-17 02:05:55,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731609280] [2023-02-17 02:05:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731609280] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:55,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:55,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-17 02:05:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404384423] [2023-02-17 02:05:55,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:55,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:05:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:05:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:05:55,605 INFO L87 Difference]: Start difference. First operand 236 states and 280 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, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-17 02:05:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:05:55,887 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2023-02-17 02:05:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 02:05:55,887 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, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2023-02-17 02:05:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:05:55,888 INFO L225 Difference]: With dead ends: 260 [2023-02-17 02:05:55,888 INFO L226 Difference]: Without dead ends: 215 [2023-02-17 02:05:55,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:05:55,889 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:05:55,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:05:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-17 02:05:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2023-02-17 02:05:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 148 states have internal predecessors, (164), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-17 02:05:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2023-02-17 02:05:55,915 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 74 [2023-02-17 02:05:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:05:55,915 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2023-02-17 02:05:55,916 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, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-17 02:05:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2023-02-17 02:05:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 02:05:55,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:05:55,917 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] [2023-02-17 02:05:55,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 02:05:56,122 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 [2023-02-17 02:05:56,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:05:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:05:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-17 02:05:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:05:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760997047] [2023-02-17 02:05:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:05:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:05:56,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:05:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572312559] [2023-02-17 02:05:56,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:05:56,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:05:56,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:05:56,130 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) [2023-02-17 02:05:56,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 02:05:56,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:05:56,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:05:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 02:05:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:05:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 02:05:56,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:05:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 02:05:58,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:05:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760997047] [2023-02-17 02:05:58,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:05:58,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572312559] [2023-02-17 02:05:58,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572312559] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:05:58,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:05:58,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-17 02:05:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993468150] [2023-02-17 02:05:58,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:05:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 02:05:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:05:58,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 02:05:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-17 02:05:58,901 INFO L87 Difference]: Start difference. First operand 210 states and 244 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) [2023-02-17 02:06:01,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:08,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:10,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:12,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:14,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:14,672 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2023-02-17 02:06:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 02:06:14,673 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 [2023-02-17 02:06:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:14,674 INFO L225 Difference]: With dead ends: 306 [2023-02-17 02:06:14,674 INFO L226 Difference]: Without dead ends: 262 [2023-02-17 02:06:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=151, Invalid=550, Unknown=1, NotChecked=0, Total=702 [2023-02-17 02:06:14,675 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 115 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 143 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 328 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1060 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2023-02-17 02:06:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-17 02:06:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 247. [2023-02-17 02:06:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-17 02:06:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 305 transitions. [2023-02-17 02:06:14,779 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 305 transitions. Word has length 90 [2023-02-17 02:06:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:14,780 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 305 transitions. [2023-02-17 02:06:14,780 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) [2023-02-17 02:06:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 305 transitions. [2023-02-17 02:06:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-17 02:06:14,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:14,781 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] [2023-02-17 02:06:14,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:14,981 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 [2023-02-17 02:06:14,981 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-17 02:06:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:14,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133477393] [2023-02-17 02:06:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:14,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382468815] [2023-02-17 02:06:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:14,989 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) [2023-02-17 02:06:14,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 02:06:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:06:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 02:06:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-17 