./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:25:44,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:25:44,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:25:44,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:25:44,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:25:44,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:25:44,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:25:44,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:25:44,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:25:44,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:25:44,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:25:44,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:25:44,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:25:44,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:25:44,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:25:44,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:25:44,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:25:44,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:25:44,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:25:44,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:25:44,409 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:25:44,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:25:44,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:25:44,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:25:44,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:25:44,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:25:44,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:25:44,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:25:44,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:25:44,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:25:44,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:25:44,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:25:44,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:25:44,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:25:44,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:25:44,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:25:44,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:25:44,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:25:44,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:25:44,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:25:44,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:25:44,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:25:44,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:25:44,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:25:44,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:25:44,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:25:44,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:25:44,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:25:44,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:25:44,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:25:44,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:25:44,450 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:25:44,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:25:44,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:25:44,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:25:44,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:25:44,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:25:44,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:25:44,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:25:44,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:25:44,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:25:44,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:25:44,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:25:44,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:25:44,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2022-07-19 15:25:44,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:25:44,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:25:44,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:25:44,641 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:25:44,641 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:25:44,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-19 15:25:44,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555dcf587/8f8fd4da11a94feeac4a49185a46ee7d/FLAG02a09bd45 [2022-07-19 15:25:45,018 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:25:45,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-19 15:25:45,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555dcf587/8f8fd4da11a94feeac4a49185a46ee7d/FLAG02a09bd45 [2022-07-19 15:25:45,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555dcf587/8f8fd4da11a94feeac4a49185a46ee7d [2022-07-19 15:25:45,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:25:45,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:25:45,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:25:45,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:25:45,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:25:45,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a6ae17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45, skipping insertion in model container [2022-07-19 15:25:45,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:25:45,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:25:45,579 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2022-07-19 15:25:45,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:25:45,600 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:25:45,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2022-07-19 15:25:45,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:25:45,625 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:25:45,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45 WrapperNode [2022-07-19 15:25:45,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:25:45,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:25:45,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:25:45,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:25:45,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,647 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-07-19 15:25:45,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:25:45,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:25:45,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:25:45,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:25:45,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:25:45,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:25:45,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:25:45,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:25:45,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (1/1) ... [2022-07-19 15:25:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:25:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:45,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 15:25:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 15:25:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:25:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:25:45,723 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:25:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:25:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:25:45,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:25:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:25:45,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:25:45,766 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:25:45,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:25:45,858 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:25:45,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:25:45,862 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 15:25:45,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:25:45 BoogieIcfgContainer [2022-07-19 15:25:45,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:25:45,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:25:45,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:25:45,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:25:45,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:25:45" (1/3) ... [2022-07-19 15:25:45,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449b242e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:25:45, skipping insertion in model container [2022-07-19 15:25:45,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:25:45" (2/3) ... [2022-07-19 15:25:45,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449b242e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:25:45, skipping insertion in model container [2022-07-19 15:25:45,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:25:45" (3/3) ... [2022-07-19 15:25:45,869 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-07-19 15:25:45,878 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:25:45,879 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:25:45,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:25:45,912 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1d47e99d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33ef7704 [2022-07-19 15:25:45,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:25:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 15:25:45,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 15:25:45,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:45,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:45,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2022-07-19 15:25:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:45,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158461457] [2022-07-19 15:25:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 15:25:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:46,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:25:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:25:46,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:46,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158461457] [2022-07-19 15:25:46,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158461457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:46,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:46,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:25:46,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609150003] [2022-07-19 15:25:46,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:46,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:25:46,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:25:46,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:25:46,066 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:25:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:46,088 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2022-07-19 15:25:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:25:46,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-19 15:25:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:46,095 INFO L225 Difference]: With dead ends: 61 [2022-07-19 15:25:46,095 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 15:25:46,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:25:46,100 INFO L413 NwaCegarLoop]: 39 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, 39 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 [2022-07-19 15:25:46,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:25:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 15:25:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-19 15:25:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 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) [2022-07-19 15:25:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-19 15:25:46,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2022-07-19 15:25:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:46,126 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-19 15:25:46,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:25:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-19 15:25:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:25:46,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:46,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:46,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:25:46,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2022-07-19 15:25:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:46,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837229189] [2022-07-19 15:25:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:46,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348289317] [2022-07-19 15:25:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:46,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:46,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:25:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:25:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:46,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:25:46,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837229189] [2022-07-19 15:25:46,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348289317] [2022-07-19 15:25:46,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348289317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:46,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:46,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 15:25:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091746449] [2022-07-19 15:25:46,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:46,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:25:46,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:25:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:25:46,299 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:25:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:46,389 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-07-19 15:25:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:25:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 15:25:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:46,392 INFO L225 Difference]: With dead ends: 47 [2022-07-19 15:25:46,392 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 15:25:46,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:25:46,393 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:46,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 104 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:25:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 15:25:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-07-19 15:25:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 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) [2022-07-19 15:25:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-19 15:25:46,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-07-19 15:25:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:46,401 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-19 15:25:46,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:25:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-19 15:25:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:25:46,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:46,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:46,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 15:25:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:46,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2022-07-19 15:25:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698606081] [2022-07-19 15:25:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:46,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:46,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706089588] [2022-07-19 15:25:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:46,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:46,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:46,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:46,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:25:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:25:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:46,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:25:46,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698606081] [2022-07-19 15:25:46,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706089588] [2022-07-19 15:25:46,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706089588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:46,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:46,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 15:25:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515637147] [2022-07-19 15:25:46,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:46,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:25:46,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:25:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:25:46,770 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:25:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:46,859 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-19 15:25:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:25:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-19 15:25:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:46,863 INFO L225 Difference]: With dead ends: 46 [2022-07-19 15:25:46,863 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 15:25:46,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:25:46,869 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:46,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 147 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:25:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 15:25:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-19 15:25:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 15:25:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-07-19 15:25:46,890 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-07-19 15:25:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:46,890 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-07-19 15:25:46,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:25:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-07-19 15:25:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 15:25:46,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:46,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:46,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:47,107 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 [2022-07-19 15:25:47,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2022-07-19 15:25:47,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:47,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69813336] [2022-07-19 15:25:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:47,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678441695] [2022-07-19 15:25:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:47,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:47,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:47,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:25:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:25:47,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:47,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:25:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:47,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69813336] [2022-07-19 15:25:47,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678441695] [2022-07-19 15:25:47,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678441695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:25:47,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:25:47,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-19 15:25:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295029058] [2022-07-19 15:25:47,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:25:47,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:25:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:25:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:25:47,302 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:25:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:47,447 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2022-07-19 15:25:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:25:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-07-19 15:25:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:47,448 INFO L225 Difference]: With dead ends: 96 [2022-07-19 15:25:47,448 INFO L226 Difference]: Without dead ends: 89 [2022-07-19 15:25:47,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:25:47,449 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:47,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 161 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:25:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-19 15:25:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-19 15:25:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:25:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-07-19 15:25:47,460 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2022-07-19 15:25:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:47,460 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-07-19 15:25:47,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:25:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-07-19 15:25:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:25:47,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:47,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:47,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:47,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:47,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2022-07-19 15:25:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:47,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116216555] [2022-07-19 15:25:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:47,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:47,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508006214] [2022-07-19 15:25:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:47,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:47,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:47,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:47,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:25:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:47,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:25:47,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:47,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:25:47,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:47,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116216555] [2022-07-19 15:25:47,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:47,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508006214] [2022-07-19 15:25:47,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508006214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:47,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:47,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 15:25:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14901047] [2022-07-19 15:25:47,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:47,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 15:25:47,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 15:25:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:25:47,868 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:25:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:47,942 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-19 15:25:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:25:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-19 15:25:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:47,944 INFO L225 Difference]: With dead ends: 72 [2022-07-19 15:25:47,944 INFO L226 Difference]: Without dead ends: 70 [2022-07-19 15:25:47,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:25:47,945 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:47,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:25:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-19 15:25:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-07-19 15:25:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:25:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2022-07-19 15:25:47,952 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2022-07-19 15:25:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:47,953 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2022-07-19 15:25:47,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:25:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2022-07-19 15:25:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:25:47,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:47,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:47,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:48,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2022-07-19 15:25:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:48,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522632015] [2022-07-19 15:25:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:48,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:48,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599433196] [2022-07-19 15:25:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:48,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:48,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:48,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:25:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:48,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 15:25:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:48,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:25:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:25:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522632015] [2022-07-19 15:25:48,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599433196] [2022-07-19 15:25:48,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599433196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:25:48,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:25:48,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-07-19 15:25:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963205400] [2022-07-19 15:25:48,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:25:48,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:25:48,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:25:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:25:48,382 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:25:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:48,536 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2022-07-19 15:25:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:25:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-07-19 15:25:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:48,537 INFO L225 Difference]: With dead ends: 104 [2022-07-19 15:25:48,537 INFO L226 Difference]: Without dead ends: 102 [2022-07-19 15:25:48,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:25:48,538 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:48,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:25:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-19 15:25:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-07-19 15:25:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 15:25:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2022-07-19 15:25:48,559 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2022-07-19 15:25:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:48,559 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2022-07-19 15:25:48,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:25:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2022-07-19 15:25:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:25:48,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:48,560 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:48,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:48,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2022-07-19 15:25:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056191997] [2022-07-19 15:25:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:48,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:48,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277417944] [2022-07-19 15:25:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:48,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:48,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:48,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:25:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:48,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:25:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:25:48,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:25:48,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056191997] [2022-07-19 15:25:48,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277417944] [2022-07-19 15:25:48,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277417944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:48,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:48,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:25:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240575333] [2022-07-19 15:25:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:25:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:25:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:25:48,873 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:25:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:48,915 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2022-07-19 15:25:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:25:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-19 15:25:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:48,917 INFO L225 Difference]: With dead ends: 144 [2022-07-19 15:25:48,917 INFO L226 Difference]: Without dead ends: 142 [2022-07-19 15:25:48,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:25:48,918 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:48,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:25:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-19 15:25:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-07-19 15:25:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-19 15:25:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2022-07-19 15:25:48,945 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2022-07-19 15:25:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:48,946 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2022-07-19 15:25:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:25:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2022-07-19 15:25:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:25:48,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:48,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:48,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:49,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:49,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2022-07-19 15:25:49,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:49,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545549737] [2022-07-19 15:25:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:49,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:49,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:49,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430861] [2022-07-19 15:25:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:49,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:49,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:49,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:25:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 15:25:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:25:49,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:25:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:25:49,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:49,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545549737] [2022-07-19 15:25:49,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:49,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430861] [2022-07-19 15:25:49,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:25:49,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:25:49,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-07-19 15:25:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068261563] [2022-07-19 15:25:49,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:25:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 15:25:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 15:25:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:25:49,623 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 15:25:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:56,439 INFO L93 Difference]: Finished difference Result 258 states and 380 transitions. [2022-07-19 15:25:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:25:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-07-19 15:25:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:56,440 INFO L225 Difference]: With dead ends: 258 [2022-07-19 15:25:56,441 INFO L226 Difference]: Without dead ends: 256 [2022-07-19 15:25:56,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 15:25:56,442 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 168 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:56,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 246 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 15:25:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-19 15:25:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 204. [2022-07-19 15:25:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 137 states have internal predecessors, (176), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-19 15:25:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 293 transitions. [2022-07-19 15:25:56,487 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 293 transitions. Word has length 32 [2022-07-19 15:25:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:56,487 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 293 transitions. [2022-07-19 15:25:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 15:25:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 293 transitions. [2022-07-19 15:25:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:25:56,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:56,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:56,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:56,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:56,689 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:56,690 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2022-07-19 15:25:56,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:56,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135054552] [2022-07-19 15:25:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:56,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:56,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:56,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784383147] [2022-07-19 15:25:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:25:56,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:56,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:56,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:56,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:25:56,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:25:56,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:25:56,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:25:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:25:56,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:25:56,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135054552] [2022-07-19 15:25:56,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784383147] [2022-07-19 15:25:56,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784383147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:56,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:56,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:25:56,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246772423] [2022-07-19 15:25:56,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:56,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:25:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:25:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:25:56,776 INFO L87 Difference]: Start difference. First operand 204 states and 293 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:25:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:56,852 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2022-07-19 15:25:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:25:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-07-19 15:25:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:56,854 INFO L225 Difference]: With dead ends: 247 [2022-07-19 15:25:56,854 INFO L226 Difference]: Without dead ends: 127 [2022-07-19 15:25:56,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:25:56,855 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:56,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 119 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:25:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-19 15:25:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-07-19 15:25:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-19 15:25:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-07-19 15:25:56,868 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2022-07-19 15:25:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:56,869 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-07-19 15:25:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:25:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-07-19 15:25:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:25:56,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:56,870 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:56,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:57,086 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,SelfDestructingSolverStorable8 [2022-07-19 15:25:57,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2022-07-19 15:25:57,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162154601] [2022-07-19 15:25:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:57,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:57,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251673654] [2022-07-19 15:25:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:57,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:57,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:57,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:57,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:25:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:25:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:25:57,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:25:57,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162154601] [2022-07-19 15:25:57,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:57,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251673654] [2022-07-19 15:25:57,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251673654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:25:57,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:25:57,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:25:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715581499] [2022-07-19 15:25:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:25:57,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:25:57,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:25:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:25:57,198 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 15:25:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:25:57,248 INFO L93 Difference]: Finished difference Result 187 states and 271 transitions. [2022-07-19 15:25:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:25:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-07-19 15:25:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:25:57,252 INFO L225 Difference]: With dead ends: 187 [2022-07-19 15:25:57,252 INFO L226 Difference]: Without dead ends: 185 [2022-07-19 15:25:57,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:25:57,253 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:25:57,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:25:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-19 15:25:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2022-07-19 15:25:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2022-07-19 15:25:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-07-19 15:25:57,284 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2022-07-19 15:25:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:25:57,284 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-07-19 15:25:57,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 15:25:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-07-19 15:25:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 15:25:57,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:25:57,287 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:25:57,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:25:57,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:25:57,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:25:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:25:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2022-07-19 15:25:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:25:57,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444986262] [2022-07-19 15:25:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:25:57,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:25:57,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224843256] [2022-07-19 15:25:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:25:57,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:25:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:25:57,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:25:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 15:25:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:25:57,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:25:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:25:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:25:58,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:25:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:25:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:25:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444986262] [2022-07-19 15:25:59,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:25:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224843256] [2022-07-19 15:25:59,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224843256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:25:59,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:25:59,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-07-19 15:25:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358446200] [2022-07-19 15:25:59,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:25:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:25:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:25:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:25:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:25:59,045 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-19 15:26:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:26:14,866 INFO L93 Difference]: Finished difference Result 408 states and 603 transitions. [2022-07-19 15:26:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 15:26:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2022-07-19 15:26:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:26:14,871 INFO L225 Difference]: With dead ends: 408 [2022-07-19 15:26:14,871 INFO L226 Difference]: Without dead ends: 305 [2022-07-19 15:26:14,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 15:26:14,873 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:26:14,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 197 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-19 15:26:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-19 15:26:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 247. [2022-07-19 15:26:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 154 states have internal predecessors, (177), 87 states have call successors, (87), 12 states have call predecessors, (87), 12 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-19 15:26:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 350 transitions. [2022-07-19 15:26:14,953 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 350 transitions. Word has length 49 [2022-07-19 15:26:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:26:14,954 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 350 transitions. [2022-07-19 15:26:14,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-19 15:26:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 350 transitions. [2022-07-19 15:26:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 15:26:14,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:26:14,955 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:26:14,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 15:26:15,168 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,SelfDestructingSolverStorable10 [2022-07-19 15:26:15,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:26:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:26:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2022-07-19 15:26:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:26:15,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069087649] [2022-07-19 15:26:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:26:15,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:26:15,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:26:15,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860244456] [2022-07-19 15:26:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:26:15,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:26:15,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:26:15,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:26:15,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 15:26:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:26:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:26:15,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:26:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-19 15:26:15,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:26:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 15:26:15,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:26:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069087649] [2022-07-19 15:26:15,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:26:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860244456] [2022-07-19 15:26:15,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860244456] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:26:15,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:26:15,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2022-07-19 15:26:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422639238] [2022-07-19 15:26:15,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:26:15,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 15:26:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:26:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 15:26:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:26:15,442 INFO L87 Difference]: Start difference. First operand 247 states and 350 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-19 15:26:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:26:15,738 INFO L93 Difference]: Finished difference Result 278 states and 394 transitions. [2022-07-19 15:26:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 15:26:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-07-19 15:26:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:26:15,743 INFO L225 Difference]: With dead ends: 278 [2022-07-19 15:26:15,744 INFO L226 Difference]: Without dead ends: 276 [2022-07-19 15:26:15,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:26:15,745 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:26:15,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 152 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:26:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-19 15:26:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-07-19 15:26:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 87 states have call successors, (87), 13 states have call predecessors, (87), 13 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-19 15:26:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 353 transitions. [2022-07-19 15:26:15,792 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 353 transitions. Word has length 59 [2022-07-19 15:26:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:26:15,792 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 353 transitions. [2022-07-19 15:26:15,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-19 15:26:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 353 transitions. [2022-07-19 15:26:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 15:26:15,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:26:15,794 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:26:15,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 15:26:16,026 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,SelfDestructingSolverStorable11 [2022-07-19 15:26:16,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:26:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:26:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2022-07-19 15:26:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:26:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697113333] [2022-07-19 15:26:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:26:16,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:26:16,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:26:16,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892651826] [2022-07-19 15:26:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:26:16,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:26:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:26:16,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:26:16,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 15:26:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:26:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 15:26:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:26:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:26:16,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:26:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-19 15:26:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:26:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697113333] [2022-07-19 15:26:16,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:26:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892651826] [2022-07-19 15:26:16,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892651826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:26:16,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:26:16,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-19 15:26:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070038011] [2022-07-19 15:26:16,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:26:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:26:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:26:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:26:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:26:16,341 INFO L87 Difference]: Start difference. First operand 251 states and 353 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 15:26:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:26:16,772 INFO L93 Difference]: Finished difference Result 300 states and 419 transitions. [2022-07-19 15:26:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 15:26:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-07-19 15:26:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:26:16,775 INFO L225 Difference]: With dead ends: 300 [2022-07-19 15:26:16,775 INFO L226 Difference]: Without dead ends: 298 [2022-07-19 15:26:16,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-19 15:26:16,776 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:26:16,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 248 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:26:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-19 15:26:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 263. [2022-07-19 15:26:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 159 states have (on average 1.1886792452830188) internal successors, (189), 166 states have internal predecessors, (189), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-19 15:26:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 362 transitions. [2022-07-19 15:26:16,861 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 362 transitions. Word has length 57 [2022-07-19 15:26:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:26:16,862 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 362 transitions. [2022-07-19 15:26:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 15:26:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 362 transitions. [2022-07-19 15:26:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 15:26:16,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:26:16,863 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:26:16,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 15:26:17,080 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,SelfDestructingSolverStorable12 [2022-07-19 15:26:17,081 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:26:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:26:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2022-07-19 15:26:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:26:17,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040390614] [2022-07-19 15:26:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:26:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:26:17,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:26:17,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883520487] [2022-07-19 15:26:17,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:26:17,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:26:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:26:17,089 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) [2022-07-19 15:26:17,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 15:26:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:26:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:26:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:26:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:26:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 15:26:17,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:26:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:26:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040390614] [2022-07-19 15:26:17,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:26:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883520487] [2022-07-19 15:26:17,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883520487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:26:17,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:26:17,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:26:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576230546] [2022-07-19 15:26:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:26:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:26:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:26:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:26:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:26:17,166 INFO L87 Difference]: Start difference. First operand 263 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 15:26:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:26:17,259 INFO L93 Difference]: Finished difference Result 457 states and 635 transitions. [2022-07-19 15:26:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:26:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-19 15:26:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:26:17,261 INFO L225 Difference]: With dead ends: 457 [2022-07-19 15:26:17,261 INFO L226 Difference]: Without dead ends: 287 [2022-07-19 15:26:17,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:26:17,263 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:26:17,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:26:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-19 15:26:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 272. [2022-07-19 15:26:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 169 states have internal predecessors, (200), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-19 15:26:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 373 transitions. [2022-07-19 15:26:17,309 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 373 transitions. Word has length 62 [2022-07-19 15:26:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:26:17,310 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 373 transitions. [2022-07-19 15:26:17,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 15:26:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 373 transitions. [2022-07-19 15:26:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 15:26:17,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:26:17,311 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:26:17,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 15:26:17,527 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,SelfDestructingSolverStorable13 [2022-07-19 15:26:17,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:26:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:26:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2022-07-19 15:26:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:26:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149358986] [2022-07-19 15:26:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:26:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:26:17,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:26:17,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407382762] [2022-07-19 15:26:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:26:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:26:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:26:17,536 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) [2022-07-19 15:26:17,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 15:26:17,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:26:17,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:26:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-19 15:26:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:26:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:26:18,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:26:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:26:25,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:26:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149358986] [2022-07-19 15:26:25,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:26:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407382762] [2022-07-19 15:26:25,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407382762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:26:25,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:26:25,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-07-19 15:26:25,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156006950] [2022-07-19 15:26:25,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:26:25,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 15:26:25,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:26:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 15:26:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=638, Unknown=1, NotChecked=0, Total=756 [2022-07-19 15:26:25,439 INFO L87 Difference]: Start difference. First operand 272 states and 373 transitions. Second operand has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-19 15:26:51,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:27:12,693 INFO L93 Difference]: Finished difference Result 396 states and 534 transitions. [2022-07-19 15:27:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 15:27:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 62 [2022-07-19 15:27:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:27:12,695 INFO L225 Difference]: With dead ends: 396 [2022-07-19 15:27:12,695 INFO L226 Difference]: Without dead ends: 394 [2022-07-19 15:27:12,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=1101, Invalid=4448, Unknown=1, NotChecked=0, Total=5550 [2022-07-19 15:27:12,697 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 211 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:27:12,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 372 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1388 Invalid, 0 Unknown, 325 Unchecked, 14.2s Time] [2022-07-19 15:27:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-19 15:27:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2022-07-19 15:27:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 236 states have (on average 1.1694915254237288) internal successors, (276), 240 states have internal predecessors, (276), 113 states have call successors, (113), 22 states have call predecessors, (113), 22 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2022-07-19 15:27:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 501 transitions. [2022-07-19 15:27:12,789 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 501 transitions. Word has length 62 [2022-07-19 15:27:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:27:12,789 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 501 transitions. [2022-07-19 15:27:12,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-19 15:27:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 501 transitions. [2022-07-19 15:27:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 15:27:12,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:27:12,790 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 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, 1, 1, 1] [2022-07-19 15:27:12,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 15:27:13,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:27:13,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:27:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:27:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2022-07-19 15:27:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:27:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782739876] [2022-07-19 15:27:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:27:13,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:27:13,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:27:13,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982640501] [2022-07-19 15:27:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:27:13,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:27:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:27:13,021 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) [2022-07-19 15:27:13,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 15:27:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:27:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-19 15:27:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:27:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 15:27:13,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:27:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-19 15:27:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:27:14,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782739876] [2022-07-19 15:27:14,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:27:14,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982640501] [2022-07-19 15:27:14,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982640501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:27:14,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:27:14,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-19 15:27:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777483169] [2022-07-19 15:27:14,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:27:14,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 15:27:14,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:27:14,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 15:27:14,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-07-19 15:27:14,921 INFO L87 Difference]: Start difference. First operand 372 states and 501 transitions. Second operand has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-19 15:27:16,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:24,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:26,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:34,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:37,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:40,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:43,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:44,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:52,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:54,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:56,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:27:58,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:01,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:03,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:09,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:11,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:13,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:15,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:28:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:28:17,264 INFO L93 Difference]: Finished difference Result 624 states and 884 transitions. [2022-07-19 15:28:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-19 15:28:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 76 [2022-07-19 15:28:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:28:17,268 INFO L225 Difference]: With dead ends: 624 [2022-07-19 15:28:17,268 INFO L226 Difference]: Without dead ends: 620 [2022-07-19 15:28:17,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1073, Invalid=5247, Unknown=0, NotChecked=0, Total=6320 [2022-07-19 15:28:17,270 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 195 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 495 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:28:17,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 404 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1942 Invalid, 12 Unknown, 0 Unchecked, 46.9s Time] [2022-07-19 15:28:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-19 15:28:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 545. [2022-07-19 15:28:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 327 states have (on average 1.198776758409786) internal successors, (392), 331 states have internal predecessors, (392), 189 states have call successors, (189), 28 states have call predecessors, (189), 28 states have return successors, (188), 185 states have call predecessors, (188), 188 states have call successors, (188) [2022-07-19 15:28:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 769 transitions. [2022-07-19 15:28:17,444 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 769 transitions. Word has length 76 [2022-07-19 15:28:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:28:17,444 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 769 transitions. [2022-07-19 15:28:17,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-19 15:28:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 769 transitions. [2022-07-19 15:28:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 15:28:17,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:28:17,447 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:28:17,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 15:28:17,660 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,SelfDestructingSolverStorable15 [2022-07-19 15:28:17,660 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:28:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:28:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2022-07-19 15:28:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:28:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670413029] [2022-07-19 15:28:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:28:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:28:17,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:28:17,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563778088] [2022-07-19 15:28:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:28:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:28:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:28:17,675 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) [2022-07-19 15:28:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:28:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:28:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 15:28:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:28:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-19 15:28:18,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:28:18,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:28:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670413029] [2022-07-19 15:28:18,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:28:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563778088] [2022-07-19 15:28:18,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563778088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:28:18,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:28:18,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-19 15:28:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291644229] [2022-07-19 15:28:18,094 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:28:18,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:28:18,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:28:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:28:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:28:18,095 INFO L87 Difference]: Start difference. First operand 545 states and 769 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 15:28:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:28:18,586 INFO L93 Difference]: Finished difference Result 579 states and 817 transitions. [2022-07-19 15:28:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:28:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-07-19 15:28:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:28:18,588 INFO L225 Difference]: With dead ends: 579 [2022-07-19 15:28:18,589 INFO L226 Difference]: Without dead ends: 577 [2022-07-19 15:28:18,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:28:18,589 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 38 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:28:18,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 176 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:28:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-07-19 15:28:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 574. [2022-07-19 15:28:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 342 states have (on average 1.2017543859649122) internal successors, (411), 346 states have internal predecessors, (411), 201 states have call successors, (201), 30 states have call predecessors, (201), 30 states have return successors, (200), 197 states have call predecessors, (200), 200 states have call successors, (200) [2022-07-19 15:28:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 812 transitions. [2022-07-19 15:28:18,759 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 812 transitions. Word has length 79 [2022-07-19 15:28:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:28:18,759 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 812 transitions. [2022-07-19 15:28:18,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 15:28:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 812 transitions. [2022-07-19 15:28:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-19 15:28:18,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:28:18,761 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 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] [2022-07-19 15:28:18,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:28:18,978 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,SelfDestructingSolverStorable16 [2022-07-19 15:28:18,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:28:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:28:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2022-07-19 15:28:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:28:18,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239909122] [2022-07-19 15:28:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:28:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:28:18,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:28:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49570359] [2022-07-19 15:28:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:28:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:28:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:28:18,996 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) [2022-07-19 15:28:18,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:28:19,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:28:19,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:28:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:28:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:28:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 15:28:19,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:28:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 15:28:19,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:28:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239909122] [2022-07-19 15:28:19,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:28:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49570359] [2022-07-19 15:28:19,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49570359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:28:19,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:28:19,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-07-19 15:28:19,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296901225] [2022-07-19 15:28:19,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:28:19,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:28:19,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:28:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:28:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:28:19,189 INFO L87 Difference]: Start difference. First operand 574 states and 812 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 15:28:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:28:19,923 INFO L93 Difference]: Finished difference Result 683 states and 964 transitions. [2022-07-19 15:28:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 15:28:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2022-07-19 15:28:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:28:19,926 INFO L225 Difference]: With dead ends: 683 [2022-07-19 15:28:19,926 INFO L226 Difference]: Without dead ends: 676 [2022-07-19 15:28:19,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:28:19,927 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 65 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:28:19,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 315 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:28:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-19 15:28:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 546. [2022-07-19 15:28:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 320 states have (on average 1.209375) internal successors, (387), 323 states have internal predecessors, (387), 195 states have call successors, (195), 30 states have call predecessors, (195), 30 states have return successors, (194), 192 states have call predecessors, (194), 194 states have call successors, (194) [2022-07-19 15:28:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 776 transitions. [2022-07-19 15:28:20,099 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 776 transitions. Word has length 84 [2022-07-19 15:28:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:28:20,100 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 776 transitions. [2022-07-19 15:28:20,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 15:28:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 776 transitions. [2022-07-19 15:28:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 15:28:20,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:28:20,101 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:28:20,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 15:28:20,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 15:28:20,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:28:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:28:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2022-07-19 15:28:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:28:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834880338] [2022-07-19 15:28:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:28:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:28:20,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:28:20,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96577067] [2022-07-19 15:28:20,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:28:20,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:28:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:28:20,337 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) [2022-07-19 15:28:20,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:28:20,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:28:20,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:28:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-19 15:28:20,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:28:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 92 proven. 55 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-19 15:28:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:28:33,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:28:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834880338] [2022-07-19 15:28:33,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:28:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96577067] [2022-07-19 15:28:33,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96577067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:28:33,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:28:33,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-19 15:28:33,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178057434] [2022-07-19 15:28:33,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 15:28:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 15:28:33,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:28:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 15:28:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-07-19 15:28:33,759 INFO L87 Difference]: Start difference. First operand 546 states and 776 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 15:28:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:28:36,703 INFO L93 Difference]: Finished difference Result 632 states and 896 transitions. [2022-07-19 15:28:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:28:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 96 [2022-07-19 15:28:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:28:36,706 INFO L225 Difference]: With dead ends: 632 [2022-07-19 15:28:36,706 INFO L226 Difference]: Without dead ends: 629 [2022-07-19 15:28:36,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=185, Invalid=806, Unknown=1, NotChecked=0, Total=992 [2022-07-19 15:28:36,707 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:28:36,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 265 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 15:28:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-07-19 15:28:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 550. [2022-07-19 15:28:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 323 states have (on average 1.2074303405572755) internal successors, (390), 326 states have internal predecessors, (390), 195 states have call successors, (195), 31 states have call predecessors, (195), 31 states have return successors, (194), 192 states have call predecessors, (194), 194 states have call successors, (194) [2022-07-19 15:28:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 779 transitions. [2022-07-19 15:28:36,892 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 779 transitions. Word has length 96 [2022-07-19 15:28:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:28:36,892 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 779 transitions. [2022-07-19 15:28:36,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 15:28:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 779 transitions. [2022-07-19 15:28:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-19 15:28:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:28:36,894 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:28:36,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 15:28:37,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:28:37,105 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:28:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:28:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash -717331702, now seen corresponding path program 2 times [2022-07-19 15:28:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:28:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331359737] [2022-07-19 15:28:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:28:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:28:37,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:28:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935683606] [2022-07-19 15:28:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:28:37,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:28:37,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:28:37,121 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) [2022-07-19 15:28:37,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 15:28:37,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:28:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:28:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 15:28:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:28:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 112 proven. 50 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-19 15:28:40,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:28:48,926 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse0 (= |c_ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)))) (and (or (not .cse0) (not (= .cse1 0)) (let ((.cse2 (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~b~0#1|))) (and (or (not (= (mod .cse2 |c_ULTIMATE.start_main_~s~0#1|) 0)) (= |c_ULTIMATE.start_main_~s~0#1| 0)) (not (= .cse2 0))))) (or .cse0 (not (= (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~s~0#1| (div .cse1 |c_ULTIMATE.start_main_~r~0#1|))) |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse1 |c_ULTIMATE.start_main_~r~0#1|) 0))))) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~k~0#1|)) |c_ULTIMATE.start_main_~a~0#1|)) is different from true [2022-07-19 15:29:41,106 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse0 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0) (not (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0))))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))))) is different from true [2022-07-19 15:29:55,138 WARN L855 $PredicateComparison]: unable to prove that (and (or (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse0 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-07-19 15:30:09,175 WARN L833 $PredicateComparison]: unable to prove that (or (and (or (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse0 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (not (= |c___VERIFIER_assert_#in~cond| 0))) (= c___VERIFIER_assert_~cond 0)) is different from false [2022-07-19 15:30:11,178 WARN L855 $PredicateComparison]: unable to prove that (or (and (or (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse0 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (not (= |c___VERIFIER_assert_#in~cond| 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-07-19 15:30:25,211 WARN L855 $PredicateComparison]: unable to prove that (or (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse0 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true