./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 f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-f4b24e3 [2022-07-13 15:58:47,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:58:47,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:58:47,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:58:47,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:58:47,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:58:47,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:58:47,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:58:47,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:58:47,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:58:47,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:58:47,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:58:47,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:58:47,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:58:47,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:58:47,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:58:47,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:58:47,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:58:47,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:58:47,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:58:47,447 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:58:47,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:58:47,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:58:47,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:58:47,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:58:47,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:58:47,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:58:47,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:58:47,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:58:47,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:58:47,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:58:47,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:58:47,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:58:47,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:58:47,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:58:47,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:58:47,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:58:47,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:58:47,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:58:47,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:58:47,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:58:47,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:58:47,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:58:47,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:58:47,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:58:47,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:58:47,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:58:47,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:58:47,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:58:47,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:58:47,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:58:47,502 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:58:47,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:58:47,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:58:47,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:58:47,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:58:47,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:58:47,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:58:47,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:58:47,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:58:47,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:58:47,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:58:47,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:58:47,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:58:47,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:58:47,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:58:47,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:58:47,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:58:47,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:58:47,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:58:47,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:58:47,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:58:47,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:58:47,508 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:58:47,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:58:47,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:58:47,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2022-07-13 15:58:47,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:58:47,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:58:47,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:58:47,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:58:47,719 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:58:47,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-13 15:58:47,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5d26b5e/21cce5a4423c4afb8453ebd55345c110/FLAG7c7f8bc36 [2022-07-13 15:58:48,138 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:58:48,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-13 15:58:48,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5d26b5e/21cce5a4423c4afb8453ebd55345c110/FLAG7c7f8bc36 [2022-07-13 15:58:48,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5d26b5e/21cce5a4423c4afb8453ebd55345c110 [2022-07-13 15:58:48,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:58:48,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:58:48,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:58:48,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:58:48,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:58:48,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66206222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48, skipping insertion in model container [2022-07-13 15:58:48,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:58:48,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:58:48,377 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] [2022-07-13 15:58:48,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:58:48,419 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:58:48,431 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] [2022-07-13 15:58:48,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:58:48,456 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:58:48,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48 WrapperNode [2022-07-13 15:58:48,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:58:48,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:58:48,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:58:48,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:58:48,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,484 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-07-13 15:58:48,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:58:48,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:58:48,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:58:48,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:58:48,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:58:48,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:58:48,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:58:48,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:58:48,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (1/1) ... [2022-07-13 15:58:48,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:58:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:48,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:58:48,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:58:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:58:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 15:58:48,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 15:58:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:58:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:58:48,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:58:48,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 15:58:48,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 15:58:48,617 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:58:48,618 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:58:48,733 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:58:48,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:58:48,738 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 15:58:48,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:58:48 BoogieIcfgContainer [2022-07-13 15:58:48,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:58:48,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:58:48,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:58:48,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:58:48,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:58:48" (1/3) ... [2022-07-13 15:58:48,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b180a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:58:48, skipping insertion in model container [2022-07-13 15:58:48,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:58:48" (2/3) ... [2022-07-13 15:58:48,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b180a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:58:48, skipping insertion in model container [2022-07-13 15:58:48,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:58:48" (3/3) ... [2022-07-13 15:58:48,764 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-07-13 15:58:48,774 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:58:48,775 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:58:48,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:58:48,821 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@5b3442f5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4e602c32 [2022-07-13 15:58:48,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:58:48,828 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) [2022-07-13 15:58:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 15:58:48,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:48,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:58:48,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2022-07-13 15:58:48,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623103464] [2022-07-13 15:58:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:49,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:58:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:49,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 15:58:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:58:49,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623103464] [2022-07-13 15:58:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623103464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:58:49,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:58:49,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:58:49,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783273364] [2022-07-13 15:58:49,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:58:49,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:58:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:58:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:58:49,103 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) [2022-07-13 15:58:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:49,135 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2022-07-13 15:58:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:58:49,138 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 [2022-07-13 15:58:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:49,144 INFO L225 Difference]: With dead ends: 61 [2022-07-13 15:58:49,144 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 15:58:49,147 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 [2022-07-13 15:58:49,151 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 [2022-07-13 15:58:49,153 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] [2022-07-13 15:58:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 15:58:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-13 15:58:49,189 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) [2022-07-13 15:58:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-13 15:58:49,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2022-07-13 15:58:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:49,194 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-13 15:58:49,194 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) [2022-07-13 15:58:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-13 15:58:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 15:58:49,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:49,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:58:49,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:58:49,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2022-07-13 15:58:49,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:49,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520321635] [2022-07-13 15:58:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:49,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:49,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113636377] [2022-07-13 15:58:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:49,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:49,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:58:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:58:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:49,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:58:49,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520321635] [2022-07-13 15:58:49,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113636377] [2022-07-13 15:58:49,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113636377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:58:49,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:58:49,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:58:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256512038] [2022-07-13 15:58:49,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:58:49,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:58:49,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:58:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:58:49,407 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) [2022-07-13 15:58:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:49,547 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-07-13 15:58:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:58:49,549 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 [2022-07-13 15:58:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:49,551 INFO L225 Difference]: With dead ends: 47 [2022-07-13 15:58:49,552 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 15:58:49,552 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 [2022-07-13 15:58:49,553 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-13 15:58:49,554 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] [2022-07-13 15:58:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 15:58:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-07-13 15:58:49,565 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) [2022-07-13 15:58:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-13 15:58:49,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-07-13 15:58:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:49,568 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-13 15:58:49,569 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) [2022-07-13 15:58:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-13 15:58:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 15:58:49,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:49,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:58:49,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:49,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:49,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2022-07-13 15:58:49,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:49,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645831679] [2022-07-13 15:58:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:49,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:49,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:49,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632332175] [2022-07-13 15:58:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:49,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:49,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:49,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:49,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:58:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 15:58:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:50,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:58:50,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645831679] [2022-07-13 15:58:50,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632332175] [2022-07-13 15:58:50,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632332175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:58:50,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:58:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 15:58:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748862757] [2022-07-13 15:58:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:58:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:58:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:58:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:58:50,027 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) [2022-07-13 15:58:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:50,132 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-13 15:58:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:58:50,133 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 [2022-07-13 15:58:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:50,134 INFO L225 Difference]: With dead ends: 46 [2022-07-13 15:58:50,134 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 15:58:50,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:58:50,136 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-13 15:58:50,136 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] [2022-07-13 15:58:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 15:58:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-13 15:58:50,145 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) [2022-07-13 15:58:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-07-13 15:58:50,146 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-07-13 15:58:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:50,147 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-07-13 15:58:50,147 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) [2022-07-13 15:58:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-07-13 15:58:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 15:58:50,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:50,148 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] [2022-07-13 15:58:50,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:50,372 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 [2022-07-13 15:58:50,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2022-07-13 15:58:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750361341] [2022-07-13 15:58:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:50,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403113399] [2022-07-13 15:58:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:50,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:50,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:50,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:50,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:58:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 15:58:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:50,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:58:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:50,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750361341] [2022-07-13 15:58:50,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403113399] [2022-07-13 15:58:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403113399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:58:50,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:58:50,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-13 15:58:50,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363599193] [2022-07-13 15:58:50,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:58:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:58:50,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:58:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:58:50,539 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) [2022-07-13 15:58:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:50,714 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2022-07-13 15:58:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:58:50,715 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 [2022-07-13 15:58:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:50,719 INFO L225 Difference]: With dead ends: 96 [2022-07-13 15:58:50,719 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 15:58:50,720 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 [2022-07-13 15:58:50,723 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 [2022-07-13 15:58:50,724 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] [2022-07-13 15:58:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 15:58:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-13 15:58:50,747 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) [2022-07-13 15:58:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-07-13 15:58:50,748 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2022-07-13 15:58:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:50,748 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-07-13 15:58:50,749 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) [2022-07-13 15:58:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-07-13 15:58:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 15:58:50,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:50,750 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] [2022-07-13 15:58:50,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:50,950 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 [2022-07-13 15:58:50,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:50,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2022-07-13 15:58:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:50,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255851348] [2022-07-13 15:58:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:50,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:50,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855238633] [2022-07-13 15:58:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:50,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:50,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:58:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 15:58:51,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:51,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:58:51,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:51,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255851348] [2022-07-13 15:58:51,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:51,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855238633] [2022-07-13 15:58:51,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855238633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:58:51,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:58:51,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 15:58:51,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227119045] [2022-07-13 15:58:51,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:58:51,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:58:51,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:58:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:58:51,102 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) [2022-07-13 15:58:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:51,192 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-13 15:58:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:58:51,193 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 [2022-07-13 15:58:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:51,194 INFO L225 Difference]: With dead ends: 72 [2022-07-13 15:58:51,194 INFO L226 Difference]: Without dead ends: 70 [2022-07-13 15:58:51,194 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 [2022-07-13 15:58:51,195 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-13 15:58:51,195 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] [2022-07-13 15:58:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-13 15:58:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-07-13 15:58:51,216 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) [2022-07-13 15:58:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2022-07-13 15:58:51,217 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2022-07-13 15:58:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:51,218 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2022-07-13 15:58:51,218 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) [2022-07-13 15:58:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2022-07-13 15:58:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 15:58:51,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:51,219 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] [2022-07-13 15:58:51,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:51,438 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 [2022-07-13 15:58:51,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2022-07-13 15:58:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:51,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057406086] [2022-07-13 15:58:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:51,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643407115] [2022-07-13 15:58:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:51,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:51,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:58:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 15:58:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:51,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:58:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:58:51,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:51,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057406086] [2022-07-13 15:58:51,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:51,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643407115] [2022-07-13 15:58:51,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643407115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:58:51,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:58:51,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-07-13 15:58:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664919470] [2022-07-13 15:58:51,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:58:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 15:58:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 15:58:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:58:51,710 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) [2022-07-13 15:58:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:51,901 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2022-07-13 15:58:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:58:51,902 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 [2022-07-13 15:58:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:51,903 INFO L225 Difference]: With dead ends: 104 [2022-07-13 15:58:51,903 INFO L226 Difference]: Without dead ends: 102 [2022-07-13 15:58:51,903 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 [2022-07-13 15:58:51,904 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 [2022-07-13 15:58:51,904 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] [2022-07-13 15:58:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-13 15:58:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-07-13 15:58:51,917 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) [2022-07-13 15:58:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2022-07-13 15:58:51,918 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2022-07-13 15:58:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:51,918 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2022-07-13 15:58:51,918 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) [2022-07-13 15:58:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2022-07-13 15:58:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 15:58:51,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:51,919 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] [2022-07-13 15:58:51,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:52,125 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 [2022-07-13 15:58:52,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2022-07-13 15:58:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341856770] [2022-07-13 15:58:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:52,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:52,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640448954] [2022-07-13 15:58:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:52,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:52,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:52,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:52,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:58:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:58:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 15:58:52,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:58:52,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:52,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341856770] [2022-07-13 15:58:52,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:52,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640448954] [2022-07-13 15:58:52,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640448954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:58:52,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:58:52,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:58:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798673070] [2022-07-13 15:58:52,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:58:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:58:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:58:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:58:52,264 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) [2022-07-13 15:58:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:52,326 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2022-07-13 15:58:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:58:52,326 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 [2022-07-13 15:58:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:52,329 INFO L225 Difference]: With dead ends: 144 [2022-07-13 15:58:52,329 INFO L226 Difference]: Without dead ends: 142 [2022-07-13 15:58:52,330 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 [2022-07-13 15:58:52,330 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 [2022-07-13 15:58:52,331 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] [2022-07-13 15:58:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-13 15:58:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-07-13 15:58:52,365 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) [2022-07-13 15:58:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2022-07-13 15:58:52,368 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2022-07-13 15:58:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:52,369 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2022-07-13 15:58:52,369 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) [2022-07-13 15:58:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2022-07-13 15:58:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 15:58:52,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:52,373 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] [2022-07-13 15:58:52,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:52,587 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 [2022-07-13 15:58:52,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2022-07-13 15:58:52,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:52,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864491430] [2022-07-13 15:58:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:52,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:52,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:58:52,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982645428] [2022-07-13 15:58:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:52,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:52,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:52,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:58:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 15:58:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:58:52,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:58:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:58:53,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864491430] [2022-07-13 15:58:53,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:58:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982645428] [2022-07-13 15:58:53,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982645428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:58:53,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:58:53,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-07-13 15:58:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631082201] [2022-07-13 15:58:53,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:58:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 15:58:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 15:58:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:58:53,123 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) [2022-07-13 15:59:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:00,278 INFO L93 Difference]: Finished difference Result 258 states and 380 transitions. [2022-07-13 15:59:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 15:59:00,279 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 [2022-07-13 15:59:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:00,281 INFO L225 Difference]: With dead ends: 258 [2022-07-13 15:59:00,281 INFO L226 Difference]: Without dead ends: 256 [2022-07-13 15:59:00,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 15:59:00,282 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 168 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:59:00,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 246 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-13 15:59:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-13 15:59:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 204. [2022-07-13 15:59:00,328 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) [2022-07-13 15:59:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 293 transitions. [2022-07-13 15:59:00,331 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 293 transitions. Word has length 32 [2022-07-13 15:59:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:00,331 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 293 transitions. [2022-07-13 15:59:00,331 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) [2022-07-13 15:59:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 293 transitions. [2022-07-13 15:59:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 15:59:00,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:00,335 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] [2022-07-13 15:59:00,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:59:00,549 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 [2022-07-13 15:59:00,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2022-07-13 15:59:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:00,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469457062] [2022-07-13 15:59:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:00,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625464231] [2022-07-13 15:59:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:59:00,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:00,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:59:00,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:59:00,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:59:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:59:00,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:59:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:59:00,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:59:00,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:00,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469457062] [2022-07-13 15:59:00,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:00,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625464231] [2022-07-13 15:59:00,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625464231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:59:00,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:59:00,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:59:00,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045019261] [2022-07-13 15:59:00,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:59:00,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:59:00,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:59:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:59:00,639 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) [2022-07-13 15:59:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:00,739 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2022-07-13 15:59:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:59:00,739 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 [2022-07-13 15:59:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:00,740 INFO L225 Difference]: With dead ends: 247 [2022-07-13 15:59:00,740 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 15:59:00,742 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 [2022-07-13 15:59:00,742 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-13 15:59:00,742 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] [2022-07-13 15:59:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 15:59:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-07-13 15:59:00,760 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) [2022-07-13 15:59:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-07-13 15:59:00,761 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2022-07-13 15:59:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:00,761 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-07-13 15:59:00,761 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) [2022-07-13 15:59:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-07-13 15:59:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 15:59:00,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:00,762 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] [2022-07-13 15:59:00,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:59:00,963 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 [2022-07-13 15:59:00,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2022-07-13 15:59:00,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:00,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626352025] [2022-07-13 15:59:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:00,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:00,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:00,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859851384] [2022-07-13 15:59:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:00,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:59:00,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:59:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:59:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 15:59:01,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:59:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626352025] [2022-07-13 15:59:01,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859851384] [2022-07-13 15:59:01,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859851384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:59:01,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:59:01,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:59:01,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112726002] [2022-07-13 15:59:01,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:59:01,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:59:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:59:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:59:01,055 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) [2022-07-13 15:59:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:01,124 INFO L93 Difference]: Finished difference Result 187 states and 271 transitions. [2022-07-13 15:59:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:59:01,125 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 [2022-07-13 15:59:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:01,129 INFO L225 Difference]: With dead ends: 187 [2022-07-13 15:59:01,129 INFO L226 Difference]: Without dead ends: 185 [2022-07-13 15:59:01,129 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 [2022-07-13 15:59:01,130 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 [2022-07-13 15:59:01,131 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] [2022-07-13 15:59:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-13 15:59:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2022-07-13 15:59:01,162 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) [2022-07-13 15:59:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-07-13 15:59:01,164 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2022-07-13 15:59:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:01,164 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-07-13 15:59:01,164 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) [2022-07-13 15:59:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-07-13 15:59:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 15:59:01,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:01,165 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] [2022-07-13 15:59:01,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 15:59:01,387 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 [2022-07-13 15:59:01,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2022-07-13 15:59:01,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:01,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160181451] [2022-07-13 15:59:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:01,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:01,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:01,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248695130] [2022-07-13 15:59:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:01,404 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:59:01,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 15:59:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:01,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 15:59:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 15:59:01,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:59:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 15:59:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:03,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160181451] [2022-07-13 15:59:03,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:03,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248695130] [2022-07-13 15:59:03,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248695130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:59:03,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:59:03,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-07-13 15:59:03,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750685549] [2022-07-13 15:59:03,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:59:03,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 15:59:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 15:59:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 15:59:03,120 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) [2022-07-13 15:59:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:19,164 INFO L93 Difference]: Finished difference Result 408 states and 603 transitions. [2022-07-13 15:59:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 15:59:19,167 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 [2022-07-13 15:59:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:19,170 INFO L225 Difference]: With dead ends: 408 [2022-07-13 15:59:19,170 INFO L226 Difference]: Without dead ends: 305 [2022-07-13 15:59:19,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 15:59:19,172 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s 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, 6.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:59:19,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 197 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-07-13 15:59:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-13 15:59:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 247. [2022-07-13 15:59:19,244 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) [2022-07-13 15:59:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 350 transitions. [2022-07-13 15:59:19,246 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 350 transitions. Word has length 49 [2022-07-13 15:59:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:19,246 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 350 transitions. [2022-07-13 15:59:19,246 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) [2022-07-13 15:59:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 350 transitions. [2022-07-13 15:59:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 15:59:19,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:19,248 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] [2022-07-13 15:59:19,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 15:59:19,451 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 [2022-07-13 15:59:19,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2022-07-13 15:59:19,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:19,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905683699] [2022-07-13 15:59:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:19,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:19,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:19,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290637133] [2022-07-13 15:59:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:19,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:19,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:59:19,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 15:59:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 15:59:19,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-13 15:59:19,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:59:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 15:59:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:19,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905683699] [2022-07-13 15:59:19,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:19,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290637133] [2022-07-13 15:59:19,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290637133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:59:19,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:59:19,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2022-07-13 15:59:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88346226] [2022-07-13 15:59:19,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:59:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 15:59:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 15:59:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:59:19,760 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) [2022-07-13 15:59:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:20,156 INFO L93 Difference]: Finished difference Result 278 states and 394 transitions. [2022-07-13 15:59:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 15:59:20,156 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 [2022-07-13 15:59:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:20,159 INFO L225 Difference]: With dead ends: 278 [2022-07-13 15:59:20,159 INFO L226 Difference]: Without dead ends: 276 [2022-07-13 15:59:20,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-13 15:59:20,160 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:59:20,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 152 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:59:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-13 15:59:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-07-13 15:59:20,223 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) [2022-07-13 15:59:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 353 transitions. [2022-07-13 15:59:20,225 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 353 transitions. Word has length 59 [2022-07-13 15:59:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:20,225 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 353 transitions. [2022-07-13 15:59:20,225 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) [2022-07-13 15:59:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 353 transitions. [2022-07-13 15:59:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 15:59:20,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:20,226 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] [2022-07-13 15:59:20,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 15:59:20,439 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 [2022-07-13 15:59:20,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2022-07-13 15:59:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:20,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223778663] [2022-07-13 15:59:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:20,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798340474] [2022-07-13 15:59:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:20,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:20,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:20,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:59:20,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 15:59:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 15:59:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 15:59:20,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:59:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 15:59:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:20,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223778663] [2022-07-13 15:59:20,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:20,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798340474] [2022-07-13 15:59:20,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798340474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:59:20,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:59:20,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-13 15:59:20,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276050746] [2022-07-13 15:59:20,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:59:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 15:59:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 15:59:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:59:20,732 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) [2022-07-13 15:59:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:21,216 INFO L93 Difference]: Finished difference Result 300 states and 419 transitions. [2022-07-13 15:59:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 15:59:21,217 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 [2022-07-13 15:59:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:21,218 INFO L225 Difference]: With dead ends: 300 [2022-07-13 15:59:21,219 INFO L226 Difference]: Without dead ends: 298 [2022-07-13 15:59:21,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-13 15:59:21,220 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 [2022-07-13 15:59:21,220 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] [2022-07-13 15:59:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-13 15:59:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 263. [2022-07-13 15:59:21,282 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) [2022-07-13 15:59:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 362 transitions. [2022-07-13 15:59:21,284 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 362 transitions. Word has length 57 [2022-07-13 15:59:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:21,284 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 362 transitions. [2022-07-13 15:59:21,284 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) [2022-07-13 15:59:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 362 transitions. [2022-07-13 15:59:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 15:59:21,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:21,286 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] [2022-07-13 15:59:21,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 15:59:21,499 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 [2022-07-13 15:59:21,499 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2022-07-13 15:59:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282105173] [2022-07-13 15:59:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:21,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:21,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249440309] [2022-07-13 15:59:21,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:59:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:21,509 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) [2022-07-13 15:59:21,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 15:59:21,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:59:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:59:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 15:59:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 15:59:21,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:59:21,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282105173] [2022-07-13 15:59:21,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249440309] [2022-07-13 15:59:21,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249440309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:59:21,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:59:21,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:59:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715653240] [2022-07-13 15:59:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:59:21,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:59:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:59:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:59:21,587 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) [2022-07-13 15:59:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:21,691 INFO L93 Difference]: Finished difference Result 457 states and 635 transitions. [2022-07-13 15:59:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:59:21,691 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 [2022-07-13 15:59:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:21,693 INFO L225 Difference]: With dead ends: 457 [2022-07-13 15:59:21,693 INFO L226 Difference]: Without dead ends: 287 [2022-07-13 15:59:21,693 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 [2022-07-13 15:59:21,694 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 [2022-07-13 15:59:21,694 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] [2022-07-13 15:59:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-13 15:59:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 272. [2022-07-13 15:59:21,757 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) [2022-07-13 15:59:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 373 transitions. [2022-07-13 15:59:21,762 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 373 transitions. Word has length 62 [2022-07-13 15:59:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:21,762 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 373 transitions. [2022-07-13 15:59:21,762 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) [2022-07-13 15:59:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 373 transitions. [2022-07-13 15:59:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 15:59:21,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:21,764 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] [2022-07-13 15:59:21,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 15:59:21,971 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 [2022-07-13 15:59:21,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2022-07-13 15:59:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:21,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117045645] [2022-07-13 15:59:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:21,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 15:59:21,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074709620] [2022-07-13 15:59:21,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:59:21,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:21,981 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) [2022-07-13 15:59:21,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 15:59:22,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 15:59:22,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:59:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-13 15:59:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 15:59:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:59:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 15:59:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117045645] [2022-07-13 15:59:30,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 15:59:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074709620] [2022-07-13 15:59:30,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074709620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:59:30,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:59:30,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-07-13 15:59:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60252984] [2022-07-13 15:59:30,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:59:30,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 15:59:30,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 15:59:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=638, Unknown=1, NotChecked=0, Total=756 [2022-07-13 15:59:30,276 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) [2022-07-13 15:59:49,656 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 115 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:00:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:00:20,491 INFO L93 Difference]: Finished difference Result 396 states and 534 transitions. [2022-07-13 16:00:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 16:00:20,492 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 [2022-07-13 16:00:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:00:20,494 INFO L225 Difference]: With dead ends: 396 [2022-07-13 16:00:20,494 INFO L226 Difference]: Without dead ends: 394 [2022-07-13 16:00:20,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=1101, Invalid=4448, Unknown=1, NotChecked=0, Total=5550 [2022-07-13 16:00:20,496 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 211 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s 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, 12.9s IncrementalHoareTripleChecker+Time [2022-07-13 16:00:20,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 372 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1388 Invalid, 0 Unknown, 325 Unchecked, 12.9s Time] [2022-07-13 16:00:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-13 16:00:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2022-07-13 16:00:20,601 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) [2022-07-13 16:00:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 501 transitions. [2022-07-13 16:00:20,603 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 501 transitions. Word has length 62 [2022-07-13 16:00:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:00:20,603 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 501 transitions. [2022-07-13 16:00:20,603 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) [2022-07-13 16:00:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 501 transitions. [2022-07-13 16:00:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 16:00:20,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:00:20,605 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] [2022-07-13 16:00:20,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 16:00:20,819 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 [2022-07-13 16:00:20,819 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:00:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:00:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2022-07-13 16:00:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:00:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110688390] [2022-07-13 16:00:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:00:20,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:00:20,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:00:20,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513025505] [2022-07-13 16:00:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:00:20,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:00:20,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:00:20,829 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) [2022-07-13 16:00:20,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 16:00:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:00:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-13 16:00:20,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:00:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 16:00:21,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:00:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 16:00:22,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:00:22,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110688390] [2022-07-13 16:00:22,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:00:22,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513025505] [2022-07-13 16:00:22,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513025505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:00:22,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:00:22,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-13 16:00:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210812873] [2022-07-13 16:00:22,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:00:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 16:00:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:00:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 16:00:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-07-13 16:00:22,912 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) [2022-07-13 16:00:30,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:00:34,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:00:40,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:00:44,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:00:48,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:00:50,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:00:52,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:00,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:02,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:05,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:07,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:11,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:13,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:20,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:21,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:23,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:25,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:01:28,816 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 [] [2022-07-13 16:01:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:01:30,177 INFO L93 Difference]: Finished difference Result 583 states and 819 transitions. [2022-07-13 16:01:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 16:01:30,178 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 [2022-07-13 16:01:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:01:30,180 INFO L225 Difference]: With dead ends: 583 [2022-07-13 16:01:30,181 INFO L226 Difference]: Without dead ends: 579 [2022-07-13 16:01:30,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1046, Invalid=5116, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 16:01:30,183 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 198 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 499 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.4s IncrementalHoareTripleChecker+Time [2022-07-13 16:01:30,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 407 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1976 Invalid, 15 Unknown, 0 Unchecked, 50.4s Time] [2022-07-13 16:01:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-13 16:01:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 497. [2022-07-13 16:01:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 311 states have (on average 1.1832797427652733) internal successors, (368), 315 states have internal predecessors, (368), 157 states have call successors, (157), 28 states have call predecessors, (157), 28 states have return successors, (156), 153 states have call predecessors, (156), 156 states have call successors, (156) [2022-07-13 16:01:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 681 transitions. [2022-07-13 16:01:30,351 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 681 transitions. Word has length 76 [2022-07-13 16:01:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:01:30,351 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 681 transitions. [2022-07-13 16:01:30,351 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) [2022-07-13 16:01:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 681 transitions. [2022-07-13 16:01:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 16:01:30,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:01:30,353 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] [2022-07-13 16:01:30,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 16:01:30,563 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 [2022-07-13 16:01:30,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:01:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:01:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2022-07-13 16:01:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:01:30,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624069994] [2022-07-13 16:01:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:01:30,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:01:30,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:01:30,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927687961] [2022-07-13 16:01:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:01:30,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:01:30,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:01:30,573 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) [2022-07-13 16:01:30,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 16:01:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:01:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 16:01:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:01:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-13 16:01:30,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:01:31,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:01:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624069994] [2022-07-13 16:01:31,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:01:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927687961] [2022-07-13 16:01:31,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927687961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:01:31,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:01:31,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-13 16:01:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102821000] [2022-07-13 16:01:31,150 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:01:31,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:01:31,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:01:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:01:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:01:31,151 INFO L87 Difference]: Start difference. First operand 497 states and 681 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) [2022-07-13 16:01:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:01:31,620 INFO L93 Difference]: Finished difference Result 531 states and 729 transitions. [2022-07-13 16:01:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 16:01:31,621 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 [2022-07-13 16:01:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:01:31,622 INFO L225 Difference]: With dead ends: 531 [2022-07-13 16:01:31,622 INFO L226 Difference]: Without dead ends: 529 [2022-07-13 16:01:31,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-13 16:01:31,623 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:01:31,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 209 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:01:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-07-13 16:01:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 526. [2022-07-13 16:01:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 326 states have (on average 1.187116564417178) internal successors, (387), 330 states have internal predecessors, (387), 169 states have call successors, (169), 30 states have call predecessors, (169), 30 states have return successors, (168), 165 states have call predecessors, (168), 168 states have call successors, (168) [2022-07-13 16:01:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 724 transitions. [2022-07-13 16:01:31,784 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 724 transitions. Word has length 79 [2022-07-13 16:01:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:01:31,784 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 724 transitions. [2022-07-13 16:01:31,784 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) [2022-07-13 16:01:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 724 transitions. [2022-07-13 16:01:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 16:01:31,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:01:31,785 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] [2022-07-13 16:01:31,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 16:01:31,999 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 [2022-07-13 16:01:31,999 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:01:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:01:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2022-07-13 16:01:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:01:32,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088761181] [2022-07-13 16:01:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:01:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:01:32,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:01:32,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661203602] [2022-07-13 16:01:32,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:01:32,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:01:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:01:32,012 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) [2022-07-13 16:01:32,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 16:01:32,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:01:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:01:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 16:01:32,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:01:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-13 16:01:32,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:01:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-13 16:01:32,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:01:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088761181] [2022-07-13 16:01:32,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:01:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661203602] [2022-07-13 16:01:32,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661203602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:01:32,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:01:32,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-07-13 16:01:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933085345] [2022-07-13 16:01:32,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:01:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 16:01:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:01:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 16:01:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:01:32,206 INFO L87 Difference]: Start difference. First operand 526 states and 724 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) [2022-07-13 16:01:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:01:32,877 INFO L93 Difference]: Finished difference Result 618 states and 849 transitions. [2022-07-13 16:01:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 16:01:32,878 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 [2022-07-13 16:01:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:01:32,881 INFO L225 Difference]: With dead ends: 618 [2022-07-13 16:01:32,881 INFO L226 Difference]: Without dead ends: 611 [2022-07-13 16:01:32,882 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 [2022-07-13 16:01:32,882 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 [2022-07-13 16:01:32,882 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] [2022-07-13 16:01:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-07-13 16:01:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 498. [2022-07-13 16:01:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 304 states have (on average 1.194078947368421) internal successors, (363), 307 states have internal predecessors, (363), 163 states have call successors, (163), 30 states have call predecessors, (163), 30 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2022-07-13 16:01:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 688 transitions. [2022-07-13 16:01:33,057 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 688 transitions. Word has length 84 [2022-07-13 16:01:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:01:33,058 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 688 transitions. [2022-07-13 16:01:33,058 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) [2022-07-13 16:01:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 688 transitions. [2022-07-13 16:01:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-13 16:01:33,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:01:33,060 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] [2022-07-13 16:01:33,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 16:01:33,279 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 [2022-07-13 16:01:33,280 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:01:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:01:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2022-07-13 16:01:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:01:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188125280] [2022-07-13 16:01:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:01:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:01:33,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:01:33,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905620444] [2022-07-13 16:01:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:01:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:01:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:01:33,290 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) [2022-07-13 16:01:33,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 16:01:33,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:01:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:01:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-13 16:01:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:01:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 92 proven. 55 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-13 16:01:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:01:45,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:01:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188125280] [2022-07-13 16:01:45,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:01:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905620444] [2022-07-13 16:01:45,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905620444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:01:45,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:01:45,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-13 16:01:45,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275936073] [2022-07-13 16:01:45,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:01:45,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 16:01:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:01:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 16:01:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-07-13 16:01:45,968 INFO L87 Difference]: Start difference. First operand 498 states and 688 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) [2022-07-13 16:01:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:01:48,107 INFO L93 Difference]: Finished difference Result 572 states and 786 transitions. [2022-07-13 16:01:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 16:01:48,108 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 [2022-07-13 16:01:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:01:48,110 INFO L225 Difference]: With dead ends: 572 [2022-07-13 16:01:48,110 INFO L226 Difference]: Without dead ends: 569 [2022-07-13 16:01:48,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=185, Invalid=806, Unknown=1, NotChecked=0, Total=992 [2022-07-13 16:01:48,111 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:01:48,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 278 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 16:01:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-07-13 16:01:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 502. [2022-07-13 16:01:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 307 states have (on average 1.1921824104234529) internal successors, (366), 310 states have internal predecessors, (366), 163 states have call successors, (163), 31 states have call predecessors, (163), 31 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2022-07-13 16:01:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 691 transitions. [2022-07-13 16:01:48,324 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 691 transitions. Word has length 96 [2022-07-13 16:01:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:01:48,324 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 691 transitions. [2022-07-13 16:01:48,324 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) [2022-07-13 16:01:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 691 transitions. [2022-07-13 16:01:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-13 16:01:48,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:01:48,326 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] [2022-07-13 16:01:48,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 16:01:48,539 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 [2022-07-13 16:01:48,539 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:01:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:01:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash -717331702, now seen corresponding path program 2 times [2022-07-13 16:01:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:01:48,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336293579] [2022-07-13 16:01:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:01:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:01:48,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:01:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982894064] [2022-07-13 16:01:48,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:01:48,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:01:48,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:01:48,554 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) [2022-07-13 16:01:48,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 16:01:48,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:01:48,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:01:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 16:01:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:01:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 112 proven. 50 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-13 16:01:50,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:02:26,430 WARN L233 SmtUtils]: Spent 17.51s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)