02:06:15,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-17 02:06:15,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133477393] [2023-02-17 02:06:15,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382468815] [2023-02-17 02:06:15,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382468815] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:06:15,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:06:15,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-17 02:06:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278686440] [2023-02-17 02:06:15,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 02:06:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 02:06:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:06:15,091 INFO L87 Difference]: Start difference. First operand 247 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) [2023-02-17 02:06:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:15,520 INFO L93 Difference]: Finished difference Result 707 states and 937 transitions. [2023-02-17 02:06:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 02:06:15,521 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 [2023-02-17 02:06:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:15,523 INFO L225 Difference]: With dead ends: 707 [2023-02-17 02:06:15,523 INFO L226 Difference]: Without dead ends: 629 [2023-02-17 02:06:15,524 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 [2023-02-17 02:06:15,525 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 163 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:15,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 293 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:06:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-02-17 02:06:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 549. [2023-02-17 02:06:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 362 states have (on average 1.270718232044199) internal successors, (460), 391 states have internal predecessors, (460), 134 states have call successors, (134), 53 states have call predecessors, (134), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-17 02:06:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 721 transitions. [2023-02-17 02:06:15,811 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 721 transitions. Word has length 96 [2023-02-17 02:06:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:15,812 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 721 transitions. [2023-02-17 02:06:15,812 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) [2023-02-17 02:06:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 721 transitions. [2023-02-17 02:06:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 02:06:15,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:15,813 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] [2023-02-17 02:06:15,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:16,024 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 [2023-02-17 02:06:16,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-17 02:06:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:16,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778853418] [2023-02-17 02:06:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:16,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539366223] [2023-02-17 02:06:16,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:06:16,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:16,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:16,033 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) [2023-02-17 02:06:16,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 02:06:16,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:06:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:06:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 02:06:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-17 02:06:16,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-17 02:06:18,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778853418] [2023-02-17 02:06:18,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539366223] [2023-02-17 02:06:18,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539366223] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:06:18,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:06:18,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-17 02:06:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895769409] [2023-02-17 02:06:18,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 02:06:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 02:06:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-17 02:06:18,803 INFO L87 Difference]: Start difference. First operand 549 states and 721 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) [2023-02-17 02:06:23,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:26,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:06:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:33,476 INFO L93 Difference]: Finished difference Result 672 states and 874 transitions. [2023-02-17 02:06:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 02:06:33,476 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 [2023-02-17 02:06:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:33,480 INFO L225 Difference]: With dead ends: 672 [2023-02-17 02:06:33,480 INFO L226 Difference]: Without dead ends: 511 [2023-02-17 02:06:33,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=227, Invalid=764, Unknown=1, NotChecked=0, Total=992 [2023-02-17 02:06:33,481 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 69 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:33,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 237 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 830 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2023-02-17 02:06:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2023-02-17 02:06:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 488. [2023-02-17 02:06:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 322 states have (on average 1.2111801242236024) internal successors, (390), 347 states have internal predecessors, (390), 112 states have call successors, (112), 53 states have call predecessors, (112), 53 states have return successors, (107), 87 states have call predecessors, (107), 107 states have call successors, (107) [2023-02-17 02:06:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 609 transitions. [2023-02-17 02:06:33,696 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 609 transitions. Word has length 101 [2023-02-17 02:06:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:33,696 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 609 transitions. [2023-02-17 02:06:33,696 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) [2023-02-17 02:06:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 609 transitions. [2023-02-17 02:06:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-17 02:06:33,697 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:33,697 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] [2023-02-17 02:06:33,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:33,902 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 [2023-02-17 02:06:33,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-17 02:06:33,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:33,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860010957] [2023-02-17 02:06:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:33,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:33,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678647457] [2023-02-17 02:06:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:33,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:33,917 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) [2023-02-17 02:06:33,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 02:06:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:06:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 02:06:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 02:06:34,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-17 02:06:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860010957] [2023-02-17 02:06:34,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678647457] [2023-02-17 02:06:34,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678647457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:06:34,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:06:34,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2023-02-17 02:06:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733013666] [2023-02-17 02:06:34,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:34,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 02:06:34,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 02:06:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:06:34,057 INFO L87 Difference]: Start difference. First operand 488 states and 609 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) [2023-02-17 02:06:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:34,410 INFO L93 Difference]: Finished difference Result 572 states and 720 transitions. [2023-02-17 02:06:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 02:06:34,411 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 [2023-02-17 02:06:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:34,413 INFO L225 Difference]: With dead ends: 572 [2023-02-17 02:06:34,413 INFO L226 Difference]: Without dead ends: 537 [2023-02-17 02:06:34,413 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 [2023-02-17 02:06:34,414 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 89 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:34,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 280 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:06:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-02-17 02:06:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 533. [2023-02-17 02:06:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 361 states have (on average 1.1385041551246537) internal successors, (411), 381 states have internal predecessors, (411), 118 states have call successors, (118), 53 states have call predecessors, (118), 53 states have return successors, (114), 98 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-17 02:06:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 643 transitions. [2023-02-17 02:06:34,623 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 643 transitions. Word has length 104 [2023-02-17 02:06:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:34,623 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 643 transitions. [2023-02-17 02:06:34,623 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) [2023-02-17 02:06:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 643 transitions. [2023-02-17 02:06:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-17 02:06:34,625 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:34,625 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] [2023-02-17 02:06:34,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-17 02:06:34,830 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 [2023-02-17 02:06:34,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-17 02:06:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:34,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517962445] [2023-02-17 02:06:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:34,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089539791] [2023-02-17 02:06:34,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:06:34,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:34,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:34,838 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) [2023-02-17 02:06:34,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 02:06:34,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 02:06:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:06:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 02:06:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-17 02:06:35,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:35,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:35,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517962445] [2023-02-17 02:06:35,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:35,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089539791] [2023-02-17 02:06:35,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089539791] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:06:35,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:06:35,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 02:06:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523284189] [2023-02-17 02:06:35,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 02:06:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 02:06:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-17 02:06:35,299 INFO L87 Difference]: Start difference. First operand 533 states and 643 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) [2023-02-17 02:06:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:35,631 INFO L93 Difference]: Finished difference Result 548 states and 657 transitions. [2023-02-17 02:06:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:06:35,632 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 [2023-02-17 02:06:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:35,634 INFO L225 Difference]: With dead ends: 548 [2023-02-17 02:06:35,634 INFO L226 Difference]: Without dead ends: 542 [2023-02-17 02:06:35,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-17 02:06:35,635 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:35,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 63 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:06:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-02-17 02:06:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 538. [2023-02-17 02:06:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 366 states have (on average 1.1311475409836065) internal successors, (414), 384 states have internal predecessors, (414), 117 states have call successors, (117), 55 states have call predecessors, (117), 54 states have return successors, (114), 98 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-17 02:06:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 645 transitions. [2023-02-17 02:06:35,864 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 645 transitions. Word has length 122 [2023-02-17 02:06:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:35,865 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 645 transitions. [2023-02-17 02:06:35,865 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) [2023-02-17 02:06:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 645 transitions. [2023-02-17 02:06:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-17 02:06:35,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:35,874 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] [2023-02-17 02:06:35,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 02:06:36,079 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 [2023-02-17 02:06:36,080 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-17 02:06:36,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917941682] [2023-02-17 02:06:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:36,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989672795] [2023-02-17 02:06:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:06:36,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:36,110 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) [2023-02-17 02:06:36,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 02:06:36,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 02:06:36,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:06:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 02:06:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-17 02:06:36,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-17 02:06:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917941682] [2023-02-17 02:06:36,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989672795] [2023-02-17 02:06:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989672795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:06:36,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:06:36,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-17 02:06:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747027223] [2023-02-17 02:06:36,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:36,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:06:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:06:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-17 02:06:36,254 INFO L87 Difference]: Start difference. First operand 538 states and 645 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) [2023-02-17 02:06:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:36,638 INFO L93 Difference]: Finished difference Result 545 states and 651 transitions. [2023-02-17 02:06:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 02:06:36,638 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 [2023-02-17 02:06:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:36,640 INFO L225 Difference]: With dead ends: 545 [2023-02-17 02:06:36,640 INFO L226 Difference]: Without dead ends: 535 [2023-02-17 02:06:36,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-17 02:06:36,641 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:36,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 82 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:06:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-02-17 02:06:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 379. [2023-02-17 02:06:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.09765625) internal successors, (281), 268 states have internal predecessors, (281), 75 states have call successors, (75), 47 states have call predecessors, (75), 47 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-17 02:06:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 430 transitions. [2023-02-17 02:06:36,856 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 430 transitions. Word has length 133 [2023-02-17 02:06:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:36,856 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 430 transitions. [2023-02-17 02:06:36,856 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) [2023-02-17 02:06:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 430 transitions. [2023-02-17 02:06:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-02-17 02:06:36,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:36,858 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 8, 7, 7, 7, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:06:36,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:37,063 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 [2023-02-17 02:06:37,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -806632286, now seen corresponding path program 2 times [2023-02-17 02:06:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:37,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039861514] [2023-02-17 02:06:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:37,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573038810] [2023-02-17 02:06:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:06:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:37,073 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) [2023-02-17 02:06:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 02:06:37,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:06:37,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:06:37,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 02:06:37,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2023-02-17 02:06:37,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:06:37,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:37,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039861514] [2023-02-17 02:06:37,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:37,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573038810] [2023-02-17 02:06:37,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573038810] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:06:37,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:06:37,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:06:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943347635] [2023-02-17 02:06:37,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:06:37,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:06:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:06:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:06:37,179 INFO L87 Difference]: Start difference. First operand 379 states and 430 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-17 02:06:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:37,508 INFO L93 Difference]: Finished difference Result 543 states and 634 transitions. [2023-02-17 02:06:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:06:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 160 [2023-02-17 02:06:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:37,510 INFO L225 Difference]: With dead ends: 543 [2023-02-17 02:06:37,510 INFO L226 Difference]: Without dead ends: 384 [2023-02-17 02:06:37,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:06:37,511 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:37,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 103 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:06:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-17 02:06:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 325. [2023-02-17 02:06:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 222 states have (on average 1.0765765765765767) internal successors, (239), 228 states have internal predecessors, (239), 59 states have call successors, (59), 43 states have call predecessors, (59), 43 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2023-02-17 02:06:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 356 transitions. [2023-02-17 02:06:37,680 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 356 transitions. Word has length 160 [2023-02-17 02:06:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:37,681 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 356 transitions. [2023-02-17 02:06:37,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-17 02:06:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 356 transitions. [2023-02-17 02:06:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-17 02:06:37,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:37,682 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] [2023-02-17 02:06:37,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:37,887 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 [2023-02-17 02:06:37,888 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1705968445, now seen corresponding path program 1 times [2023-02-17 02:06:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:37,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025979291] [2023-02-17 02:06:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:37,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:37,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883387879] [2023-02-17 02:06:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:37,896 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) [2023-02-17 02:06:37,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 02:06:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:06:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 02:06:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-02-17 02:06:37,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2023-02-17 02:06:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025979291] [2023-02-17 02:06:38,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883387879] [2023-02-17 02:06:38,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883387879] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:06:38,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:06:38,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-02-17 02:06:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600118298] [2023-02-17 02:06:38,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 02:06:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 02:06:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:06:38,220 INFO L87 Difference]: Start difference. First operand 325 states and 356 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2023-02-17 02:06:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:38,564 INFO L93 Difference]: Finished difference Result 386 states and 430 transitions. [2023-02-17 02:06:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:06:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) Word has length 164 [2023-02-17 02:06:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:38,569 INFO L225 Difference]: With dead ends: 386 [2023-02-17 02:06:38,569 INFO L226 Difference]: Without dead ends: 302 [2023-02-17 02:06:38,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:06:38,569 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:38,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 333 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:06:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-02-17 02:06:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2023-02-17 02:06:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 206 states have (on average 1.0728155339805825) internal successors, (221), 211 states have internal predecessors, (221), 54 states have call successors, (54), 41 states have call predecessors, (54), 41 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2023-02-17 02:06:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 328 transitions. [2023-02-17 02:06:38,731 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 328 transitions. Word has length 164 [2023-02-17 02:06:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:38,732 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 328 transitions. [2023-02-17 02:06:38,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2023-02-17 02:06:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 328 transitions. [2023-02-17 02:06:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-17 02:06:38,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:38,733 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] [2023-02-17 02:06:38,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:38,939 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 [2023-02-17 02:06:38,939 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1021836698, now seen corresponding path program 2 times [2023-02-17 02:06:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:38,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118767679] [2023-02-17 02:06:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:38,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:38,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400560070] [2023-02-17 02:06:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:06:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:38,958 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) [2023-02-17 02:06:38,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 02:06:39,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:06:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:06:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 02:06:39,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:06:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-02-17 02:06:39,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:06:39,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:06:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118767679] [2023-02-17 02:06:39,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:06:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400560070] [2023-02-17 02:06:39,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400560070] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:06:39,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:06:39,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-17 02:06:39,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412381690] [2023-02-17 02:06:39,540 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:06:39,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 02:06:39,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:06:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 02:06:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-02-17 02:06:39,541 INFO L87 Difference]: Start difference. First operand 302 states and 328 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2023-02-17 02:06:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:06:40,285 INFO L93 Difference]: Finished difference Result 350 states and 390 transitions. [2023-02-17 02:06:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 02:06:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) Word has length 168 [2023-02-17 02:06:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:06:40,295 INFO L225 Difference]: With dead ends: 350 [2023-02-17 02:06:40,296 INFO L226 Difference]: Without dead ends: 279 [2023-02-17 02:06:40,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-02-17 02:06:40,296 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 19 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:06:40,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 516 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 02:06:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-17 02:06:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2023-02-17 02:06:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 190 states have (on average 1.068421052631579) internal successors, (203), 194 states have internal predecessors, (203), 49 states have call successors, (49), 39 states have call predecessors, (49), 39 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-17 02:06:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 300 transitions. [2023-02-17 02:06:40,438 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 300 transitions. Word has length 168 [2023-02-17 02:06:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:06:40,438 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 300 transitions. [2023-02-17 02:06:40,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2023-02-17 02:06:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 300 transitions. [2023-02-17 02:06:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-02-17 02:06:40,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:06:40,440 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:06:40,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 02:06:40,645 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 [2023-02-17 02:06:40,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:06:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:06:40,645 INFO L85 PathProgramCache]: Analyzing trace with hash 262066743, now seen corresponding path program 3 times [2023-02-17 02:06:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:06:40,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883431590] [2023-02-17 02:06:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:06:40,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:06:40,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:06:40,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654753270] [2023-02-17 02:06:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 02:06:40,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:40,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:06:40,653 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) [2023-02-17 02:06:40,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 02:06:40,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-17 02:06:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-17 02:06:40,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 02:06:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 02:06:40,850 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 02:06:40,850 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 02:06:40,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 02:06:40,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 02:06:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:06:41,060 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:06:41,063 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 02:06:41,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 02:06:41 BoogieIcfgContainer [2023-02-17 02:06:41,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 02:06:41,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 02:06:41,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 02:06:41,121 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 02:06:41,121 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:05:49" (3/4) ... [2023-02-17 02:06:41,122 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 02:06:41,174 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 02:06:41,175 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 02:06:41,175 INFO L158 Benchmark]: Toolchain (without parser) took 52363.29ms. Allocated memory was 174.1MB in the beginning and 373.3MB in the end (delta: 199.2MB). Free memory was 129.1MB in the beginning and 121.4MB in the end (delta: 7.8MB). Peak memory consumption was 208.7MB. Max. memory is 16.1GB. [2023-02-17 02:06:41,175 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 57.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 02:06:41,176 INFO L158 Benchmark]: CACSL2BoogieTranslator took 129.90ms. Allocated memory is still 174.1MB. Free memory was 128.5MB in the beginning and 118.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 02:06:41,176 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.87ms. Allocated memory is still 174.1MB. Free memory was 118.0MB in the beginning and 116.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 02:06:41,176 INFO L158 Benchmark]: Boogie Preprocessor took 17.25ms. Allocated memory is still 174.1MB. Free memory was 116.6MB in the beginning and 115.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 02:06:41,176 INFO L158 Benchmark]: RCFGBuilder took 298.60ms. Allocated memory is still 174.1MB. Free memory was 115.2MB in the beginning and 104.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 02:06:41,176 INFO L158 Benchmark]: TraceAbstraction took 51836.63ms. Allocated memory was 174.1MB in the beginning and 373.3MB in the end (delta: 199.2MB). Free memory was 104.0MB in the beginning and 127.7MB in the end (delta: -23.7MB). Peak memory consumption was 177.3MB. Max. memory is 16.1GB. [2023-02-17 02:06:41,177 INFO L158 Benchmark]: Witness Printer took 54.54ms. Allocated memory is still 373.3MB. Free memory was 127.7MB in the beginning and 121.4MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-17 02:06:41,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 57.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 129.90ms. Allocated memory is still 174.1MB. Free memory was 128.5MB in the beginning and 118.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.87ms. Allocated memory is still 174.1MB. Free memory was 118.0MB in the beginning and 116.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.25ms. Allocated memory is still 174.1MB. Free memory was 116.6MB in the beginning and 115.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 298.60ms. Allocated memory is still 174.1MB. Free memory was 115.2MB in the beginning and 104.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 51836.63ms. Allocated memory was 174.1MB in the beginning and 373.3MB in the end (delta: 199.2MB). Free memory was 104.0MB in the beginning and 127.7MB in the end (delta: -23.7MB). Peak memory consumption was 177.3MB. Max. memory is 16.1GB. * Witness Printer took 54.54ms. Allocated memory is still 373.3MB. Free memory was 127.7MB in the beginning and 121.4MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=31, B=1, counter=0, d=1, p=1, q=0, r=31] [L34] EXPR counter++ VAL [A=31, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=31, B=1, counter=1, d=2, p=2, q=0, r=31] [L34] EXPR counter++ VAL [A=31, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=31, B=1, counter=2, d=4, p=4, q=0, r=31] [L34] EXPR counter++ VAL [A=31, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=31, B=1, counter=3, d=8, p=8, q=0, r=31] [L34] EXPR counter++ VAL [A=31, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=31, B=1, counter=4, d=16, p=16, q=0, r=31] [L34] EXPR counter++ VAL [A=31, B=1, counter=5, counter++=4, d=16, p=16, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=31, B=1, counter=5, d=32, p=32, q=0, r=31] [L34] EXPR counter++ VAL [A=31, B=1, counter=6, counter++=5, d=32, p=32, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L38] COND TRUE !(r >= d) VAL [A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L44] EXPR counter++ VAL [A=31, B=1, counter=7, counter++=6, d=32, p=32, q=0, r=31] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=31, B=1, counter=7, d=16, p=16, q=0, r=31] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=31, B=1, counter=7, d=16, p=16, q=16, r=15] [L44] EXPR counter++ VAL [A=31, B=1, counter=8, counter++=7, d=16, p=16, q=16, r=15] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=31, B=1, counter=8, d=8, p=8, q=16, r=15] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=31, B=1, counter=8, d=8, p=8, q=24, r=7] [L44] EXPR counter++ VAL [A=31, B=1, counter=9, counter++=8, d=8, p=8, q=24, r=7] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=31, B=1, counter=9, d=4, p=4, q=24, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=31, B=1, counter=9, d=4, p=4, q=28, r=3] [L44] EXPR counter++ VAL [A=31, B=1, counter=10, counter++=9, d=4, p=4, q=28, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=31, B=1, counter=10, d=2, p=2, q=28, r=3] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=31, B=1, counter=10, d=2, p=2, q=30, r=1] [L44] EXPR counter++ VAL [A=31, B=1, counter=11, counter++=10, d=2, p=2, q=30, r=1] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 51.7s, OverallIterations: 21, TraceHistogramMax: 27, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 36.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 998 SdHoareTripleChecker+Valid, 23.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 937 mSDsluCounter, 3521 SdHoareTripleChecker+Invalid, 22.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2663 mSDsCounter, 746 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5143 IncrementalHoareTripleChecker+Invalid, 5893 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 746 mSolverCounterUnsat, 858 mSDtfsCounter, 5143 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2602 GetRequests, 2305 SyntacticMatches, 22 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=549occurred in iteration=13, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 20 MinimizatonAttempts, 431 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 1694 NumberOfCodeBlocks, 1576 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2486 ConstructedInterpolants, 4 QuantifiedInterpolants, 40716 SizeOfPredicates, 72 NumberOfNonLiveVariables, 3828 ConjunctsInSsa, 393 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 11058/12721 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-17 02:06:41,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE