./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:42:30,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:42:30,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:42:30,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:42:30,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:42:30,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:42:30,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:42:30,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:42:30,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:42:30,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:42:30,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:42:30,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:42:30,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:42:30,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:42:30,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:42:30,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:42:30,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:42:30,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:42:30,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:42:30,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:42:30,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:42:30,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:42:30,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:42:30,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:42:30,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:42:30,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:42:30,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:42:30,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:42:30,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:42:30,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:42:30,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:42:30,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:42:30,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:42:30,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:42:30,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:42:30,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:42:30,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:42:30,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:42:30,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:42:30,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:42:30,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:42:30,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:42:30,647 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:42:30,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:42:30,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:42:30,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:42:30,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:42:30,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:42:30,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:42:30,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:42:30,650 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:42:30,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:42:30,651 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:42:30,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:42:30,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:42:30,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:42:30,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:42:30,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:42:30,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:42:30,652 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:42:30,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:42:30,652 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:42:30,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:42:30,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:42:30,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:42:30,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:42:30,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:42:30,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:42:30,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:42:30,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:42:30,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:42:30,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:42:30,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:42:30,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:42:30,655 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:42:30,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:42:30,655 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:42:30,655 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2023-02-15 20:42:30,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:42:30,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:42:30,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:42:30,950 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:42:30,950 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:42:30,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2023-02-15 20:42:32,050 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:42:32,231 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:42:32,242 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2023-02-15 20:42:32,278 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb5b73f9c/a732532f3e7a4fd99305e57b60478c7f/FLAGae758824d [2023-02-15 20:42:32,300 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb5b73f9c/a732532f3e7a4fd99305e57b60478c7f [2023-02-15 20:42:32,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:42:32,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:42:32,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:42:32,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:42:32,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:42:32,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736d3321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32, skipping insertion in model container [2023-02-15 20:42:32,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:42:32,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:42:32,453 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2023-02-15 20:42:32,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:42:32,487 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:42:32,498 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2023-02-15 20:42:32,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:42:32,519 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:42:32,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32 WrapperNode [2023-02-15 20:42:32,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:42:32,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:42:32,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:42:32,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:42:32,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,545 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2023-02-15 20:42:32,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:42:32,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:42:32,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:42:32,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:42:32,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:42:32,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:42:32,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:42:32,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:42:32,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (1/1) ... [2023-02-15 20:42:32,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:42:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:32,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 20:42:32,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 20:42:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:42:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:42:32,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:42:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:42:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:42:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:42:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:42:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:42:32,683 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:42:32,685 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:42:32,826 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:42:32,831 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:42:32,831 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 20:42:32,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:42:32 BoogieIcfgContainer [2023-02-15 20:42:32,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:42:32,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:42:32,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:42:32,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:42:32,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:42:32" (1/3) ... [2023-02-15 20:42:32,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:42:32, skipping insertion in model container [2023-02-15 20:42:32,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:42:32" (2/3) ... [2023-02-15 20:42:32,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:42:32, skipping insertion in model container [2023-02-15 20:42:32,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:42:32" (3/3) ... [2023-02-15 20:42:32,853 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2023-02-15 20:42:32,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:42:32,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:42:32,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:42:32,931 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@64a6276d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:42:32,931 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:42:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 20:42:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:42:32,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:32,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:32,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2023-02-15 20:42:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288571525] [2023-02-15 20:42:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:32,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288571525] [2023-02-15 20:42:33,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 20:42:33,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894284233] [2023-02-15 20:42:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:33,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:33,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:33,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:33,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:42:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:42:33,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:42:33,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:42:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894284233] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:42:33,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:42:33,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:42:33,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965404401] [2023-02-15 20:42:33,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:42:33,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:42:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:42:33,276 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:42:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:33,300 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2023-02-15 20:42:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:42:33,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-02-15 20:42:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:33,309 INFO L225 Difference]: With dead ends: 65 [2023-02-15 20:42:33,309 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 20:42:33,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:42:33,318 INFO L413 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:33,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 20:42:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 20:42:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:42:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-02-15 20:42:33,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2023-02-15 20:42:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:33,355 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-02-15 20:42:33,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:42:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-02-15 20:42:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 20:42:33,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:33,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:33,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 20:42:33,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2023-02-15 20:42:33,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:33,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597352032] [2023-02-15 20:42:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:33,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:33,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:33,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625964191] [2023-02-15 20:42:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:33,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:33,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:33,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:33,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:42:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:33,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:42:33,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:42:33,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:42:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597352032] [2023-02-15 20:42:33,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625964191] [2023-02-15 20:42:33,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625964191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:42:33,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:42:33,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:42:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212169353] [2023-02-15 20:42:33,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:42:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:42:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:42:33,736 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:42:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:33,754 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-02-15 20:42:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:42:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-02-15 20:42:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:33,755 INFO L225 Difference]: With dead ends: 40 [2023-02-15 20:42:33,755 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 20:42:33,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:42:33,757 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:33,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 20:42:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 20:42:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:42:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-02-15 20:42:33,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-02-15 20:42:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:33,768 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-02-15 20:42:33,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:42:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-02-15 20:42:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:42:33,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:33,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:33,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:33,975 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,SelfDestructingSolverStorable1 [2023-02-15 20:42:33,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2023-02-15 20:42:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565467301] [2023-02-15 20:42:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:33,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:33,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100486097] [2023-02-15 20:42:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:33,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:33,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:42:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:34,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:42:34,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:42:34,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:42:34,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:34,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565467301] [2023-02-15 20:42:34,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:34,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100486097] [2023-02-15 20:42:34,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100486097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:34,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:34,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 20:42:34,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271673988] [2023-02-15 20:42:34,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:34,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:42:34,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:34,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:42:34,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:42:34,175 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:42:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:34,270 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2023-02-15 20:42:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:42:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-15 20:42:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:34,273 INFO L225 Difference]: With dead ends: 49 [2023-02-15 20:42:34,273 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 20:42:34,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:42:34,277 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:34,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:42:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 20:42:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-15 20:42:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:42:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-15 20:42:34,291 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2023-02-15 20:42:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:34,292 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-15 20:42:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:42:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-15 20:42:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 20:42:34,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:34,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:34,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:34,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:34,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2023-02-15 20:42:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:34,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509793789] [2023-02-15 20:42:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:34,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451757379] [2023-02-15 20:42:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:34,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:34,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:34,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:34,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:42:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:42:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:42:34,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:42:34,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:34,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509793789] [2023-02-15 20:42:34,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:34,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451757379] [2023-02-15 20:42:34,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451757379] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:42:34,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:42:34,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 20:42:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892054941] [2023-02-15 20:42:34,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:34,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:42:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:42:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:42:34,757 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:42:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:34,800 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-15 20:42:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:42:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-02-15 20:42:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:34,803 INFO L225 Difference]: With dead ends: 39 [2023-02-15 20:42:34,803 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 20:42:34,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:42:34,804 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:34,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 20:42:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 20:42:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:42:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-15 20:42:34,813 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2023-02-15 20:42:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:34,813 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-15 20:42:34,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:42:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-15 20:42:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:42:34,815 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:34,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:34,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:35,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:35,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2023-02-15 20:42:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167139559] [2023-02-15 20:42:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:35,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:35,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618804721] [2023-02-15 20:42:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:35,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:35,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:35,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:35,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:42:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:42:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:42:35,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:42:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167139559] [2023-02-15 20:42:35,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618804721] [2023-02-15 20:42:35,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618804721] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:42:35,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:42:35,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:42:35,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926641979] [2023-02-15 20:42:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:35,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:42:35,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:42:35,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:42:35,166 INFO L87 Difference]: Start difference. First operand 37 states and 47 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:42:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:35,200 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-02-15 20:42:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:42:35,200 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), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-02-15 20:42:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:35,202 INFO L225 Difference]: With dead ends: 62 [2023-02-15 20:42:35,202 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 20:42:35,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:42:35,205 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:35,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 20:42:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 20:42:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:42:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-15 20:42:35,213 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2023-02-15 20:42:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:35,213 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-15 20:42:35,214 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:42:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-15 20:42:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:42:35,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:35,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:35,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:35,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:35,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:35,423 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2023-02-15 20:42:35,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079402938] [2023-02-15 20:42:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:35,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:35,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:35,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429563167] [2023-02-15 20:42:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:35,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:35,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:35,434 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:35,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:42:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:42:35,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:42:35,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:42:35,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:35,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079402938] [2023-02-15 20:42:35,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:35,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429563167] [2023-02-15 20:42:35,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429563167] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:42:35,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:42:35,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 20:42:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754948763] [2023-02-15 20:42:35,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:35,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:42:35,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:42:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:42:35,794 INFO L87 Difference]: Start difference. First operand 39 states and 49 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) [2023-02-15 20:42:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:35,838 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-02-15 20:42:35,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:42:35,838 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 [2023-02-15 20:42:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:35,839 INFO L225 Difference]: With dead ends: 53 [2023-02-15 20:42:35,839 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 20:42:35,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:42:35,840 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:35,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 20:42:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-02-15 20:42:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:42:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-02-15 20:42:35,851 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2023-02-15 20:42:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:35,851 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-02-15 20:42:35,851 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) [2023-02-15 20:42:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-02-15 20:42:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 20:42:35,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:35,852 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2023-02-15 20:42:35,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:36,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:36,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2023-02-15 20:42:36,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:36,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042034379] [2023-02-15 20:42:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:36,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:36,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79733344] [2023-02-15 20:42:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:36,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:36,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:36,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:36,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:42:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:42:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:42:36,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:42:36,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:36,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042034379] [2023-02-15 20:42:36,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:36,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79733344] [2023-02-15 20:42:36,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79733344] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:42:36,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:42:36,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 20:42:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178253123] [2023-02-15 20:42:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:42:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:36,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:42:36,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:42:36,380 INFO L87 Difference]: Start difference. First operand 50 states and 65 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:42:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:36,428 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-15 20:42:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:42:36,428 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-02-15 20:42:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:36,429 INFO L225 Difference]: With dead ends: 57 [2023-02-15 20:42:36,429 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 20:42:36,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:42:36,430 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:36,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 20:42:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-02-15 20:42:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:42:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2023-02-15 20:42:36,441 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2023-02-15 20:42:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:36,441 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2023-02-15 20:42:36,441 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:42:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2023-02-15 20:42:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:42:36,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:36,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2023-02-15 20:42:36,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:36,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:36,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2023-02-15 20:42:36,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:36,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870579674] [2023-02-15 20:42:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:36,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:36,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995175724] [2023-02-15 20:42:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:36,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:36,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:36,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:42:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:42:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 20:42:36,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:37,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870579674] [2023-02-15 20:42:37,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995175724] [2023-02-15 20:42:37,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995175724] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:42:37,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:42:37,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 20:42:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701350707] [2023-02-15 20:42:37,034 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:42:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:42:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:42:37,035 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:42:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:37,196 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-02-15 20:42:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 20:42:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-02-15 20:42:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:37,197 INFO L225 Difference]: With dead ends: 61 [2023-02-15 20:42:37,197 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 20:42:37,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:42:37,198 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:37,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 121 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:42:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 20:42:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-02-15 20:42:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:42:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-02-15 20:42:37,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2023-02-15 20:42:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:37,210 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-02-15 20:42:37,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:42:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-02-15 20:42:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 20:42:37,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:37,211 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2023-02-15 20:42:37,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:37,416 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,SelfDestructingSolverStorable7 [2023-02-15 20:42:37,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2023-02-15 20:42:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:37,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816989477] [2023-02-15 20:42:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:37,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:37,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017884877] [2023-02-15 20:42:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:37,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:37,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:37,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:42:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:37,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:42:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:42:37,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:42:37,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816989477] [2023-02-15 20:42:37,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:37,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017884877] [2023-02-15 20:42:37,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017884877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:37,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:37,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:42:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714327864] [2023-02-15 20:42:37,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:42:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:42:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:42:37,631 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:42:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:37,773 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2023-02-15 20:42:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:42:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2023-02-15 20:42:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:37,776 INFO L225 Difference]: With dead ends: 211 [2023-02-15 20:42:37,776 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 20:42:37,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:42:37,778 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 72 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:37,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 203 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:42:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 20:42:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2023-02-15 20:42:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-15 20:42:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2023-02-15 20:42:37,819 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2023-02-15 20:42:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:37,820 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2023-02-15 20:42:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:42:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2023-02-15 20:42:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 20:42:37,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:37,821 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1] [2023-02-15 20:42:37,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:38,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:38,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:38,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2023-02-15 20:42:38,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:38,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549854182] [2023-02-15 20:42:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:38,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:38,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266350848] [2023-02-15 20:42:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:38,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:38,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:38,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:42:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:38,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:42:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:42:38,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:42:38,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549854182] [2023-02-15 20:42:38,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266350848] [2023-02-15 20:42:38,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266350848] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:38,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:38,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 20:42:38,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161551104] [2023-02-15 20:42:38,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:42:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:38,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:42:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:42:38,264 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:42:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:38,503 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2023-02-15 20:42:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:42:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2023-02-15 20:42:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:38,505 INFO L225 Difference]: With dead ends: 279 [2023-02-15 20:42:38,505 INFO L226 Difference]: Without dead ends: 259 [2023-02-15 20:42:38,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:42:38,506 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:38,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 286 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:42:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-15 20:42:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2023-02-15 20:42:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-15 20:42:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2023-02-15 20:42:38,542 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2023-02-15 20:42:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:38,542 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2023-02-15 20:42:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:42:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2023-02-15 20:42:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:42:38,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:38,544 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1] [2023-02-15 20:42:38,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:38,748 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,SelfDestructingSolverStorable9 [2023-02-15 20:42:38,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2023-02-15 20:42:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:38,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809328154] [2023-02-15 20:42:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:38,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:38,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397015361] [2023-02-15 20:42:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:38,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:38,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:38,760 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:38,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:42:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:42:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:42:38,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:42:38,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809328154] [2023-02-15 20:42:38,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397015361] [2023-02-15 20:42:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397015361] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:38,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:38,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:42:38,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534712459] [2023-02-15 20:42:38,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:38,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:42:38,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:38,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:42:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:42:38,950 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:42:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:39,107 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2023-02-15 20:42:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:42:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2023-02-15 20:42:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:39,109 INFO L225 Difference]: With dead ends: 344 [2023-02-15 20:42:39,109 INFO L226 Difference]: Without dead ends: 248 [2023-02-15 20:42:39,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:42:39,111 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:39,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 241 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:42:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-15 20:42:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-02-15 20:42:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-15 20:42:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2023-02-15 20:42:39,140 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2023-02-15 20:42:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:39,141 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2023-02-15 20:42:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:42:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2023-02-15 20:42:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 20:42:39,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:39,142 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1] [2023-02-15 20:42:39,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:39,347 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,SelfDestructingSolverStorable10 [2023-02-15 20:42:39,347 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2023-02-15 20:42:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:39,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625533152] [2023-02-15 20:42:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:39,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:39,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809703019] [2023-02-15 20:42:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:39,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:39,369 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:39,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:42:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:42:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 20:42:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 20:42:39,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:39,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625533152] [2023-02-15 20:42:39,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:39,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809703019] [2023-02-15 20:42:39,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809703019] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:39,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:39,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 20:42:39,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140130276] [2023-02-15 20:42:39,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:42:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:42:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:42:39,779 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:42:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:40,241 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2023-02-15 20:42:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:42:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2023-02-15 20:42:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:40,245 INFO L225 Difference]: With dead ends: 330 [2023-02-15 20:42:40,245 INFO L226 Difference]: Without dead ends: 324 [2023-02-15 20:42:40,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:42:40,247 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:40,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 355 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:42:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-02-15 20:42:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2023-02-15 20:42:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-15 20:42:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2023-02-15 20:42:40,284 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2023-02-15 20:42:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:40,284 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2023-02-15 20:42:40,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:42:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2023-02-15 20:42:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 20:42:40,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:40,286 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2023-02-15 20:42:40,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:40,490 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,SelfDestructingSolverStorable11 [2023-02-15 20:42:40,491 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2023-02-15 20:42:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:40,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097039599] [2023-02-15 20:42:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:40,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:40,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724262774] [2023-02-15 20:42:40,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:42:40,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:40,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:40,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:42:40,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:42:40,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:42:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 20:42:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 20:42:40,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:41,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:41,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097039599] [2023-02-15 20:42:41,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:41,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724262774] [2023-02-15 20:42:41,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724262774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:42:41,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:42:41,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-15 20:42:41,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528583260] [2023-02-15 20:42:41,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:41,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:42:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:42:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:42:41,174 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 20:42:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:41,578 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2023-02-15 20:42:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:42:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2023-02-15 20:42:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:41,580 INFO L225 Difference]: With dead ends: 315 [2023-02-15 20:42:41,580 INFO L226 Difference]: Without dead ends: 313 [2023-02-15 20:42:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:42:41,581 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 66 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:41,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 195 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:42:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-02-15 20:42:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2023-02-15 20:42:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-15 20:42:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2023-02-15 20:42:41,632 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2023-02-15 20:42:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:41,632 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2023-02-15 20:42:41,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 20:42:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2023-02-15 20:42:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 20:42:41,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:41,635 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2023-02-15 20:42:41,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 20:42:41,841 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,SelfDestructingSolverStorable12 [2023-02-15 20:42:41,841 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2023-02-15 20:42:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:41,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247916185] [2023-02-15 20:42:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:41,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874594151] [2023-02-15 20:42:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:42:41,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:41,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:41,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:42:41,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:42:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:42:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 20:42:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 20:42:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:42,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247916185] [2023-02-15 20:42:42,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874594151] [2023-02-15 20:42:42,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874594151] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:42:42,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:42:42,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-15 20:42:42,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671319121] [2023-02-15 20:42:42,658 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:42,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:42:42,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:42:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:42:42,660 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 20:42:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:43,309 INFO L93 Difference]: Finished difference Result 327 states and 404 transitions. [2023-02-15 20:42:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:42:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2023-02-15 20:42:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:43,312 INFO L225 Difference]: With dead ends: 327 [2023-02-15 20:42:43,312 INFO L226 Difference]: Without dead ends: 323 [2023-02-15 20:42:43,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:42:43,313 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:43,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 209 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 20:42:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-15 20:42:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2023-02-15 20:42:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 214 states have (on average 1.1822429906542056) internal successors, (253), 222 states have internal predecessors, (253), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-15 20:42:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 395 transitions. [2023-02-15 20:42:43,360 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 395 transitions. Word has length 74 [2023-02-15 20:42:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:43,360 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 395 transitions. [2023-02-15 20:42:43,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 20:42:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 395 transitions. [2023-02-15 20:42:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 20:42:43,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:43,361 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1] [2023-02-15 20:42:43,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:43,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2023-02-15 20:42:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304085201] [2023-02-15 20:42:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:43,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:43,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710916676] [2023-02-15 20:42:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:43,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:43,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:42:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 20:42:43,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-15 20:42:44,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-15 20:42:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304085201] [2023-02-15 20:42:44,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710916676] [2023-02-15 20:42:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710916676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:44,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:44,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 20:42:44,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899440344] [2023-02-15 20:42:44,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:42:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:42:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:42:44,752 INFO L87 Difference]: Start difference. First operand 320 states and 395 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-15 20:42:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:52,672 INFO L93 Difference]: Finished difference Result 454 states and 601 transitions. [2023-02-15 20:42:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:42:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2023-02-15 20:42:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:52,675 INFO L225 Difference]: With dead ends: 454 [2023-02-15 20:42:52,675 INFO L226 Difference]: Without dead ends: 443 [2023-02-15 20:42:52,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:42:52,677 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 154 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:52,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 595 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 20:42:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-15 20:42:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 410. [2023-02-15 20:42:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 272 states have (on average 1.2316176470588236) internal successors, (335), 281 states have internal predecessors, (335), 103 states have call successors, (103), 34 states have call predecessors, (103), 34 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2023-02-15 20:42:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2023-02-15 20:42:52,748 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 80 [2023-02-15 20:42:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:52,748 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2023-02-15 20:42:52,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-15 20:42:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2023-02-15 20:42:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 20:42:52,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:52,750 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:52,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:52,955 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,SelfDestructingSolverStorable14 [2023-02-15 20:42:52,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2023-02-15 20:42:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:52,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335310259] [2023-02-15 20:42:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:52,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:52,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408147473] [2023-02-15 20:42:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:42:52,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:52,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:52,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:52,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:42:53,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:42:53,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:42:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:42:53,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 20:42:53,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:42:53,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:53,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335310259] [2023-02-15 20:42:53,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:53,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408147473] [2023-02-15 20:42:53,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408147473] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:42:53,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:42:53,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:42:53,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685079161] [2023-02-15 20:42:53,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:53,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:42:53,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:53,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:42:53,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:42:53,061 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 20:42:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:53,212 INFO L93 Difference]: Finished difference Result 623 states and 882 transitions. [2023-02-15 20:42:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:42:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2023-02-15 20:42:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:53,215 INFO L225 Difference]: With dead ends: 623 [2023-02-15 20:42:53,216 INFO L226 Difference]: Without dead ends: 448 [2023-02-15 20:42:53,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:42:53,217 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:53,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:42:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-02-15 20:42:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 405. [2023-02-15 20:42:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 265 states have (on average 1.230188679245283) internal successors, (326), 271 states have internal predecessors, (326), 105 states have call successors, (105), 34 states have call predecessors, (105), 34 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2023-02-15 20:42:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 534 transitions. [2023-02-15 20:42:53,294 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 534 transitions. Word has length 96 [2023-02-15 20:42:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:53,295 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 534 transitions. [2023-02-15 20:42:53,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 20:42:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 534 transitions. [2023-02-15 20:42:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-15 20:42:53,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:53,296 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:53,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:53,501 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,SelfDestructingSolverStorable15 [2023-02-15 20:42:53,501 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2023-02-15 20:42:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:53,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250520735] [2023-02-15 20:42:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:53,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:53,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152735192] [2023-02-15 20:42:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:53,510 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:42:53,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:42:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 20:42:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-02-15 20:42:54,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-02-15 20:42:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250520735] [2023-02-15 20:42:55,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152735192] [2023-02-15 20:42:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152735192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:55,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:55,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-15 20:42:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239333801] [2023-02-15 20:42:55,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:55,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:42:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:42:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:42:55,487 INFO L87 Difference]: Start difference. First operand 405 states and 534 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 20:43:01,845 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:43:05,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:43:08,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:43:10,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:43:21,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:43:33,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:43:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:35,408 INFO L93 Difference]: Finished difference Result 494 states and 668 transitions. [2023-02-15 20:43:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:43:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 97 [2023-02-15 20:43:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:35,411 INFO L225 Difference]: With dead ends: 494 [2023-02-15 20:43:35,411 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 20:43:35,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:43:35,412 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 140 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 147 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:35,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 325 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1074 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2023-02-15 20:43:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 20:43:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 468. [2023-02-15 20:43:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 305 states have (on average 1.2524590163934426) internal successors, (382), 312 states have internal predecessors, (382), 127 states have call successors, (127), 35 states have call predecessors, (127), 35 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2023-02-15 20:43:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 634 transitions. [2023-02-15 20:43:35,551 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 634 transitions. Word has length 97 [2023-02-15 20:43:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:35,551 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 634 transitions. [2023-02-15 20:43:35,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 20:43:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 634 transitions. [2023-02-15 20:43:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-15 20:43:35,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:35,553 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:43:35,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-15 20:43:35,758 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,SelfDestructingSolverStorable16 [2023-02-15 20:43:35,759 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2023-02-15 20:43:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:35,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240529492] [2023-02-15 20:43:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:35,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:35,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:35,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055006400] [2023-02-15 20:43:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:35,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:35,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:35,783 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:43:35,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:43:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:43:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-15 20:43:35,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-15 20:43:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240529492] [2023-02-15 20:43:36,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055006400] [2023-02-15 20:43:36,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055006400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:36,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:36,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 20:43:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192997915] [2023-02-15 20:43:36,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:36,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:43:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:43:36,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:43:36,138 INFO L87 Difference]: Start difference. First operand 468 states and 634 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-15 20:43:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:37,046 INFO L93 Difference]: Finished difference Result 1595 states and 2213 transitions. [2023-02-15 20:43:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:43:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2023-02-15 20:43:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:37,053 INFO L225 Difference]: With dead ends: 1595 [2023-02-15 20:43:37,053 INFO L226 Difference]: Without dead ends: 1391 [2023-02-15 20:43:37,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:43:37,055 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 194 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:37,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 482 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:43:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2023-02-15 20:43:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1335. [2023-02-15 20:43:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 837 states have (on average 1.1971326164874552) internal successors, (1002), 856 states have internal predecessors, (1002), 382 states have call successors, (382), 115 states have call predecessors, (382), 115 states have return successors, (373), 363 states have call predecessors, (373), 373 states have call successors, (373) [2023-02-15 20:43:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1757 transitions. [2023-02-15 20:43:37,626 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1757 transitions. Word has length 112 [2023-02-15 20:43:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1757 transitions. [2023-02-15 20:43:37,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-15 20:43:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1757 transitions. [2023-02-15 20:43:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-15 20:43:37,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:37,630 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:43:37,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 20:43:37,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 20:43:37,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:37,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 2 times [2023-02-15 20:43:37,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:37,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806736225] [2023-02-15 20:43:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:37,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:37,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312174632] [2023-02-15 20:43:37,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:43:37,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:37,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:37,855 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:43:37,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:43:37,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:43:37,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:43:37,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 20:43:37,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-15 20:43:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-15 20:43:39,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806736225] [2023-02-15 20:43:39,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312174632] [2023-02-15 20:43:39,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312174632] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:39,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:39,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 20:43:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079969907] [2023-02-15 20:43:39,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:43:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:43:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:43:39,194 INFO L87 Difference]: Start difference. First operand 1335 states and 1757 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 18 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-15 20:44:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:04,236 INFO L93 Difference]: Finished difference Result 1903 states and 2570 transitions. [2023-02-15 20:44:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 20:44:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 18 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2023-02-15 20:44:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:04,244 INFO L225 Difference]: With dead ends: 1903 [2023-02-15 20:44:04,244 INFO L226 Difference]: Without dead ends: 1901 [2023-02-15 20:44:04,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=645, Invalid=2547, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 20:44:04,246 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 166 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:04,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 763 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2023-02-15 20:44:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2023-02-15 20:44:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1788. [2023-02-15 20:44:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1107 states have (on average 1.2113821138211383) internal successors, (1341), 1126 states have internal predecessors, (1341), 538 states have call successors, (538), 142 states have call predecessors, (538), 142 states have return successors, (529), 519 states have call predecessors, (529), 529 states have call successors, (529) [2023-02-15 20:44:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2408 transitions. [2023-02-15 20:44:05,000 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2408 transitions. Word has length 115 [2023-02-15 20:44:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:05,001 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2408 transitions. [2023-02-15 20:44:05,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 18 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-15 20:44:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2408 transitions. [2023-02-15 20:44:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 20:44:05,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:05,003 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:05,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:05,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:05,209 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 3 times [2023-02-15 20:44:05,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:05,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168138225] [2023-02-15 20:44:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:05,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:05,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529953442] [2023-02-15 20:44:05,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:44:05,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:05,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:05,225 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 20:44:05,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:44:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:44:05,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 20:44:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-15 20:44:05,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-15 20:44:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168138225] [2023-02-15 20:44:06,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529953442] [2023-02-15 20:44:06,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529953442] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:06,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:06,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-02-15 20:44:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192396440] [2023-02-15 20:44:06,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:06,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:44:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:44:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:44:06,841 INFO L87 Difference]: Start difference. First operand 1788 states and 2408 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-02-15 20:44:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:20,834 INFO L93 Difference]: Finished difference Result 2462 states and 3344 transitions. [2023-02-15 20:44:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 20:44:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 119 [2023-02-15 20:44:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:20,847 INFO L225 Difference]: With dead ends: 2462 [2023-02-15 20:44:20,847 INFO L226 Difference]: Without dead ends: 2458 [2023-02-15 20:44:20,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 20:44:20,851 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 169 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:20,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 821 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-02-15 20:44:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2023-02-15 20:44:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2306. [2023-02-15 20:44:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1447 states have (on average 1.219765031098825) internal successors, (1765), 1468 states have internal predecessors, (1765), 678 states have call successors, (678), 181 states have call predecessors, (678), 180 states have return successors, (669), 656 states have call predecessors, (669), 669 states have call successors, (669) [2023-02-15 20:44:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3112 transitions. [2023-02-15 20:44:22,142 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3112 transitions. Word has length 119 [2023-02-15 20:44:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:22,143 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3112 transitions. [2023-02-15 20:44:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-02-15 20:44:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3112 transitions. [2023-02-15 20:44:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-15 20:44:22,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:22,145 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:22,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:22,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:22,356 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2023-02-15 20:44:22,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:22,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104405338] [2023-02-15 20:44:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:22,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:22,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378395547] [2023-02-15 20:44:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:22,366 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:22,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 20:44:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:44:22,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-15 20:44:22,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-15 20:44:22,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:22,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104405338] [2023-02-15 20:44:22,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:22,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378395547] [2023-02-15 20:44:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378395547] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:22,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:22,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 20:44:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177612998] [2023-02-15 20:44:22,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:44:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:44:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:44:22,750 INFO L87 Difference]: Start difference. First operand 2306 states and 3112 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 20:44:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:24,071 INFO L93 Difference]: Finished difference Result 2387 states and 3194 transitions. [2023-02-15 20:44:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:44:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2023-02-15 20:44:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:24,081 INFO L225 Difference]: With dead ends: 2387 [2023-02-15 20:44:24,082 INFO L226 Difference]: Without dead ends: 2347 [2023-02-15 20:44:24,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:44:24,084 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 202 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:24,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 344 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:44:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2023-02-15 20:44:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2333. [2023-02-15 20:44:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1474 states have (on average 1.1845318860244234) internal successors, (1746), 1495 states have internal predecessors, (1746), 678 states have call successors, (678), 181 states have call predecessors, (678), 180 states have return successors, (669), 656 states have call predecessors, (669), 669 states have call successors, (669) [2023-02-15 20:44:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3093 transitions. [2023-02-15 20:44:25,316 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3093 transitions. Word has length 129 [2023-02-15 20:44:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:25,316 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3093 transitions. [2023-02-15 20:44:25,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 20:44:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3093 transitions. [2023-02-15 20:44:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 20:44:25,318 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:25,319 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:25,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:25,524 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2023-02-15 20:44:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:25,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946939710] [2023-02-15 20:44:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:25,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:25,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942009491] [2023-02-15 20:44:25,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:44:25,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:25,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:25,534 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:25,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 20:44:25,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:44:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:44:25,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 20:44:25,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-15 20:44:27,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 70 proven. 59 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-02-15 20:44:28,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946939710] [2023-02-15 20:44:28,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942009491] [2023-02-15 20:44:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942009491] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:28,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:28,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2023-02-15 20:44:28,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251516765] [2023-02-15 20:44:28,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:28,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:44:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:44:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:44:28,880 INFO L87 Difference]: Start difference. First operand 2333 states and 3093 transitions. Second operand has 32 states, 30 states have (on average 2.3) internal successors, (69), 28 states have internal predecessors, (69), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 14 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-15 20:44:44,246 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 77 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:45:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:45:20,055 INFO L93 Difference]: Finished difference Result 2819 states and 3801 transitions. [2023-02-15 20:45:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 20:45:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3) internal successors, (69), 28 states have internal predecessors, (69), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 14 states have call predecessors, (39), 13 states have call successors, (39) Word has length 130 [2023-02-15 20:45:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:45:20,067 INFO L225 Difference]: With dead ends: 2819 [2023-02-15 20:45:20,067 INFO L226 Difference]: Without dead ends: 2778 [2023-02-15 20:45:20,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 20:45:20,070 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 220 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:45:20,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 627 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2023-02-15 20:45:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2023-02-15 20:45:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2681. [2023-02-15 20:45:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 1678 states have (on average 1.1811680572109655) internal successors, (1982), 1699 states have internal predecessors, (1982), 808 states have call successors, (808), 194 states have call predecessors, (808), 194 states have return successors, (801), 787 states have call predecessors, (801), 801 states have call successors, (801) [2023-02-15 20:45:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3591 transitions. [2023-02-15 20:45:21,493 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3591 transitions. Word has length 130 [2023-02-15 20:45:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:45:21,493 INFO L495 AbstractCegarLoop]: Abstraction has 2681 states and 3591 transitions. [2023-02-15 20:45:21,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3) internal successors, (69), 28 states have internal predecessors, (69), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 14 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-15 20:45:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3591 transitions. [2023-02-15 20:45:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-15 20:45:21,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:45:21,496 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:45:21,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 20:45:21,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:21,702 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:45:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:45:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1962327715, now seen corresponding path program 4 times [2023-02-15 20:45:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:45:21,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962021982] [2023-02-15 20:45:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:45:21,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:45:21,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:45:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211551079] [2023-02-15 20:45:21,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:45:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:45:21,721 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:45:21,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 20:45:21,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:45:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:45:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 20:45:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:45:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 129 proven. 96 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2023-02-15 20:45:23,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:45:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 129 proven. 87 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2023-02-15 20:45:44,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:45:44,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962021982] [2023-02-15 20:45:44,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:45:44,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211551079] [2023-02-15 20:45:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211551079] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:45:44,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:45:44,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-15 20:45:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593245057] [2023-02-15 20:45:44,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:45:44,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:45:44,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:45:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:45:44,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=798, Unknown=1, NotChecked=0, Total=992 [2023-02-15 20:45:44,850 INFO L87 Difference]: Start difference. First operand 2681 states and 3591 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 16 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2023-02-15 20:45:48,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:45:49,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:46:45,416 WARN L233 SmtUtils]: Spent 50.94s on a formula simplification. DAG size of input: 151 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:46:57,227 WARN L233 SmtUtils]: Spent 11.28s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:46:59,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []