./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/egcd3-ll_valuebound100.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 c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:55:06,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:55:06,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:55:06,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:55:06,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:55:06,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:55:06,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:55:06,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:55:06,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:55:06,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:55:06,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:55:06,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:55:06,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:55:06,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:55:06,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:55:06,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:55:06,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:55:06,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:55:06,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:55:06,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:55:06,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:55:06,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:55:06,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:55:06,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:55:06,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:55:06,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:55:06,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:55:06,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:55:06,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:55:06,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:55:06,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:55:06,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:55:06,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:55:06,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:55:06,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:55:06,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:55:06,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:55:06,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:55:06,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:55:06,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:55:06,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:55:06,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:55:06,703 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:55:06,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:55:06,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:55:06,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:55:06,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:55:06,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:55:06,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:55:06,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:55:06,705 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:55:06,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:55:06,706 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:55:06,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:55:06,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:55:06,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:55:06,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:55:06,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:55:06,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:55:06,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:55:06,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:55:06,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:55:06,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:55:06,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:55:06,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:55:06,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:55:06,709 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:55:06,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:55:06,709 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:55:06,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:55:06,709 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:55:06,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2023-02-14 23:55:06,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:55:06,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:55:06,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:55:06,916 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:55:06,917 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:55:06,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-02-14 23:55:07,841 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:55:07,981 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:55:07,982 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-02-14 23:55:07,985 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bf72f7a/c1319a07a6c6419fb6e125c8969fdb02/FLAG81a70525d [2023-02-14 23:55:07,993 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bf72f7a/c1319a07a6c6419fb6e125c8969fdb02 [2023-02-14 23:55:07,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:55:07,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:55:07,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:55:07,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:55:08,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:55:08,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:55:07" (1/1) ... [2023-02-14 23:55:08,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25995a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08, skipping insertion in model container [2023-02-14 23:55:08,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:55:07" (1/1) ... [2023-02-14 23:55:08,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:55:08,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:55:08,102 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/egcd3-ll_valuebound100.c[490,503] [2023-02-14 23:55:08,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:55:08,136 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:55:08,144 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/egcd3-ll_valuebound100.c[490,503] [2023-02-14 23:55:08,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:55:08,163 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:55:08,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08 WrapperNode [2023-02-14 23:55:08,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:55:08,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:55:08,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:55:08,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:55:08,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,183 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-14 23:55:08,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:55:08,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:55:08,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:55:08,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:55:08,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,199 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:55:08,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:55:08,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:55:08,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:55:08,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (1/1) ... [2023-02-14 23:55:08,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:55:08,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:08,223 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) [2023-02-14 23:55:08,235 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 [2023-02-14 23:55:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:55:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 23:55:08,245 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 23:55:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:55:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:55:08,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:55:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 23:55:08,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 23:55:08,298 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:55:08,300 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:55:08,463 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:55:08,467 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:55:08,467 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 23:55:08,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:55:08 BoogieIcfgContainer [2023-02-14 23:55:08,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:55:08,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:55:08,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:55:08,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:55:08,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:55:07" (1/3) ... [2023-02-14 23:55:08,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624eb73a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:55:08, skipping insertion in model container [2023-02-14 23:55:08,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:55:08" (2/3) ... [2023-02-14 23:55:08,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624eb73a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:55:08, skipping insertion in model container [2023-02-14 23:55:08,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:55:08" (3/3) ... [2023-02-14 23:55:08,473 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2023-02-14 23:55:08,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:55:08,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:55:08,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:55:08,545 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;@3c1c64dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:55:08,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:55:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 23:55:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 23:55:08,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:08,558 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] [2023-02-14 23:55:08,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-14 23:55:08,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:08,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505170070] [2023-02-14 23:55:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:08,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:08,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505170070] [2023-02-14 23:55:08,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 23:55:08,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666045456] [2023-02-14 23:55:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:08,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:08,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:08,677 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) [2023-02-14 23:55:08,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:55:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 23:55:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 23:55:08,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:55:08,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666045456] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:55:08,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:55:08,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 23:55:08,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292704497] [2023-02-14 23:55:08,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 23:55:08,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 23:55:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:55:08,780 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-02-14 23:55:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:08,811 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-14 23:55:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 23:55:08,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 29 [2023-02-14 23:55:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:08,818 INFO L225 Difference]: With dead ends: 67 [2023-02-14 23:55:08,818 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 23:55:08,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:55:08,823 INFO L413 NwaCegarLoop]: 44 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, 44 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 [2023-02-14 23:55:08,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:55:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 23:55:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-14 23:55:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 23:55:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-14 23:55:08,860 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-14 23:55:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:08,860 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-14 23:55:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-02-14 23:55:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-14 23:55:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 23:55:08,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:08,862 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] [2023-02-14 23:55:08,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:09,066 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 [2023-02-14 23:55:09,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-14 23:55:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:09,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26419724] [2023-02-14 23:55:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:09,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:09,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722863817] [2023-02-14 23:55:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:09,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:09,084 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) [2023-02-14 23:55:09,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:55:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:09,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 23:55:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:55:09,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:55:09,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:09,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26419724] [2023-02-14 23:55:09,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:09,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722863817] [2023-02-14 23:55:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722863817] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:55:09,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:55:09,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 23:55:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44259407] [2023-02-14 23:55:09,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 23:55:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 23:55:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 23:55:09,206 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 23:55:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:09,286 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-14 23:55:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:55:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-14 23:55:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:09,287 INFO L225 Difference]: With dead ends: 50 [2023-02-14 23:55:09,288 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 23:55:09,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:55:09,289 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:09,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:55:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 23:55:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-14 23:55:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 23:55:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-14 23:55:09,296 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-14 23:55:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:09,297 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-14 23:55:09,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 23:55:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-14 23:55:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 23:55:09,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:09,298 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, 1] [2023-02-14 23:55:09,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:09,505 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 [2023-02-14 23:55:09,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-14 23:55:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:09,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661373628] [2023-02-14 23:55:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:09,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:09,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:09,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812474375] [2023-02-14 23:55:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:09,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:09,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:09,519 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) [2023-02-14 23:55:09,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:55:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:09,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:55:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:55:09,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:55:09,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661373628] [2023-02-14 23:55:09,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812474375] [2023-02-14 23:55:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812474375] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:55:09,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:55:09,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 23:55:09,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971573088] [2023-02-14 23:55:09,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:09,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 23:55:09,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 23:55:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:55:09,678 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 23:55:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:09,783 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-14 23:55:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 23:55:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-02-14 23:55:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:09,784 INFO L225 Difference]: With dead ends: 49 [2023-02-14 23:55:09,784 INFO L226 Difference]: Without dead ends: 47 [2023-02-14 23:55:09,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:55:09,785 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:09,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:55:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-14 23:55:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-14 23:55:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 23:55:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-14 23:55:09,792 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-14 23:55:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:09,793 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-14 23:55:09,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 23:55:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-14 23:55:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 23:55:09,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:09,794 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] [2023-02-14 23:55:09,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:10,005 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 [2023-02-14 23:55:10,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-14 23:55:10,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:10,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174717271] [2023-02-14 23:55:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:10,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:10,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242242692] [2023-02-14 23:55:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:10,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:10,017 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) [2023-02-14 23:55:10,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:55:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 23:55:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:55:10,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:55:10,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174717271] [2023-02-14 23:55:10,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242242692] [2023-02-14 23:55:10,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242242692] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:55:10,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:55:10,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 23:55:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382593240] [2023-02-14 23:55:10,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:10,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 23:55:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 23:55:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:55:10,198 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 23:55:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:10,368 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-14 23:55:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 23:55:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-14 23:55:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:10,374 INFO L225 Difference]: With dead ends: 99 [2023-02-14 23:55:10,374 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 23:55:10,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:55:10,379 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:10,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:55:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 23:55:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-14 23:55:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-14 23:55:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-14 23:55:10,395 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-14 23:55:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:10,395 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-14 23:55:10,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 23:55:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-14 23:55:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 23:55:10,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:10,396 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, 1] [2023-02-14 23:55:10,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:10,602 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 [2023-02-14 23:55:10,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-14 23:55:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:10,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198997428] [2023-02-14 23:55:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:10,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:10,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:10,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414034104] [2023-02-14 23:55:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:10,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:10,628 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) [2023-02-14 23:55:10,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:55:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:10,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:55:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 23:55:10,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198997428] [2023-02-14 23:55:10,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414034104] [2023-02-14 23:55:10,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414034104] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:55:10,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:55:10,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-14 23:55:10,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111182873] [2023-02-14 23:55:10,792 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:10,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 23:55:10,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 23:55:10,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:55:10,793 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 23:55:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:10,873 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-14 23:55:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 23:55:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-14 23:55:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:10,875 INFO L225 Difference]: With dead ends: 75 [2023-02-14 23:55:10,875 INFO L226 Difference]: Without dead ends: 73 [2023-02-14 23:55:10,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-14 23:55:10,876 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:10,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:55:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-14 23:55:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-14 23:55:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-14 23:55:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-14 23:55:10,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-14 23:55:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:10,884 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-14 23:55:10,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 23:55:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-14 23:55:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 23:55:10,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:10,885 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 23:55:10,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:11,089 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 [2023-02-14 23:55:11,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-14 23:55:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101952677] [2023-02-14 23:55:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:11,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544998531] [2023-02-14 23:55:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:11,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:11,111 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) [2023-02-14 23:55:11,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:55:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:11,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 23:55:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 23:55:11,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 23:55:11,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101952677] [2023-02-14 23:55:11,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:11,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544998531] [2023-02-14 23:55:11,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544998531] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:55:11,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:55:11,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-14 23:55:11,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391932492] [2023-02-14 23:55:11,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:11,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 23:55:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:11,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 23:55:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:55:11,405 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 23:55:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:11,551 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2023-02-14 23:55:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 23:55:11,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2023-02-14 23:55:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:11,553 INFO L225 Difference]: With dead ends: 107 [2023-02-14 23:55:11,553 INFO L226 Difference]: Without dead ends: 105 [2023-02-14 23:55:11,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-02-14 23:55:11,553 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:11,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 259 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:55:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-14 23:55:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2023-02-14 23:55:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-14 23:55:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-14 23:55:11,565 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-14 23:55:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:11,565 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-14 23:55:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 23:55:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-14 23:55:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:55:11,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:11,566 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, 1] [2023-02-14 23:55:11,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:11,772 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 [2023-02-14 23:55:11,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-14 23:55:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:11,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716931781] [2023-02-14 23:55:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:11,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:11,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803509338] [2023-02-14 23:55:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:11,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:11,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:11,783 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) [2023-02-14 23:55:11,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:55:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 23:55:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 23:55:11,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 23:55:13,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716931781] [2023-02-14 23:55:13,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803509338] [2023-02-14 23:55:13,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803509338] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:55:13,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:55:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-02-14 23:55:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637429756] [2023-02-14 23:55:13,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:13,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:55:13,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:55:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:55:13,158 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-02-14 23:55:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:13,206 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2023-02-14 23:55:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:55:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 43 [2023-02-14 23:55:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:13,207 INFO L225 Difference]: With dead ends: 147 [2023-02-14 23:55:13,207 INFO L226 Difference]: Without dead ends: 145 [2023-02-14 23:55:13,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-14 23:55:13,208 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:13,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:55:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-14 23:55:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2023-02-14 23:55:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-14 23:55:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2023-02-14 23:55:13,225 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2023-02-14 23:55:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:13,225 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2023-02-14 23:55:13,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-02-14 23:55:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2023-02-14 23:55:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:55:13,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:13,226 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:55:13,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:13,432 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 [2023-02-14 23:55:13,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-14 23:55:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:13,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110515380] [2023-02-14 23:55:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:13,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:13,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101967449] [2023-02-14 23:55:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:13,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:13,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:13,455 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) [2023-02-14 23:55:13,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 23:55:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:13,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 23:55:13,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 23:55:13,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 23:55:14,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:14,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110515380] [2023-02-14 23:55:14,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:14,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101967449] [2023-02-14 23:55:14,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101967449] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:55:14,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:55:14,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-02-14 23:55:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879551393] [2023-02-14 23:55:14,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:14,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 23:55:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 23:55:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-14 23:55:14,006 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 23:55:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:18,234 INFO L93 Difference]: Finished difference Result 198 states and 280 transitions. [2023-02-14 23:55:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 23:55:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-02-14 23:55:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:18,237 INFO L225 Difference]: With dead ends: 198 [2023-02-14 23:55:18,237 INFO L226 Difference]: Without dead ends: 196 [2023-02-14 23:55:18,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 23:55:18,238 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:18,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 203 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-02-14 23:55:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-14 23:55:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2023-02-14 23:55:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 115 states have internal predecessors, (140), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-14 23:55:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2023-02-14 23:55:18,274 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 43 [2023-02-14 23:55:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:18,274 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2023-02-14 23:55:18,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 23:55:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2023-02-14 23:55:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:55:18,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:18,276 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:55:18,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:18,480 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 [2023-02-14 23:55:18,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2023-02-14 23:55:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:18,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193773668] [2023-02-14 23:55:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:18,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:18,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:18,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446679703] [2023-02-14 23:55:18,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:55:18,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:18,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:18,496 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) [2023-02-14 23:55:18,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 23:55:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:55:18,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:55:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 23:55:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 23:55:18,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:55:18,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:18,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193773668] [2023-02-14 23:55:18,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:18,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446679703] [2023-02-14 23:55:18,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446679703] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:55:18,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:55:18,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 23:55:18,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914964202] [2023-02-14 23:55:18,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:18,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:55:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:55:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:55:18,551 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-02-14 23:55:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:18,655 INFO L93 Difference]: Finished difference Result 217 states and 301 transitions. [2023-02-14 23:55:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:55:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 43 [2023-02-14 23:55:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:18,657 INFO L225 Difference]: With dead ends: 217 [2023-02-14 23:55:18,657 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 23:55:18,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:55:18,661 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:18,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:55:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 23:55:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2023-02-14 23:55:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 33 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-14 23:55:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2023-02-14 23:55:18,686 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 43 [2023-02-14 23:55:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:18,686 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2023-02-14 23:55:18,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-02-14 23:55:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2023-02-14 23:55:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 23:55:18,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:18,690 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, 1] [2023-02-14 23:55:18,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:18,894 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 [2023-02-14 23:55:18,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-14 23:55:18,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:18,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80215624] [2023-02-14 23:55:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:18,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:18,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200426457] [2023-02-14 23:55:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:18,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:18,919 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) [2023-02-14 23:55:18,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 23:55:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:18,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 23:55:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 23:55:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:55:19,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80215624] [2023-02-14 23:55:19,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200426457] [2023-02-14 23:55:19,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200426457] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:55:19,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:55:19,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-14 23:55:19,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888920197] [2023-02-14 23:55:19,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:55:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:55:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:55:19,124 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 23:55:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:19,175 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2023-02-14 23:55:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:55:19,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-02-14 23:55:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:19,176 INFO L225 Difference]: With dead ends: 119 [2023-02-14 23:55:19,176 INFO L226 Difference]: Without dead ends: 117 [2023-02-14 23:55:19,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:55:19,177 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:19,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:55:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-14 23:55:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-02-14 23:55:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 77 states have internal predecessors, (87), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-14 23:55:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2023-02-14 23:55:19,201 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 48 [2023-02-14 23:55:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:19,202 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2023-02-14 23:55:19,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 23:55:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2023-02-14 23:55:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 23:55:19,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:19,204 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, 1, 1, 1] [2023-02-14 23:55:19,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:19,408 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 [2023-02-14 23:55:19,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-14 23:55:19,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:19,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937962699] [2023-02-14 23:55:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:19,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:19,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293113450] [2023-02-14 23:55:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:19,429 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) [2023-02-14 23:55:19,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 23:55:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 23:55:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 23:55:19,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:55:21,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937962699] [2023-02-14 23:55:21,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293113450] [2023-02-14 23:55:21,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293113450] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:55:21,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:55:21,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-02-14 23:55:21,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481277741] [2023-02-14 23:55:21,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:21,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 23:55:21,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 23:55:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-02-14 23:55:21,078 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 23:55:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:32,669 INFO L93 Difference]: Finished difference Result 336 states and 470 transitions. [2023-02-14 23:55:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 23:55:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 60 [2023-02-14 23:55:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:32,670 INFO L225 Difference]: With dead ends: 336 [2023-02-14 23:55:32,670 INFO L226 Difference]: Without dead ends: 248 [2023-02-14 23:55:32,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 23:55:32,672 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:32,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 244 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-02-14 23:55:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-14 23:55:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2023-02-14 23:55:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 128 states have internal predecessors, (150), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-14 23:55:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 259 transitions. [2023-02-14 23:55:32,728 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 259 transitions. Word has length 60 [2023-02-14 23:55:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:32,728 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 259 transitions. [2023-02-14 23:55:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 23:55:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 259 transitions. [2023-02-14 23:55:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 23:55:32,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:32,729 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:55:32,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 23:55:32,933 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 [2023-02-14 23:55:32,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2023-02-14 23:55:32,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:32,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060597053] [2023-02-14 23:55:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:32,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:32,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372921311] [2023-02-14 23:55:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:32,954 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) [2023-02-14 23:55:32,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:55:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:32,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 23:55:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 23:55:33,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-14 23:55:33,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060597053] [2023-02-14 23:55:33,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372921311] [2023-02-14 23:55:33,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372921311] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:55:33,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:55:33,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-14 23:55:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771489016] [2023-02-14 23:55:33,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:33,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 23:55:33,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 23:55:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-14 23:55:33,867 INFO L87 Difference]: Start difference. First operand 195 states and 259 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-14 23:55:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:57,607 INFO L93 Difference]: Finished difference Result 322 states and 453 transitions. [2023-02-14 23:55:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 23:55:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2023-02-14 23:55:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:57,610 INFO L225 Difference]: With dead ends: 322 [2023-02-14 23:55:57,610 INFO L226 Difference]: Without dead ends: 320 [2023-02-14 23:55:57,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 23:55:57,611 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 144 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:57,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 376 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-02-14 23:55:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-14 23:55:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 203. [2023-02-14 23:55:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-14 23:55:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2023-02-14 23:55:57,671 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 68 [2023-02-14 23:55:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:57,671 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2023-02-14 23:55:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-14 23:55:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2023-02-14 23:55:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 23:55:57,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:57,672 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1, 1] [2023-02-14 23:55:57,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 23:55:57,876 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 [2023-02-14 23:55:57,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2023-02-14 23:55:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:57,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369747782] [2023-02-14 23:55:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:57,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811197344] [2023-02-14 23:55:57,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:55:57,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:57,894 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) [2023-02-14 23:55:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:55:57,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:55:57,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:55:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 23:55:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 23:55:57,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:55:57,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369747782] [2023-02-14 23:55:57,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811197344] [2023-02-14 23:55:57,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811197344] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:55:57,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:55:57,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 23:55:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814707674] [2023-02-14 23:55:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:55:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:55:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:55:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:55:57,958 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 23:55:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:58,062 INFO L93 Difference]: Finished difference Result 363 states and 487 transitions. [2023-02-14 23:55:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:55:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2023-02-14 23:55:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:58,064 INFO L225 Difference]: With dead ends: 363 [2023-02-14 23:55:58,064 INFO L226 Difference]: Without dead ends: 241 [2023-02-14 23:55:58,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 23:55:58,065 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:58,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:55:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-14 23:55:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2023-02-14 23:55:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 142 states have internal predecessors, (165), 71 states have call successors, (71), 15 states have call predecessors, (71), 15 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2023-02-14 23:55:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 306 transitions. [2023-02-14 23:55:58,128 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 306 transitions. Word has length 73 [2023-02-14 23:55:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:58,128 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 306 transitions. [2023-02-14 23:55:58,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 23:55:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 306 transitions. [2023-02-14 23:55:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 23:55:58,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:58,129 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1] [2023-02-14 23:55:58,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:58,333 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 [2023-02-14 23:55:58,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2023-02-14 23:55:58,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:58,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234479852] [2023-02-14 23:55:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:58,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:58,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:58,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094912325] [2023-02-14 23:55:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:55:58,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:58,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:58,340 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) [2023-02-14 23:55:58,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 23:55:58,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:55:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:55:58,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-14 23:55:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-14 23:55:58,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234479852] [2023-02-14 23:55:58,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094912325] [2023-02-14 23:55:58,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094912325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:55:58,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:55:58,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-14 23:55:58,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861367543] [2023-02-14 23:55:58,935 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:58,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 23:55:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 23:55:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-02-14 23:55:58,936 INFO L87 Difference]: Start difference. First operand 227 states and 306 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-14 23:55:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:59,589 INFO L93 Difference]: Finished difference Result 321 states and 435 transitions. [2023-02-14 23:55:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 23:55:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2023-02-14 23:55:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:59,591 INFO L225 Difference]: With dead ends: 321 [2023-02-14 23:55:59,591 INFO L226 Difference]: Without dead ends: 319 [2023-02-14 23:55:59,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-02-14 23:55:59,592 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:59,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 303 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:55:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-14 23:55:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 306. [2023-02-14 23:55:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 184 states have (on average 1.190217391304348) internal successors, (219), 185 states have internal predecessors, (219), 101 states have call successors, (101), 20 states have call predecessors, (101), 20 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-02-14 23:55:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 420 transitions. [2023-02-14 23:55:59,694 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 420 transitions. Word has length 73 [2023-02-14 23:55:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:59,694 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 420 transitions. [2023-02-14 23:55:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-14 23:55:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 420 transitions. [2023-02-14 23:55:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 23:55:59,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:59,695 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:55:59,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:59,899 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 [2023-02-14 23:55:59,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-14 23:55:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:59,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543258477] [2023-02-14 23:55:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:59,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:59,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:59,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412789263] [2023-02-14 23:55:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:59,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:59,911 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) [2023-02-14 23:55:59,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 23:55:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:55:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 23:55:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:56:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-14 23:56:00,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:56:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-14 23:56:02,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:56:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543258477] [2023-02-14 23:56:02,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:56:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412789263] [2023-02-14 23:56:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412789263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:56:02,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:56:02,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-02-14 23:56:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466569620] [2023-02-14 23:56:02,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:56:02,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 23:56:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:56:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 23:56:02,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-02-14 23:56:02,137 INFO L87 Difference]: Start difference. First operand 306 states and 420 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-14 23:56:04,669 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 [] [2023-02-14 23:56:18,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:56:50,847 INFO L93 Difference]: Finished difference Result 467 states and 649 transitions. [2023-02-14 23:56:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-14 23:56:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2023-02-14 23:56:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:56:50,859 INFO L225 Difference]: With dead ends: 467 [2023-02-14 23:56:50,859 INFO L226 Difference]: Without dead ends: 463 [2023-02-14 23:56:50,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=1433, Invalid=7309, Unknown=0, NotChecked=0, Total=8742 [2023-02-14 23:56:50,861 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 286 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 538 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:56:50,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 666 Invalid, 2734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2195 Invalid, 1 Unknown, 0 Unchecked, 14.7s Time] [2023-02-14 23:56:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-02-14 23:56:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 418. [2023-02-14 23:56:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 243 states have (on average 1.213991769547325) internal successors, (295), 244 states have internal predecessors, (295), 149 states have call successors, (149), 25 states have call predecessors, (149), 25 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2023-02-14 23:56:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 592 transitions. [2023-02-14 23:56:51,077 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 592 transitions. Word has length 87 [2023-02-14 23:56:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:56:51,077 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 592 transitions. [2023-02-14 23:56:51,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-14 23:56:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 592 transitions. [2023-02-14 23:56:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-14 23:56:51,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:56:51,079 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:56:51,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 23:56:51,283 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 [2023-02-14 23:56:51,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:56:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:56:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2023-02-14 23:56:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:56:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946770786] [2023-02-14 23:56:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:56:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:56:51,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:56:51,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038428377] [2023-02-14 23:56:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:56:51,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:56:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:56:51,291 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) [2023-02-14 23:56:51,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 23:56:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:56:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 23:56:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:56:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-02-14 23:56:51,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:56:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-02-14 23:56:52,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:56:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946770786] [2023-02-14 23:56:52,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:56:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038428377] [2023-02-14 23:56:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038428377] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:56:52,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:56:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 23:56:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376948494] [2023-02-14 23:56:52,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:56:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:56:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:56:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:56:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:56:52,025 INFO L87 Difference]: Start difference. First operand 418 states and 592 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 23:56:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:56:54,139 INFO L93 Difference]: Finished difference Result 920 states and 1426 transitions. [2023-02-14 23:56:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:56:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2023-02-14 23:56:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:56:54,143 INFO L225 Difference]: With dead ends: 920 [2023-02-14 23:56:54,143 INFO L226 Difference]: Without dead ends: 918 [2023-02-14 23:56:54,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 23:56:54,145 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 137 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:56:54,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 510 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 23:56:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-02-14 23:56:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 844. [2023-02-14 23:56:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 414 states have (on average 1.3067632850241546) internal successors, (541), 415 states have internal predecessors, (541), 401 states have call successors, (401), 28 states have call predecessors, (401), 28 states have return successors, (400), 400 states have call predecessors, (400), 400 states have call successors, (400) [2023-02-14 23:56:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1342 transitions. [2023-02-14 23:56:54,733 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1342 transitions. Word has length 90 [2023-02-14 23:56:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:56:54,733 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1342 transitions. [2023-02-14 23:56:54,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 23:56:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1342 transitions. [2023-02-14 23:56:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-14 23:56:54,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:56:54,734 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:56:54,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 23:56:54,938 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 [2023-02-14 23:56:54,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:56:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:56:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1599365144, now seen corresponding path program 1 times [2023-02-14 23:56:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:56:54,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044943316] [2023-02-14 23:56:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:56:54,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:56:54,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:56:54,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598672571] [2023-02-14 23:56:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:56:54,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:56:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:56:54,957 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) [2023-02-14 23:56:54,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 23:56:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:56:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 23:56:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:56:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-02-14 23:56:55,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:56:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-02-14 23:56:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:56:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044943316] [2023-02-14 23:56:56,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:56:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598672571] [2023-02-14 23:56:56,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598672571] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:56:56,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:56:56,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-14 23:56:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074018128] [2023-02-14 23:56:56,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:56:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 23:56:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:56:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 23:56:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-14 23:56:56,769 INFO L87 Difference]: Start difference. First operand 844 states and 1342 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 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) [2023-02-14 23:57:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:39,235 INFO L93 Difference]: Finished difference Result 1210 states and 1932 transitions. [2023-02-14 23:57:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 23:57:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 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 90 [2023-02-14 23:57:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:39,239 INFO L225 Difference]: With dead ends: 1210 [2023-02-14 23:57:39,239 INFO L226 Difference]: Without dead ends: 1208 [2023-02-14 23:57:39,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=815, Invalid=3217, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 23:57:39,241 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 192 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:39,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 470 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2023-02-14 23:57:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2023-02-14 23:57:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1077. [2023-02-14 23:57:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 527 states have (on average 1.3149905123339658) internal successors, (693), 528 states have internal predecessors, (693), 517 states have call successors, (517), 32 states have call predecessors, (517), 32 states have return successors, (516), 516 states have call predecessors, (516), 516 states have call successors, (516) [2023-02-14 23:57:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1726 transitions. [2023-02-14 23:57:40,104 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1726 transitions. Word has length 90 [2023-02-14 23:57:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:40,104 INFO L495 AbstractCegarLoop]: Abstraction has 1077 states and 1726 transitions. [2023-02-14 23:57:40,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 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) [2023-02-14 23:57:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1726 transitions. [2023-02-14 23:57:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-02-14 23:57:40,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:40,107 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:40,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:40,312 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 [2023-02-14 23:57:40,313 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -577787487, now seen corresponding path program 4 times [2023-02-14 23:57:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:40,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400958998] [2023-02-14 23:57:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:40,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:40,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054503978] [2023-02-14 23:57:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:57:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:40,335 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) [2023-02-14 23:57:40,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 23:57:40,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:57:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 23:57:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 38 proven. 53 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-14 23:57:41,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-14 23:57:44,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400958998] [2023-02-14 23:57:44,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054503978] [2023-02-14 23:57:44,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054503978] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:44,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:44,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-02-14 23:57:44,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607519062] [2023-02-14 23:57:44,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:44,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 23:57:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 23:57:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 23:57:44,082 INFO L87 Difference]: Start difference. First operand 1077 states and 1726 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-14 23:57:49,874 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 [] [2023-02-14 23:58:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:58:10,867 INFO L93 Difference]: Finished difference Result 1257 states and 1979 transitions. [2023-02-14 23:58:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 23:58:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 98 [2023-02-14 23:58:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:58:10,875 INFO L225 Difference]: With dead ends: 1257 [2023-02-14 23:58:10,875 INFO L226 Difference]: Without dead ends: 1255 [2023-02-14 23:58:10,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=731, Invalid=3175, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 23:58:10,877 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 222 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 339 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2023-02-14 23:58:10,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 403 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1933 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2023-02-14 23:58:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2023-02-14 23:58:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1126. [2023-02-14 23:58:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 566 states have (on average 1.2968197879858658) internal successors, (734), 569 states have internal predecessors, (734), 521 states have call successors, (521), 38 states have call predecessors, (521), 38 states have return successors, (520), 518 states have call predecessors, (520), 520 states have call successors, (520) [2023-02-14 23:58:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1775 transitions. [2023-02-14 23:58:11,819 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1775 transitions. Word has length 98 [2023-02-14 23:58:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:58:11,820 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1775 transitions. [2023-02-14 23:58:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-14 23:58:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1775 transitions. [2023-02-14 23:58:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-14 23:58:11,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:58:11,821 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2023-02-14 23:58:11,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-14 23:58:12,026 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 [2023-02-14 23:58:12,026 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:58:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:58:12,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-14 23:58:12,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:58:12,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414123091] [2023-02-14 23:58:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:58:12,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:58:12,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:58:12,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093708511] [2023-02-14 23:58:12,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:58:12,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:12,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:58:12,034 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) [2023-02-14 23:58:12,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 23:58:12,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:58:12,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:58:12,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 23:58:12,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:58:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-02-14 23:58:12,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:58:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-14 23:58:14,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:58:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414123091] [2023-02-14 23:58:14,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:58:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093708511] [2023-02-14 23:58:14,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093708511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:58:14,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:58:14,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-02-14 23:58:14,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041023111] [2023-02-14 23:58:14,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:58:14,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 23:58:14,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:58:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 23:58:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-02-14 23:58:14,643 INFO L87 Difference]: Start difference. First operand 1126 states and 1775 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2023-02-14 23:58:45,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:59:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:59:11,501 INFO L93 Difference]: Finished difference Result 1972 states and 3119 transitions. [2023-02-14 23:59:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-14 23:59:11,502 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 107 [2023-02-14 23:59:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:59:11,506 INFO L225 Difference]: With dead ends: 1972 [2023-02-14 23:59:11,506 INFO L226 Difference]: Without dead ends: 1429 [2023-02-14 23:59:11,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=1737, Invalid=7769, Unknown=0, NotChecked=0, Total=9506 [2023-02-14 23:59:11,510 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 312 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:59:11,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 770 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time] [2023-02-14 23:59:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2023-02-14 23:59:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1257. [2023-02-14 23:59:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 629 states have (on average 1.2941176470588236) internal successors, (814), 632 states have internal predecessors, (814), 585 states have call successors, (585), 42 states have call predecessors, (585), 42 states have return successors, (584), 582 states have call predecessors, (584), 584 states have call successors, (584) [2023-02-14 23:59:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1983 transitions. [2023-02-14 23:59:12,697 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1983 transitions. Word has length 107 [2023-02-14 23:59:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:59:12,697 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1983 transitions. [2023-02-14 23:59:12,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2023-02-14 23:59:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1983 transitions. [2023-02-14 23:59:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-14 23:59:12,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:59:12,699 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:59:12,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 23:59:12,903 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 [2023-02-14 23:59:12,904 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:59:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:59:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1666306094, now seen corresponding path program 3 times [2023-02-14 23:59:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:59:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521405947] [2023-02-14 23:59:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:59:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:59:12,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:59:12,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216623606] [2023-02-14 23:59:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:59:12,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:59:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:59:12,917 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) [2023-02-14 23:59:12,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 23:59:12,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 23:59:12,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:59:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-14 23:59:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:59:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-02-14 23:59:13,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:59:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-14 23:59:16,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:59:16,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521405947] [2023-02-14 23:59:16,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:59:16,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216623606] [2023-02-14 23:59:16,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216623606] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:59:16,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:59:16,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-02-14 23:59:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332788915] [2023-02-14 23:59:16,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:59:16,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 23:59:16,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:59:16,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 23:59:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2023-02-14 23:59:16,689 INFO L87 Difference]: Start difference. First operand 1257 states and 1983 transitions. Second operand has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-14 23:59:23,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:59:34,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:59:38,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []